An ultra-thin fan

Abstract

The utility model discloses an ultrathin fan relates to consumer electronics equipment field. The ultrathin fan, including fan unit, the overall thickness of fan unit is less than or equal to 2.5mm, the outside of fan unit is provided with detachable protection unit, fan unit includes drive part and the fan blade subassembly of rotation setting on drive part, protection unit comprises two groups of protection frame including setting, and protection frame is composed of mounting frame and positioning frame, utilizes mounting frame and fixes in drive part outside, makes the fan blade subassembly between the mounting frame and positioning frame of both sides form protection space. The ultrathin fan, protection unit adopts two groups of symmetrical detachable protection frame, when needing maintenance or cleaning, the protection frame can be separated by disassembling bolt, and the operation is convenient, solves the problem of difficult maintenance of traditional fixed protection structure.

Description

Technical Field

[0001] This utility model relates to the field of consumer electronics devices, and in particular to an ultra-thin fan. Background Technology

[0002] As consumer electronics devices rapidly evolve towards ultra-thinness and miniaturization, devices such as 25W wireless chargers, ultra-thin laptops, portable car wireless chargers, and high-power power chargers place stringent requirements on the thickness, power consumption, and heat dissipation efficiency of heat dissipation components.

[0003] In existing technologies, traditional cooling fans have the following key problems: Firstly, the drive core mostly adopts the traditional motor structure, and the stacking method of its iron core and coils results in an overall thickness that generally exceeds 5mm, making it unsuitable for some special ultra-thin devices. Secondly, most fans lack targeted protective structures, or the protective components are fixed integrated designs. Without protection, the fan blade assembly is easily damaged by foreign objects. With fixed protection, it is difficult to disassemble and maintenance colleagues find it inconvenient to clean the dust from the fan blades. Third, the size and weight of traditional motors limit their application in devices with high space sensitivity, such as mobile phones and ultra-thin laptops, and cannot meet the design requirements for lightweight devices. Utility Model Content

[0004] The purpose of this invention is to provide an ultra-thin fan to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an ultra-thin fan, comprising a fan unit with an overall thickness ≤2.5mm, a detachable protective unit provided on the outer side of the fan unit, the fan unit comprising a drive component and a fan blade assembly rotatably mounted on the drive component, the protective unit comprising two sets of symmetrically arranged protective frames, and the protective frame comprising an installation frame and a positioning frame, the installation frame being fixed to the outer side of the drive component, so that the fan blade assembly is located between the installation frame and the positioning frame on both sides to form a protective space.

[0006] Preferably, the driving component includes a driving housing and a winding PCB board fixedly installed inside the driving housing. The winding PCB board adopts an ultra-thin PP laminated and stacked structure. A rotating shaft is rotatably connected to the center of the winding PCB board, and the rotating shaft passes through the driving housing and is connected to the fan blade assembly.

[0007] Preferably, positioning grooves are provided on both outer walls of the drive housing.

[0008] Preferably, the fan blade assembly consists of a turntable and multiple fan blades. The turntable is rotatably mounted on the drive housing and connected to the rotating shaft, and the multiple fan blades are arranged in a circumferential array on the outer edge of the turntable.

[0009] Preferably, the mounting frame includes a mounting frame and a plurality of first protective strips densely arranged on the inner wall of the mounting frame. A positioning strip is fixedly connected to the outer side of the mounting frame, and the positioning strip is inserted into a positioning groove.

[0010] Preferably, an installation strip is fixedly connected to the outer side of the mounting frame, and the installation strips in the protective frames on both sides are fixedly connected by bolts.

[0011] Preferably, the positioning frame includes a positioning frame body and a plurality of second protective strips densely arranged on the inner wall of the positioning frame body, and a sealing semi-circular ring is connected between the outer edge of the positioning frame body and the outer edge of the mounting frame body.

[0012] Preferably, the gap between the mounting frame and the positioning frame and the fan blade assembly is 0.1-0.3 mm.

[0013] The technical effects and advantages of this utility model are as follows: 1. This ultra-thin fan has an overall fan unit thickness of ≤2.5mm, and the drive component uses an ultra-thin PP laminated and stacked winding PCB board to replace the traditional motor, which greatly reduces the thickness of the drive core. It can be directly adapted to devices that are sensitive to thickness, such as 25W wireless chargers, mobile phone cases, and ultra-thin laptops, without taking up extra internal space in the device, thus meeting the ultra-thin design requirements of the device.

[0014] 2. This ultra-thin fan features a protective unit with two sets of symmetrical, detachable protective frames. The protective structure can be quickly assembled and disassembled by inserting the positioning strips of the mounting frame into the positioning slots of the drive housing and fixing them with mounting bolts. During normal use, the fan blade assembly is located within the protective space formed by the mounting frame and the positioning frame, which can effectively prevent foreign objects from impacting the fan blades. When maintenance or cleaning is required, the protective frame can be separated by removing the bolts. The operation is convenient and solves the problem of difficult maintenance of traditional fixed protective structures. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the rear structure of the present invention; Figure 3 This is a schematic diagram of the fan unit of this utility model; Figure 4 This is an exploded view of the fan unit of this utility model; Figure 5 This is a schematic diagram of the structure of the protective unit of this utility model; Figure 6 This is a schematic diagram of the structure of the protective frame of this utility model; Figure 7 This is a schematic diagram illustrating the usage state of this utility model in a wireless charger.

[0016] In the diagram: 1. Fan unit; 11. Drive unit; 111. Drive housing; 112. Winding PCB board; 113. Positioning slot; 12. Fan blade assembly; 121. Turntable; 122. Fan blade; 2. Protective unit; 21. Mounting frame; 211. Mounting frame; 212. First protective strip; 213. Positioning strip; 214. Mounting strip; 22. Positioning frame; 221. Positioning frame; 222. Second protective strip. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] This utility model provides, for example Figures 1-6 The ultra-thin fan shown includes a fan unit 1 with an overall thickness of ≤2.5mm. A detachable protective unit 2 is provided on the outside of the fan unit 1. The fan unit 1 includes a drive component 11 and a fan blade assembly 12 rotatably mounted on the drive component 11. The protective unit 2 includes two sets of protective frames arranged symmetrically. The protective frame is composed of a mounting frame 21 and a positioning frame 22. The mounting frame 21 is fixed to the outside of the drive component 11, so that the fan blade assembly 12 is located in a protective space between the mounting frame 21 and the positioning frame 22 on both sides.

[0019] Furthermore, the drive component 11 includes a drive housing 111 and a winding PCB board 112 fixedly installed inside the drive housing 111. The winding PCB board 112 adopts an ultra-thin PP press-fit stacked structure. A rotating shaft is rotatably connected to the center of the winding PCB board 112, and the rotating shaft passes through the drive housing 111 and is connected to the fan blade assembly 12.

[0020] The overall thickness of the fan unit 1 is ≤2.5mm, and the drive component 11 uses an ultra-thin PP laminated and stacked winding PCB board 112 to replace the traditional motor, which greatly reduces the thickness of the drive core. It can be directly adapted to devices that are sensitive to thickness, such as 25W wireless chargers, mobile phone cases, and ultra-thin laptops, without taking up extra internal space in the device, thus meeting the requirements of ultra-thin device design.

[0021] Furthermore, positioning grooves 113 are provided on both outer walls of the drive housing 111.

[0022] Furthermore, the fan blade assembly 12 consists of a turntable 121 and a plurality of fan blades 122. The turntable 121 is rotatably mounted on the drive housing 111 and connected to the rotating shaft, and the plurality of fan blades 122 are arranged in a circumferential array on the outer edge of the turntable 121.

[0023] Furthermore, the mounting frame 21 includes a mounting frame 211 and a plurality of first protective strips 212 densely arranged on the inner wall of the mounting frame 211. A positioning strip 213 is fixedly connected to the outer side of the mounting frame 211, and the positioning strip 213 is inserted into the positioning groove 113.

[0024] Furthermore, an installation strip 214 is fixedly connected to the outer side of the mounting frame 211, and the installation strips 214 in the protective frames on both sides are fixedly connected by bolts.

[0025] Furthermore, the positioning frame 22 includes a positioning frame 221 and a plurality of second protective strips 222 densely arranged on the inner wall of the positioning frame 221, and a sealing semi-circular ring is connected between the outer edge of the positioning frame 221 and the outer edge of the mounting frame 211.

[0026] Furthermore, the gap between the mounting frame 21 and the positioning frame 22 and the fan blade assembly 12 is 0.1-0.3mm.

[0027] The protective unit 2 adopts two sets of symmetrical detachable protective frames. The positioning strips 213 of the mounting frame 21 are inserted into the positioning grooves 113 of the drive housing 111 and fixed with the mounting strips 214, so as to realize the quick assembly and disassembly of the protective structure. During normal use, the fan blade assembly 12 is located in the protective space formed by the mounting frame 21 and the positioning frame 22, which can effectively prevent foreign objects from hitting the fan blade 122. When maintenance or cleaning is required, the protective frame can be separated by removing the bolts. The operation is convenient and solves the problem of difficult maintenance of traditional fixed protective structures.

[0028] Working principle: A 3-5.5V low-voltage power supply is connected to the drive unit 11 of the fan unit 1. The current flows through the winding PCB board 112 inside the drive unit 11. The winding PCB board 112 uses an ultra-thin PP material press-fit structure to replace the iron core and coil of the traditional motor. After the coil of the winding PCB board 112 is energized, it generates an alternating magnetic field according to the principle of electromagnetic induction. Since the PP press-fit structure of the winding PCB board 112 has the characteristics of being ultra-thin and having a concentrated magnetic field, the alternating magnetic field can act efficiently on the rotating shaft at its center, forming a continuous electromagnetic driving force, replacing the mechanical drive structure of the traditional motor, and realizing coreless and ultra-thin drive.

[0029] The electromagnetic driving force generated by the winding PCB board 112 directly drives the central rotating shaft to rotate. One end of the rotating shaft passes through the drive housing 111 of the drive component 11 and is rigidly connected to the turntable 121 of the fan blade assembly 12 through an interference fit. This connection method can avoid the gap loss of traditional transmission structures and ensure that 100% of the power is transmitted to the turntable 121. The turntable 121 rotates synchronously under the drive of the rotating shaft, and the fan blades 122 arranged in a circular array on its outer edge rotate at high speed with the turntable 121, with an initial speed of up to 15,000 rpm. The fan blades 122 adopt an ultra-thin arc design, which can quickly cut the air at high speed to form a directional airflow, and will not increase the overall size of the fan due to their own thickness.

[0030] The airflow generated by the rotation of the fan blade 122 is efficiently guided under the structural constraints of the protective unit 2. The mounting frame 21 of the protective unit 2 blocks foreign objects from entering through the first protective strip 212 and the positioning frame 22 through the second protective strip 222, while preventing the airflow from spreading in the non-heat dissipation direction. Furthermore, the sealing semi-circular ring between the mounting frame 21 and the positioning frame 22 can completely cover the edge gap between the two to prevent airflow leakage and ensure that the airflow is concentrated and flows towards the heat dissipation target.

[0031] Concentrated airflow passes through the heat dissipation target surface at high velocity, quickly removing the heat generated during equipment operation; at the same time, since the overall thickness of fan unit 1 is ≤2.5mm, it can fit closely into the internal space of ultra-thin equipment, reducing heat loss in the airflow transmission path, and ultimately achieving efficient cooling of small space, high power density equipment.

[0032] like Figure 7 As shown, the ultra-thin fan is fixed to the heat dissipation surface of the 25W wireless charging module with thermally conductive adhesive. The low-voltage power supply end of the fan is connected to the 5V output end of the wireless charger. When the wireless charger is working, the fan blade 122 rotates at a speed of 15,000 rpm. The heat generated by the wireless charger is quickly dissipated through the protective frame, which reduces the working temperature of the wireless charger and avoids the decrease in charging efficiency due to overheating.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An ultra-thin fan comprising a fan unit (1) having an overall thickness of < 2.5 mm, characterized in that, The fan unit (1) is provided with a detachable protective unit (2) on its outer side. The fan unit (1) includes a drive component (11) and a fan blade assembly (12) rotatably mounted on the drive component (11). The protective unit (2) includes two sets of protective frames arranged symmetrically. The protective frame is composed of a mounting frame (21) and a positioning frame (22). The mounting frame (21) is fixed to the outside of the drive component (11), so that the fan blade assembly (12) is located in a protective space between the mounting frame (21) and the positioning frame (22) on both sides.

2. The ultra-thin fan according to claim 1, characterized in that, The drive unit (11) includes a drive housing (111) and a winding PCB board (112) fixedly installed inside the drive housing (111). The winding PCB board (112) adopts an ultra-thin PP press-fit superimposed structure. A rotating shaft is rotatably connected to the center of the winding PCB board (112), and the rotating shaft passes through the drive housing (111) and is connected to the fan blade assembly (12).

3. The ultra-thin fan according to claim 2, characterized in that, The drive housing (111) has positioning grooves (113) on both outer walls.

4. The ultra-thin fan according to claim 2, characterized in that, The fan blade assembly (12) consists of a turntable (121) and a plurality of fan blades (122). The turntable (121) is rotatably mounted on the drive housing (111) and connected to the rotating shaft. The plurality of fan blades (122) are arranged in a circumferential array on the outer edge of the turntable (121).

5. The ultra-thin fan according to claim 3, characterized in that, The mounting frame (21) includes a mounting frame (211) and a plurality of first protective strips (212) densely arranged on the inner wall of the mounting frame (211). A positioning strip (213) is fixedly connected to the outer side of the mounting frame (211), and the positioning strip (213) is inserted into the positioning groove (113).

6. The ultra-thin fan according to claim 5, characterized in that, The outer side of the mounting frame (211) is also fixedly connected with mounting strips (214), and the mounting strips (214) in the protective frames on both sides are fixedly connected by bolts.

7. The ultra-thin fan according to claim 5, characterized in that, The positioning frame (22) includes a positioning frame (221) and a plurality of second protective strips (222) densely arranged on the inner wall of the positioning frame (221), and a sealing semi-circular ring is connected between the outer edge of the positioning frame (221) and the outer edge of the mounting frame (211).

8. The ultra-thin fan according to claim 1, characterized in that, The gap between the mounting frame (21) and the positioning frame (22) and the fan blade assembly (12) is 0.1-0.3 mm.

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