Improved fan blades

Abstract

The present invention discloses a fan blade with improved structure, comprising an axis, a permanent magnet and a fan blade, wherein the fan blade is coaxially fixedly connected to the axis, a plurality of inclined and extended blades are formed on the circumferential outer wall of the fan blade, the end of the blade in the extension direction is fixedly connected to a positioning ring concentric with the fan blade, and the permanent magnet is fixedly clamped in the annular gap between the fan blade and the positioning ring. The present invention forms an integrated structure with the fan blade and the permanent magnet or a magnetic concentrating sheet for installing the permanent magnet by in-mold injection molding, and the permanent magnet or the magnetic concentrating sheet is embedded in the annular gap between the fan blade and the positioning ring, which effectively reduces the thickness of the fan rotor, thereby realizing the thin design of the fan, and at the same time, within a limited space, it is beneficial to increase the height of the fan blade, thereby improving the heat dissipation effect of the fan.

Description

Technical Field

[0001] The invention relates to a fan, and in particular to a fan blade with improved structure. Background Art

[0002] Generally, the blades of ultra-thin fans with a total height of 4 mm or less are formed by plastic injection and coated on the outer surface of the magnetic collecting plate, and the blades are formed outside the coated plastic. One disadvantage of this design is that the plastic coated on the outer surface of the magnetic collecting plate has a certain thickness, which limits the height of the blades. Summary of the invention

[0003] In order to overcome the above-mentioned defects, the present invention provides a fan blade with an improved structure, which makes the fan rotor thinner and effectively increases the blade height of the fan blade, thereby improving the overall strength of the fan rotor and the heat dissipation effect of the fan.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a fan blade with improved structure, including an axis, a permanent magnet and a fan blade, the fan blade is coaxially fixedly connected to the axis, a plurality of inclined extending blades are formed on the circumferential outer wall of the fan blade, the end of the blade in the extension direction is fixedly connected to a positioning ring concentric with the fan blade, and the permanent magnet is fixedly clamped in the annular gap between the fan blade and the positioning ring.

[0005] As a further improvement of the present invention, the fan blades and the permanent magnets are an integrally formed structure by in-mold injection molding.

[0006] As a further improvement of the present invention, an annular magnetic field collecting plate is further provided, and the magnetic field collecting plate is fixedly clamped in the annular gap formed between the fan blade and the positioning ring.

[0007] As a further improvement of the present invention, a radially outwardly protruding first stop portion is formed on the outer circumferential wall of the fan blade, and an inwardly protruding second stop portion is formed on the inner circumferential wall of the positioning ring. The magnetic collecting sheet is tightly clamped in the space formed by the outer circumferential wall of the fan blade and the first stop portion thereon, the positioning ring and the second stop portion thereon, and the blade, and the permanent magnet is tightly clamped between the first stop ring and the second stop ring.

[0008] As a further improvement of the present invention, both the first stopper and the second stopper are annular structures.

[0009] As a further improvement of the present invention, the magnetic concentrating sheet and the fan blades are an integrally formed structure by in-mold injection molding.

[0010] As a further improvement of the present invention, at least one concave structure is formed on the inner ring side wall of the magnetic focusing plate, and at least one convex structure is formed on the outer circumferential wall of the fan blade, and the convex structures on the fan blade are inserted into the concave structure of the magnetic focusing plate in a one-to-one correspondence.

[0011] The beneficial effect of the present invention is that the present invention forms an integrated structure with the fan blades and the permanent magnets or the magnetic concentrating sheets for installing the permanent magnets by means of in-mold injection molding, and the permanent magnets or the magnetic concentrating sheets are embedded in the annular gap between the fan blades and the positioning ring, thereby effectively reducing the thickness of the fan rotor and realizing a thin design of the fan. At the same time, within a limited space, it is beneficial to increase the height of the fan blades, thereby improving the heat dissipation effect of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural principle diagram of the prior art;

[0013] Figure 2 This is a first structural principle diagram of the present invention;

[0014] Figure 3 A first stereogram of a first structure of the present invention;

[0015] Figure 4 A second stereoscopic view of the first structure of the present invention;

[0016] Figure 5 It is a front view of the first structure of the present invention;

[0017] Figure 6 It is a rear view of the first structure of the present invention;

[0018] Figure 7 It is a front view of the magnetic concentrating sheet of the present invention;

[0019] Figure 8 This is a second structural principle diagram of the present invention. DETAILED DESCRIPTION

[0020] Embodiment: A fan blade with improved structure includes an axis 1, a permanent magnet 3 and a fan blade 2, wherein the fan blade 2 is coaxially fixedly connected to the axis 1, a plurality of inclined extending blades 4 are formed on the circumferential outer wall of the fan blade 2, the end of the blade 4 in the extension direction is fixedly connected to a positioning ring 6 concentric with the fan blade 2, and the permanent magnet 3 is fixedly clamped in the annular gap between the fan blade 2 and the positioning ring 6.

[0021] By adopting a simple structure, the permanent magnet 3 is fixed between the fan blade 2 and the positioning ring 6, which effectively reduces the thickness of the fan rotor, thereby realizing a thin design of the fan. At the same time, within a limited space, it is helpful to increase the height of the fan blade 2, thereby improving the heat dissipation effect of the fan.

[0022] The fan blade 2 and the permanent magnet 3 are an integrally formed structure by in-mold injection molding. This structure allows the fan blade 2 and the permanent magnet 3 to be firmly connected to avoid falling off, and has high production efficiency.

[0023] An annular magnetic collecting plate 5 is also provided, and the magnetic collecting plate 5 is fixedly clamped in the annular gap formed between the fan blade 2 and the positioning ring 6. At least one through hole is designed on the inner diameter of the magnetic collecting plate 5. During injection molding, the inner diameter of the through hole of the magnetic collecting plate 5 cooperates with the mold to position the magnetic collecting plate 5, and the plastic flows through the through hole of the magnetic collecting plate 5 to form the fan blade 2 and the blade 4 thereon and the positioning ring 6 at the same time.

[0024] The outer circumferential wall of the blade 2 is also formed with a radially outwardly protruding first stopper 7, and the inner circumferential wall of the positioning ring 6 is formed with an inwardly protruding second stopper 8. The magnetic collecting sheet 5 is tightly clamped in the space formed by the outer circumferential wall of the blade 2 and the first stopper 7 thereon, the positioning ring 6 and the second stopper 8 thereon, and the blade 4, and the permanent magnet 3 is tightly clamped between the first stopper ring and the second stopper ring. One axial end of the magnetic collecting sheet 5 is tightly against the blade 4 of the blade 2, and the other axial end is tightly against the first stopper 7 and the second stopper 8. The inner circumference of the magnetic collecting sheet 5 is tightly against the outer circumferential wall of the blade 2, and the outer circumferential wall of the magnetic collecting sheet 5 is tightly against the inner wall of the positioning ring 6. This structure firmly covers and positions the magnetic collecting sheet 5, and the positioning is firm, which can prevent the magnetic collecting sheet 5 from being separated from the blade 2.

[0025] The first stopper 7 and the second stopper 8 are both annular structures, or can be a structure with multiple convex points.

[0026] The magnetic collecting sheet 5 and the fan blade 2 are an integrally formed structure by in-mold injection molding. During injection molding, the plastic flows from the inner ring of the magnetic collecting sheet 5 to form a circular ring or at least one fixed point (i.e., the first stopper 7) on the lower surface of the magnetic collecting sheet 5; the plastic forms the blades 4 of the fan blade 2 on the upper surface of the magnetic collecting sheet 5 and flows downward at the outer diameter of the magnetic collecting sheet 5 to form a ring-shaped or discontinuous block-shaped coating (i.e., the positioning ring 6 and the second stopper 8 thereon) on the outer diameter and lower surface of the magnetic collecting sheet 5, clamping and fixing the magnetic collecting sheet 5. This structure firmly fixes the magnetic collecting sheet 5.

[0027] At least one concave structure 9 is formed on the inner ring side wall of the magnetic focusing sheet 5, and at least one convex structure is formed on the outer circumferential wall of the blade 2, and the convex structures on the blade 2 are inserted into the concave structure 9 of the magnetic focusing sheet 5 in a one-to-one correspondence. The concave structure 9 on the magnetic focusing sheet 5 and the convex structure on the outer circumferential wall of the blade 2 form a chimeric structure, which can prevent the magnetic focusing sheet 5 from rotating loose.

Claims

1. A fan blade with improved structure, characterized in that: The invention comprises an axis (1), a permanent magnet (3) and a fan blade (2), wherein the fan blade is coaxially fixedly connected to the axis, a plurality of inclined extending blades (4) are formed on the outer circumferential wall of the fan blade, the end of the blade in the extension direction is fixedly connected to a positioning ring (6) concentric with the fan blade, the permanent magnet fixing clamp is arranged in the annular gap between the fan blade and the positioning ring, the fan blade and the permanent magnet are an in-mold injection-molded integrally formed structure, and an annular magnetic collecting plate (5) is also provided, the magnetic collecting plate fixing clamp is arranged in the annular gap formed between the fan blade and the positioning ring, at least one through hole is designed on the inner diameter of the magnetic collecting plate, and during injection molding, the inner diameter of the through hole of the magnetic collecting plate cooperates with the mold to position the magnetic collecting plate, and plastic is injected from the through hole of the magnetic collecting plate Fluid flows through the fan blade and the blades thereon and simultaneously forms a positioning ring, a radially outwardly protruding first stop portion (7) is also formed on the circumferential outer wall of the fan blade, and an inwardly protruding second stop portion (8) is formed on the circumferential inner wall of the positioning ring. The magnetic collecting sheet is tightly clamped in the space formed by the circumferential outer wall of the fan blade and the first stop portion thereon, the positioning ring and the second stop portion thereon and the blade, and the permanent magnet is tightly clamped between the first stop ring and the second stop ring. At least one concave structure (9) is formed on the inner ring side wall of the magnetic collecting sheet, and at least one convex structure is formed on the circumferential outer wall of the fan blade. The convex structures on the fan blade are inserted into the concave structures of the magnetic collecting sheet in a one-to-one correspondence.

2. The fan blade with improved structure according to claim 1, characterized in that: The first stopper and the second stopper are both annular structures.

3. The fan blade with improved structure according to claim 1, characterized in that: The magnetic concentrating sheet and the fan blades are an integrally formed structure by in-mold injection molding.

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