Cooling fan easy to assemble

Abstract

The cooling fan easy to assemble comprises a base, a rotor assembly, a stator winding, an impeller, a PCBA board, back glue and an FPC, an opening and a positioning boss are arranged on the bottom face of the base, one end of the FPC is pasted on the positioning boss through the back glue, a golden finger is arranged on the surface of the FPC, and the other end of the FPC is connected with the rotor assembly. And the other end of the FPC passes through the opening, extends into the base and is welded with the PCBA board. According to the utility model, the structure design is reasonable, the FPC is adopted to replace a wire harness, the golden fingers on the surface of the FPC are utilized to carry out probe contact type connection with an external system, and the traditional plug-in assembly process of a male end and a female end is omitted. Compared with a traditional wiring harness connecting structure, the FPC is small in size, high in flexibility, small in occupied space and neat in appearance, the procedure of manually arranging wiring harnesses is omitted, dependence on manpower is reduced, automatic production is facilitated, and the assembling efficiency and quality are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, specifically to an easy-to-assemble cooling fan. Background Technology

[0002] Cooling fans are important devices for cooling electronic devices. They use the rotation of fan blades to drive airflow, thereby cooling the electronic device through air convection.

[0003] However, the current cooling fan industry commonly uses wire harness connections. For example, patent application CN117118121A, entitled "Fan Motor Structure," discloses a fan motor structure including a stator base, a wire harness fixing assembly, a stator assembly, and a back cover. The stator base has a plurality of through holes penetrating its front and back sides. The front side of the stator base has a central shaft and a stator assembly, while the back side has a wire harness fixing assembly for fixing a wire harness assembly, and it has a plurality of positioning holes corresponding to the through holes. The back cover is located on the back of the stator base to cover the wire harness assembly. The wire harness fixing assembly; the stator assembly has a winding terminal that connects to the winding group, and the free end of the winding terminal extends from the front of the stator base through a through hole to the back of the stator base and is inserted into the positioning hole of the wire harness fixing assembly, thereby connecting with the wire harness group; although it achieves the purpose of connection through the wire harness, the wire harness is thick, occupies a lot of space, increases the overall weight, is not conducive to operation in small spaces, and the appearance is messy, requiring manual tidying. In addition, the other end of the wire harness is assembled by plug-in assembly of male and female ends, which is highly dependent on manual labor and is not conducive to automated production. Utility Model Content

[0004] To address the aforementioned shortcomings, the purpose of this utility model is to provide an easy-to-assemble cooling fan with a reasonable structural design, small footprint, and easy assembly.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] An easy-to-assemble cooling fan includes a base, a rotor assembly, a stator winding, an impeller, a PCBA board, adhesive backing, and an FPC. The PCBA board is disposed inside the base. The bottom surface of the base has an opening corresponding to the position of the PCBA board. The base has a positioning boss on one side corresponding to the opening. One end of the FPC is attached to the positioning boss by adhesive backing and has gold fingers on its surface. The other end of the FPC extends into the base through the opening and has pads for soldering to the PCBA board.

[0007] In a preferred embodiment of this invention, the positioning boss is provided with a positioning post, and the FPC is provided with a positioning hole that matches the positioning post. By cooperating with the positioning post and the positioning hole, the FPC is precisely positioned, ensuring the accuracy of its position during the bonding process. This avoids problems such as poor electrical connections caused by positional deviations, enhances product consistency and reliability, and helps improve production efficiency.

[0008] In a preferred embodiment of this invention, the positioning boss has flanges on both sides. The flanges can limit the movement of the FPC on both sides, restricting its movement in the lateral direction, and can also effectively prevent dust from entering the contact end of the FPC.

[0009] As a preferred embodiment of this utility model, the connection position between the positioning boss and the opening is provided with a ramp transition, which can smoothly guide the FPC into the base.

[0010] In a preferred embodiment of this invention, a limiting groove adapted to the FPC is provided near the edge of the opening on the slope. When the FPC passes through the opening and extends into the base, the FPC can be precisely embedded in the limiting groove, thus limiting the FPC and preventing problems such as solder joint detachment or poor contact caused by FPC movement, thereby improving the reliability and service life of the product.

[0011] As a preferred embodiment of this utility model, one end of the positioning boss protrudes from the side wall of the base to form an extension, thereby increasing the support area of ​​the positioning boss and making it easier to assemble.

[0012] As a preferred embodiment of this utility model, the side wall of the base is provided with reinforcing ribs that are connected to the extension to improve the structural strength.

[0013] In a preferred embodiment of this invention, the base has mounting ears on its side wall, and the mounting ears are equipped with anti-vibration pads. When the cooling fan is installed on an electronic device, the anti-vibration pads can buffer and reduce vibrations, minimizing the impact of vibrations generated during the operation of the electronic device on the cooling fan.

[0014] The beneficial effects of this utility model are as follows: The utility model has a reasonable structural design, using an FPC (Flexible Printed Circuit) instead of wire harnesses. One end of the FPC is adhered to the positioning boss on the base using adhesive, and its surface is equipped with gold fingers to facilitate probe-type connection with external systems, eliminating the traditional plug-and-play assembly process of male and female terminals. The other end of the FPC extends through an opening into the base and is soldered to the PCBA board via pads to achieve electrical connection. Compared to the traditional wire harness connection structure, the FPC is smaller and more flexible, occupies less space, has a cleaner appearance, reduces the need for manual wire harness handling, reduces reliance on manual labor, facilitates automated production, and thus improves assembly efficiency and quality.

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is an exploded structural diagram of the present invention. Figure 1 .

[0018] Figure 3 This is an exploded structural diagram of the present invention. Figure 2 . Detailed Implementation

[0019] See the example. Figures 1 to 3 This embodiment provides an easy-to-assemble cooling fan, which includes a base 1, a rotor assembly, a stator winding, an impeller 2, a PCBA board 3, adhesive backing 4, and an FPC 5.

[0020] The PCBA board 3 is annular and is disposed within the base 1. A central tube is provided within the base 1 corresponding to the center of the PCBA board 3. The stator winding consists of several winding coils arranged symmetrically in a circle on the PCBA board 3. The rotor assembly is disposed within the impeller cavity of the impeller 2, and the shaft of the rotor assembly is mounted on the central tube via a bearing.

[0021] The base 1 has an opening 11 on its bottom surface corresponding to the PCBA board 3. A positioning boss 12 is provided on one side of the base 1 corresponding to the opening 11. Preferably, a ramp transition 13 is provided at the connection between the positioning boss 12 and the opening 11, allowing the FPC 5 to smoothly enter the base 1. A limiting groove 111, adapted to the FPC 5, can also be provided near the edge of the opening 11 close to the ramp. When the FPC 5 passes through the opening 11 and extends into the base 1, the FPC 5 can be precisely embedded in the limiting groove 111, limiting the FPC 5 and preventing problems such as solder joint detachment or poor contact caused by FPC 5 movement, thus improving product reliability and service life.

[0022] One end of the FPC5 is attached to the positioning boss 12 with adhesive 4, and the surface is provided with gold fingers 51. Preferably, two positioning posts 121 are provided on the positioning boss 12, and the FPC5 is provided with positioning holes 52 that are adapted to the two positioning posts 121.

[0023] The positioning post 121, in conjunction with the positioning hole 52, precisely positions the FPC5, ensuring its accurate placement during the bonding process. This solves the problem of misaligned or incomplete PFC bonding caused by bending, squeezing, and bonding of the FPC5, thus avoiding electrical connection issues due to positional deviations. This enhances product consistency and reliability, and improves production efficiency. Furthermore, the height of the positioning post 121 is greater than the thickness of the FPC5, meaning the positioning post 121 is taller than the FPC. This effectively prevents damage, crushing, or breakage of the FPC's contact ends during transportation or assembly when the fan is subjected to external forces, improving fan reliability. Flanges 122 can also be provided on both sides of the positioning boss 12. The flanges 122 limit the movement of the FPC in the lateral direction and effectively prevent dust from entering the contact ends of the FPC.

[0024] The other end of the FPC5 extends through the opening 11 into the base 1 and is provided with solder pads. The solder pads are soldered to the PCBA board 3 through a soldering process. Preferably, a label 6 is also affixed to the bottom surface of the base 1, which can close the opening 11.

[0025] One end of the positioning boss 12 protrudes from the side wall of the base 1 to form an extension. The extension increases the support area of ​​the positioning boss 12, making assembly easier. A reinforcing rib 14 connected to the extension is provided on the side wall of the base 1 to enhance structural strength.

[0026] Mounting ears 15 are provided on the side wall of the base 1, and anti-vibration pads 16 are provided on the mounting ears 15. When the cooling fan is installed on the electronic device, the anti-vibration pads 16 can buffer and reduce vibration, reducing the impact of vibration generated by the electronic device during operation on the cooling fan. The anti-vibration pads 16 are provided with mounting holes, through which screws are passed to achieve the purpose of installation.

[0027] During assembly and use, since the positioning boss 12 and the gold fingers 51 of the FPC5 directly protrude from the bottom surface of the base 1, a clearance position matching the shape of the positioning boss 12 can be pre-installed in the external system to be installed for matching installation. The clearance position is equipped with a contact probe. By inserting the positioning boss 12 into the clearance position, the gold fingers 51 on the surface of the FPC5 can directly make a probe contact connection with the external system, which can be completed without soldering or plugging and unplugging. This eliminates the traditional plugging and unplugging assembly process of male and female terminals, making fan installation and connection convenient, improving production efficiency. Moreover, the good fit between the positioning boss 12 and the clearance position can effectively prevent dust and foreign objects from entering the contact end of the FPC5, avoiding poor contact of the FPC and ensuring high working stability.

[0028] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model. As described in the above embodiments of this utility model, other fan structures obtained by using the same or similar structures are all within the protection scope of this utility model.

Claims

1. An easy-to-assemble cooling fan, comprising a base, a rotor assembly, a stator winding, an impeller, and a PCBA board, characterized in that, It also includes adhesive backing and FPC. The PCBA board is disposed in the base. The bottom surface of the base has an opening corresponding to the position of the PCBA board. The base has a positioning boss on one side corresponding to the opening. One end of the FPC is attached to the positioning boss by adhesive backing and has gold fingers on its surface. The other end of the FPC extends into the base through the opening and has pads for soldering with the PCBA board.

2. The easily assembled heat dissipation fan according to claim 1, wherein: The positioning boss is provided with a positioning post, and the FPC is provided with a positioning hole that matches the positioning post.

3. The easily assembled heat dissipation fan according to claim 1, wherein: The positioning boss has flanges on both sides.

4. The easily assembled heat-dissipating fan according to any one of claims 1-3, characterized in that: The connection between the positioning boss and the opening is provided with a ramp transition.

5. The easily assembled heat dissipation fan according to claim 4, wherein: The opening is provided with a limiting groove that is adapted to the FPC at the edge of the slope.

6. The easy assembly heat dissipation fan according to claim 1, wherein: One end of the positioning boss protrudes from the side wall of the base to form an extension.

7. The easy assembly heat dissipation fan according to claim 6, wherein: The base has reinforcing ribs on its side wall that are connected to the extension.

8. The easy assembly heat dissipation fan according to claim 1, wherein: The base has mounting ears on its side wall, and the mounting ears are provided with shock-absorbing pads.

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