Butterfly-shaped air suction fan for automobile seat

Abstract

The utility model discloses an automobile seat butterfly-shaped air suction fan which comprises an upper shell, a lower shell, fan blades and a PCB (printed circuit board), the upper shell is connected with the lower shell, the fan blades are arranged between the upper shell and the lower shell, an air inlet is arranged on the upper shell, each fan blade comprises an upper fan blade ring, a lower fan blade ring, a mounting groove and a central shaft, the upper fan blade ring and the lower fan blade ring are coaxial, and the PCB is arranged in the mounting groove. The installation groove is formed in the middle of the upper fan blade ring and the middle of the lower fan blade ring and fixedly connected with the lower fan blade ring, a plurality of blades evenly distributed in the circumferential direction are arranged between the upper fan blade ring and the lower fan blade ring, and the upper fan blade ring, the lower fan blade ring, the installation groove and the blades are of an integrated injection molding structure. A mounting groove is formed in the lower shell, a magnetic ring rotor is coaxially and fixedly mounted in the mounting groove, the PCB is mounted on the lower shell, a fan stator is fixedly arranged on the PCB and coaxially arranged in the magnetic ring rotor, and the central shaft penetrates through the fan stator and is rotationally connected to the lower shell. The air volume can be increased, noise can be reduced, and the driving comfort can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a butterfly-shaped air suction fan for automobile seats. Background Art

[0002] With rising living standards, cars have become a popular means of transportation, leading to increasing demands for vehicle comfort. Car seat comfort is crucial for vehicle use, and more and more manufacturers are adopting seats with ventilation features. Fan airflow and noise levels in ventilation systems are key factors in effective ventilation. Improving fan airflow and reducing noise are key research and design areas in this field. Utility Model Content

[0003] The purpose of the utility model is to provide a butterfly-shaped air suction fan for a car seat to solve the problems existing in the above-mentioned prior art, thereby increasing the air volume, reducing noise and improving driving comfort.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] The utility model provides a butterfly-shaped air suction fan for a car seat, comprising an upper shell, a lower shell, fan blades and a PCB board, wherein the upper shell and the lower shell are connected to each other, the fan blades are arranged between the upper shell and the lower shell, an air inlet is provided on the upper shell, air enters the fan blades through the air inlet and is then discharged from around the fan blades, the fan blades comprise an upper fan blade ring, a lower fan blade ring, a mounting groove and a central axis, the upper fan blade ring and the lower fan blade ring are coaxially arranged, the mounting groove is arranged in the middle of the upper fan blade ring and the lower fan blade ring and is fixed to the lower fan blade ring A fixed connection is provided, and a plurality of blades evenly distributed along the circumferential direction are provided between the upper blade ring and the lower blade ring. The upper blade ring, the lower blade ring, the mounting groove and each of the blades are an integral injection molding structure. The central axis is pre-embedded and fixed in the center of the mounting groove. A magnetic ring rotor is coaxially fixedly installed in the mounting groove. The PCB board is installed on the lower shell. A fan stator is fixed on the PCB board. The fan stator is coaxially arranged in the magnetic ring rotor. The central axis passes through the fan stator and is rotatably connected to the lower shell.

[0006] Preferably, the magnetic ring rotor is interference fit with the mounting groove.

[0007] Preferably, a pressing joint is fixedly provided at one end of the central shaft, the pressing joint is pre-buried in the installation groove, and the pressing joint is a plum blossom-shaped structure.

[0008] Preferably, the magnetic ring rotor comprises an annular iron shell and a magnetic ring fixed on the inner wall of the iron shell.

[0009] Preferably, the PCB board is provided with a pin, the lower shell is provided with a plug-in slot, and the pin is located in the plug-in slot.

[0010] Preferably, the PCB board is provided with a plurality of fixing holes, and the lower shell is provided with a plurality of plastic welding posts corresponding to the fixing holes one by one. The plastic welding posts can pass through the fixing holes and fix the PCB board by plastic welding.

[0011] Preferably, the iron shell is made of pure iron material, and the magnetic ring is made of ferrite resin.

[0012] Compared with the prior art, the utility model has achieved the following technical effects:

[0013] The utility model can be used to discharge air from around the fan blades after entering through the air inlet on the upper shell. The air around the fan blades can be used as air outlets, thereby increasing the air intake volume. The central axis is embedded and fixed in the center of the mounting groove, which can increase the injection molding strength. The fan blades are more stable and have better dynamic balance during high-speed rotation, which is conducive to reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic diagram of the exploded structure of the butterfly-shaped air suction fan for a car seat provided by the utility model;

[0016] Figure 2 This is a schematic diagram of the overall structure of the butterfly-shaped air suction fan for a car seat provided by the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the fan blades in the utility model;

[0018] Figure 4 This is a front view structural diagram of the fan blade in the utility model;

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of the fan blade in the present invention;

[0020] Figure 6 This is a schematic diagram of the connection structure between the central shaft and the press joint in the utility model;

[0021] Figure 7 This is a schematic structural diagram of the magnetic ring rotor in the present utility model;

[0022] Figure 8 This is a schematic diagram of the connection structure between the PCB board and the fan stator in the utility model;

[0023] Figure 9 This is a schematic diagram of the use of plastic welding to fix the PCB board in the present invention;

[0024] Figure 10 This is a schematic structural diagram of the lower shell of the utility model;

[0025] Figure 11 This is a structural diagram of the utility model when the air inlet channel is installed at the air inlet of the upper shell.

[0026] In the figure: 1-upper shell, 2-lower shell, 3-fan blades, 4-PCB board, 5-air inlet, 6-upper fan blade ring, 7-lower fan blade ring, 8-mounting slot, 9-center axis, 10-magnetic ring rotor, 11-blades, 12-fan stator, 13-pressing joint, 14-pin, 15-plug-in slot, 16-fixing hole, 17-plastic welding column, 18-air inlet channel, 19-iron shell, 20-magnetic ring. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] The purpose of the utility model is to provide a butterfly-shaped air suction fan for a car seat, so as to solve the problems existing in the prior art, increase the air volume, reduce noise and improve driving comfort.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0030] like Figures 1-10As shown, this embodiment provides a butterfly-shaped suction fan for a car seat, comprising an upper shell 1, a lower shell 2, a fan blade 3 and a PCB board 4. The upper shell 1 and the lower shell 2 are connected to each other, and the fan blade 3 is arranged between the upper shell 1 and the lower shell 2. An air inlet 5 is provided on the upper shell 1, and air enters the fan blade 3 from the air inlet 5 and is then discharged from around the fan blade 3. The fan blade 3 comprises an upper fan blade ring 6, a lower fan blade ring 7, a mounting groove 8 and a central axis 9. The upper fan blade ring 6 and the lower fan blade ring 7 are coaxially arranged, and the mounting groove 8 is arranged in the middle of the upper fan blade ring 6 and the lower fan blade ring 7 and is fixedly connected to the lower fan blade ring 7. A plurality of blades 11 are provided between the ring 6 and the lower blade ring 7, which are evenly distributed along the circumferential direction. The upper blade ring 6, the lower blade ring 7, the mounting groove 8 and the blades 11 are an integral injection-molded structure. The central axis 9 is pre-embedded and fixed in the center of the mounting groove 8. A magnetic ring rotor 10 is coaxially fixedly installed in the mounting groove 8. The magnetic ring rotor 10 is interference fit with the mounting groove 8. The PCB board 4 is installed on the lower shell 2. A fan stator 12 is fixed on the PCB board 4. The fan stator 12 is coaxially arranged in the magnetic ring rotor 10. The central axis 9 passes through the fan stator 12 and is rotatably connected to the lower shell 2.

[0031] In this embodiment, a press-fit joint 13 is fixed to one end of the central shaft 9. This joint 13 is pre-buried within the mounting slot 8 and has a plum blossom-shaped structure made of high-strength steel. This improves the injection molding strength of the shaft and enhances the stability of the fan blades 3 during high-speed rotation. The central shaft 9 is rotatably connected to the lower housing 2 via a bearing. The press-fit joint 13 and central shaft 9 are secured together by rivets.

[0032] In this embodiment, the magnetic ring rotor 10 comprises an annular iron housing 19 and a magnetic ring 20 fixed to the inner wall of the iron housing 19. The iron housing 19 is stamped from pure iron, while the magnetic ring 20 is made of ferrite resin. The iron housing 19 supports the flexible magnetic ring 20 within and shields it from external magnetic fields. The ferrite resin magnetic ring 20 has excellent magnetic properties and is magnetized by a horseshoe-shaped quadrupole magnetic field.

[0033] In this embodiment, the PCB board 4 is provided with a pin 14, and the lower shell 2 is provided with a plug slot 15, and the pin 14 is located in the plug slot 15. The pin 14 is used to achieve electrical connection with other devices, without the need for connecting wires, which can reduce manufacturing costs.

[0034] In this embodiment, the PCB 4 is provided with a plurality of fixing holes 16, and the lower housing 2 is provided with a plurality of plastic welding posts 17 corresponding to each fixing hole 16. The plastic welding posts 17 can pass through the fixing holes 16 and secure the PCB 4 by plastic welding. After passing through the fixing holes 16 in the PCB 4, the upper ends of the plastic welding posts 17 are melted by a plastic welding machine to form mushroom heads, thereby firmly securing the PCB 4 to the lower housing 2.

[0035] In the present invention, the fan blades 3 rotate, and air enters from the air inlet 5 above and flows out from the periphery of the fan blades 3. The upper and lower shells are connected by four fixing columns, and the remaining space can be used as an air outlet, thereby increasing the air volume sucked in.

[0036] In the present utility model, Figure 11 As shown, by connecting different air inlet channels 18 at the air inlet 5 of the upper shell 1, different air suction working conditions can be applied.

[0037] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A butterfly-shaped air suction fan for a car seat, characterized in that: The invention comprises an upper shell, a lower shell, a fan blade and a PCB board, wherein the upper shell and the lower shell are connected to each other, the fan blade is arranged between the upper shell and the lower shell, an air inlet is arranged on the upper shell, air enters the fan blade through the air inlet and is then discharged from around the fan blade, the fan blade comprises an upper fan blade ring, a lower fan blade ring, a mounting groove and a central axis, the upper fan blade ring and the lower fan blade ring are arranged coaxially, the mounting groove is arranged in the middle of the upper fan blade ring and the lower fan blade ring and is fixedly connected to the lower fan blade ring, the upper fan blade ring A plurality of blades evenly distributed along the circumferential direction are arranged between the upper blade ring and the lower blade ring, the upper blade ring, the lower blade ring, the mounting groove and each blade are an integral injection molding structure, the central axis is pre-embedded and fixed in the center of the mounting groove, a magnetic ring rotor is coaxially fixedly installed in the mounting groove, the PCB board is installed on the lower shell, a fan stator is fixedly arranged on the PCB board, the fan stator is coaxially arranged in the magnetic ring rotor, and the central axis passes through the fan stator and is rotatably connected to the lower shell.

2. The butterfly-shaped air suction fan for automobile seat according to claim 1, characterized in that: The magnetic ring rotor is interference fit with the mounting groove.

3. The butterfly-shaped air suction fan for automobile seat according to claim 1, characterized in that: A crimping joint is fixedly provided at one end of the central axis. The crimping joint is pre-buried in the installation groove and is a plum blossom-shaped structure.

4. The butterfly-shaped air suction fan for automobile seat according to claim 1, characterized in that: The magnetic ring rotor comprises an annular iron shell and a magnetic ring fixed on the inner wall of the iron shell.

5. The butterfly-shaped air suction fan for automobile seat according to claim 1, characterized in that: The PCB board is provided with a plug pin, the lower shell is provided with a plug-in slot, and the plug pin is located in the plug-in slot.

6. The butterfly-shaped air suction fan for a car seat according to claim 1, characterized in that: The PCB board is provided with a plurality of fixing holes, and the lower shell is provided with a plurality of plastic welding posts corresponding to the fixing holes one by one. The plastic welding posts can pass through the fixing holes and fix the PCB board by plastic welding.

7. The butterfly-shaped air suction fan for a car seat according to claim 4, characterized in that: The iron shell is made of pure iron material, and the magnetic ring is made of ferrite resin.

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