A fan structure

Abstract

The present invention discloses a fan structure, including a base plate, a shaft tube, a side wall, an upper cover and a fan blade structure; the shaft tube is arranged on the base plate, and at least one coupling hole is formed through the base plate, and a plastic injection port of a mold is used for injection molding at the coupling hole to form a reinforcing column and a coupling base, and the coupling base is embedded in the coupling hole. After the plastic injection port of the mold is injected, a glue injection area will be formed on the lower surface of the coupling base, and the axis of the glue injection area along the up-down direction does not overlap with the axis of the reinforcing column along the up-down direction; along the radial direction with the axis of the shaft tube as the center of the circle, the axis of the glue injection area along the up-down direction is far away from the reinforcing column, and the axis of the reinforcing column along the up-down direction is far away from the glue injection area. The above fan structure design can improve the flatness of the lower surface of the coupling base located directly below the reinforcing column after injection molding, thereby improving the bonding strength between the reinforcing column and the base plate.

Description

Technical Field

[0001] The invention belongs to the technical field of heat dissipation fans, and in particular relates to a fan structure. Background Art

[0002] With the development of the electronics industry, the performance of electronic components has been continuously improved, the computing speed has become faster and faster, the number of internal chips has been increasing, and the heat generated by the chips when working has also increased accordingly. If it is not dissipated in time, it will damage the electronic components and affect the performance and service life. Therefore, the electronic components must be cooled.

[0003] In electronic devices with limited installation space such as laptop computers, centrifugal fans are usually installed near electronic components. The airflow generated by the rotation of the centrifugal fan blades is directly blown toward the electronic components or the heat sink installed on the electronic components, thereby effectively dissipating heat.

[0004] When an existing centrifugal fan uses a mold to inject glue to form a reinforcing column, the plastic combining hole of the mold is usually placed directly below the position of the pre-injected reinforcing column for glue injection. After injection molding, the plastic combining hole of the mold contacts the surface of the reinforcing column that is combined with the bottom plate of the centrifugal fan during injection molding, resulting in a glue injection area being formed on the surface that is combined with the bottom plate directly below the reinforcing column. The glue injection area is recessed into the interior of the reinforcing column, resulting in poor flatness on the surface directly below the reinforcing column after injection molding, thereby resulting in poor bonding strength between the reinforcing column and the bottom plate.

[0005] Therefore, in view of the above technical problems, it is necessary to provide a fan structure. Summary of the invention

[0006] The object of the present invention is to provide a fan structure which can effectively solve the above technical problems.

[0007] The technical solution provided by the present invention to solve the technical problem is as follows:

[0008] A fan structure, comprising:

[0009] a base plate, the base plate defining opposing upper and lower surfaces;

[0010] an axle tube, coupled to the upper surface of the base plate;

[0011] A side wall is formed by the upper surface edge of the bottom plate protruding upward;

[0012] An upper cover is combined with the side wall and is opposite to and spaced from the bottom plate, and the upper cover is penetrated by a perforation;

[0013] A combining hole is formed through the bottom plate;

[0014] A combining portion, integrally formed and combined with the combining hole, the combining portion comprising a combining base integrally combined in the combining hole and a reinforcing column extending above the upper surface of the bottom plate, the free end of the reinforcing column supporting the upper cover;

[0015] A glue-in area is formed on the lower surface of the combining base, and the axis of the glue-in area along the up-down direction does not overlap with the axis of the reinforcing column along the up-down direction.

[0016] Preferably, the reinforcing column forms a first projection area, the glue injection area forms a second projection area, and the first projection area does not overlap with the second projection area.

[0017] Preferably, along the up-down direction, the reinforcing column forms a first projection area, the glue injection area forms a second projection area, and the first projection area partially overlaps with the second projection area.

[0018] Preferably, along the radial direction with the axis of the shaft tube as the center, the axis of the glue entry area along the up-down direction is outside the first projection area.

[0019] Preferably, along the radial direction with the axis of the shaft tube as the center, the axis of the reinforcing column along the up-down direction is outside the second projection area.

[0020] Preferably, along the radial direction with the axis of the shaft tube as the center, there is a shortest distance A between the axis of the reinforcing column in the up and down direction and the second projection area, the first projection area has a maximum width B, and the ratio of the shortest distance A to the maximum width B is 0.1-0.4.

[0021] Preferably, along the radial direction with the axis of the shaft tube as the center, there is a shortest distance A between the axis of the reinforcing column in the up and down direction and the second projection area, the first projection area has a maximum width B, and the ratio of the shortest distance A to the maximum width B is 0.3-0.35.

[0022] Preferably, along the radial direction with the axis of the shaft tube as the center, at least one protrusion is formed on the bottom plate at the edge of the combining hole and protrudes into the combining hole. The protrusion is fixed integrally with the combining part, and along the up and down direction, the reinforcing column contacts the protrusion.

[0023] Preferably, the first projection area is circular and / or the second projection area is circular.

[0024] Preferably, the area of ​​the first projection area is larger than the area of ​​the second projection area.

[0025] Preferably, the thickness of the bottom plate along the up-down direction is not greater than 1.5 mm.

[0026] Preferably, the bottom plate is made of stainless steel, the thickness of the coupling base in the up-down direction is not less than the thickness of the bottom plate, and the fan structure further comprises a blade structure, which is rotatably coupled to the shaft tube.

[0027] The beneficial effects of the present invention are:

[0028] The axis of the glue entry area is designed to be offset from the axis of the reinforcing column, so that the lower surface of the bonding base located directly below the reinforcing column after injection molding is as flat as possible, thereby improving the bonding strength between the reinforcing column and the bonding base, and then improving the bonding strength between the reinforcing column and the base plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below in conjunction with the drawings and embodiments, in which:

[0030] Figure 1 A three-dimensional exploded schematic diagram of a fan structure disclosed in the present invention application;

[0031] Figure 2 for Figure 1 A schematic diagram of the structure of the base shown in FIG.

[0032] Figure 3 for Figure 2 a top view of the structure shown;

[0033] Figure 4 for Figure 3 The cross-sectional view along the CC line;

[0034] Figure 5 for Figure 3 The cross-sectional view along the DD line;

[0035] Figure 6 for Figure 2 a bottom view of the structure shown;

[0036] Figure 7 for Figure 4 An enlarged schematic diagram of the structure within the middle dotted circle E;

[0037] Figure 8 for Figure 6 An enlarged schematic diagram of the structure within the middle dotted circle F;

[0038] Fig. 9 for Figure 8 Schematic diagram of the joint in ;

[0039] Fig.10 for Fig. 9 Other embodiments of the joint are shown. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] In order to illustrate the technical solution of the present invention, the following is a description through specific embodiments. In the embodiments of the present invention, all directions involved are referred to as Figure 2 For reference, the direction perpendicular to the bottom plate 10 is defined as the up-down direction (i.e., the axial direction Y of the shaft tube 11). It is worth noting that the definitions of the directions in this specification are only for the convenience of explaining the embodiments of the present application, and do not limit the direction of the fan structure when in use.

[0042] See also Figures 1 to 9 As shown, a first embodiment of a fan structure 100 disclosed in the present application is shown, which includes a base 50 , a fan blade structure 40 and an upper cover 30 .

[0043] The base 50 has a bottom plate 10 and a side wall 20. The bottom plate 10 has an upper surface 101 and a lower surface 102 that are oppositely disposed. The side wall 20 is formed by the edge of the upper surface 101 of the bottom plate 10 protruding upward, and is formed with an air inlet 201 and an air outlet 202. The upper cover 30 is combined with and covers the air inlet 201 of the side wall 20, and is opposite to and spaced from the bottom plate 10. The upper cover 30 is provided with a through hole 301 corresponding to the air inlet 201. The bottom plate 10, the side wall 20 and the upper cover 30 are combined together to define a fan blade area S and a flow channel area L; wherein the fan blade structure 20 is disposed in the fan blade area S, and the position of the fan blade structure 20 is directly below the through hole 301.

[0044] Specifically, the upper cover 30 can be combined with the side wall 20 through a plurality of snap-fit ​​structures (not shown), and the outer circumference of the upper cover 30 matches that of the bottom plate 10 .

[0045] In this embodiment, the base plate 10 is a metal base plate, preferably made of stainless steel, and an axis tube 11 is provided on the base plate 10 at the central position of the fan blade area S. The axis tube 11 has an end protruding from the upper surface 101, and the end has an axis hole. The axis core of the fan blade structure 20 is placed in the axis hole of the axis tube 11, so that the fan blade structure 20 can be driven to rotate in the fan blade area S to drive the gas to flow and achieve the purpose of heat dissipation.

[0046] Specifically, at least one coupling hole 12 is formed through the bottom plate 10 within the flow channel area L, and plastic is injected into the coupling hole 12 through the plastic injection port of the mold (in short: injection molding) to form a coupling portion by integral injection molding, and the coupling portion includes a coupling base 14 integrally coupled to the coupling hole 12 and a reinforcing column 13 extending above the upper surface 101 of the bottom plate 10. The reinforcing column 13 is located in the flow channel area L. The free end of the reinforcing column 13 supports the upper cover 30 to reduce the degree of downward bending deformation of the upper cover 30 due to external force.

[0047] See also Figures 4 to 8 As shown, the combined base 14 is defined with an upper surface 141 and a lower surface 142 in the vertical direction, and the thickness of the combined base 14 in the vertical direction should not be less than the thickness of the bottom plate 10; therefore, in the present application, it is preferred that the upper surface 141 of the combined base 14 is flush with the upper surface 101 of the bottom plate 10, and the lower surface 142 of the combined base 14 is flush with the lower surface 102 of the bottom plate 10. The reinforcing column 13 is combined with the upper surface 141 of the combined base 14.

[0048] In the present embodiment, after plastic is injected into the combining hole 12 through the plastic injection port of the mold, a glue entry area 15 (or injection port) is formed on the lower surface 142 of the injection-molded combining base 14. During injection molding, in order to ensure uniform flow of plastic, the plastic injection port of the mold injects plastic into the combining hole 12 along the up-down direction; therefore, the axis of the plastic injection port of the mold along the up-down direction is the axis Q2 of the glue entry area 15 along the up-down direction. Along the up-down direction, the projection of the glue entry area 15 forms a second projection area V. The shape of the second projection area V can be a polygonal shape such as a triangle or a quadrilateral, or a circle or an ellipse. In the present application, the shape of the second projection area V is preferably a circle (such as Figure 8 As shown), the center of the second projection area V is the projection of the axis Q2 of the glue injection area 15 in the up and down direction.

[0049] Specifically, the reinforcing column 13 has an axis Q1 along the up-down direction, and the axis Q1 of the reinforcing column 13 and the axis Q2 of the glue injection area 15 are arranged to be non-overlapping.

[0050] Specifically, along the radial direction X with the axis of the shaft tube 11 as the center, the axis Q2 of the glue-in area 15 is away from the reinforcing column 13, and / or the axis Q1 of the reinforcing column 13 is away from the glue-in area 15. In the present application, it is preferred that the axis Q2 of the glue-in area 15 is away from the reinforcing column 13, and the axis Q1 of the reinforcing column 13 is away from the glue-in area 15 (e.g. Figure 7 shown).

[0051] In this embodiment, by limiting the position of the fan structure, the reinforcing column 13 is injected with glue at the side of the reinforcing column 13 (i.e., at or outside the peripheral position of the reinforcing column) during injection molding, and the position directly below the reinforcing column 13 is avoided. The lower surface 142 of the joint base 14 directly below the reinforcing column 13 after injection molding is as flat as possible (e.g., Figure 8 As shown), the bonding strength between the reinforcing column 13 and the base plate 10 is improved, so that the supporting strength of the reinforcing column 13 is improved, thereby improving the structural strength of the fan.

[0052] Specifically, along the up-down direction, the reinforcing column 13 is projected to form a first projection area W, and the shape of the first projection area W is circular or elliptical, so the center of the first projection area W is the projection of the axis Q1 of the reinforcing column 13 in the up-down direction.

[0053] See also Figure 8 and Fig. 9 As shown, in the present embodiment, there is a partially overlapping area U between the first projection area W and the second projection area V, and the researchers found in the design and experimental verification that when the area U where the first projection area W and the second projection area V partially overlap is larger, the surface of the lower surface 142 of the combined base 14 located directly below the reinforcing column 13 is more uneven, and the bonding strength between the reinforcing column 13 and the bottom plate 10 is worse; at the same time, when the area U where the first projection area W and the second projection area V partially overlap is smaller, the surface of the lower surface 142 of the combined base 14 located directly below the reinforcing column 13 is as flat as possible, that is, the bonding strength between the reinforcing column 13 and the bottom plate 10 is better; furthermore, when the thickness of the bottom plate 10 is thinner, that is, the thickness of the combined base 14 in the up-down direction after injection molding (the distance between the upper surface 141 and the lower surface 142 of the combined base 14) is less than or equal to 1.5 mm, the smaller the area U where the first projection area W and the second projection area V partially overlap is, the worse the fluidity of the plastic during injection molding is.

[0054] Specifically, the area of ​​the first projection area W is larger than the area of ​​the second projection area V, so as to further reduce the uneven surface generated in the glue injection area.

[0055] See also Fig. 9As shown, the first projection area W has a maximum width B (i.e., the reinforcing column 13 has a maximum diameter), and there is a minimum spacing A between the axis Q1 of the reinforcing column 13 and the glue-in area 15 (in this embodiment, it is the shortest distance from the center of the first projection area W to the second projection area V). The researchers found in experimental verification that when the ratio between the shortest spacing A and the maximum width B is 0.1-0.4, that is, during injection molding, the plastic has better fluidity, and the uneven surface generated in the glue-in area has less effect on the structural strength of the reinforcing column 13. At this time, the structural strength of the reinforcing column 13 itself and the bonding strength with the base plate 10 are better; at the same time, the researchers also found that when the ratio of the shortest spacing A to the maximum width B is 0.3-0.35, the effect is better.

[0056] In the present application, the shape of the coupling hole 12 is not limited (eg Fig.10 (a) Fig.10 (b) Fig.10 (c) Fig.10 (e)); wherein a preferred implementation is as follows Fig.10 (b) Fig.10 (c) and Fig.10 (d), that is, two protrusions 121 protrude inwardly from the edge of the coupling hole 12 on the base plate 10, and the two protrusions 121 are symmetrically arranged. During injection molding, the coupling base 14 is also formed with two inner recesses 143, and the two inner recesses 143 are respectively meshed and fixed with the two protrusions 121; furthermore, the reinforcing column 13 of the present embodiment is coupled to the upper surface 141 of the coupling base 14, and the reinforcing column 13 is also arranged in contact with the two inner recesses 143 (that is, along the up and down directions, the reinforcing column 13 is also in contact with the two protrusions 121), so as to enhance the coupling strength between the coupling base 14 and the coupling hole 12, that is, to enhance the coupling strength between the reinforcing column 13 and the base plate 10, so as to achieve the best effect.

[0057] In another embodiment of the present embodiment, different from the present embodiment, the first projection area W and the second projection area V have no overlapping area in the up and down direction (eg Fig.10 (f)), therefore, the position range of the glue entry area 15 on the lower surface 142 of the bonding base 14 does not overlap with the first projection area W of the reinforcing column 13 along the vertical direction. Since the thickness of the bottom plate 10 is relatively thin, the fluidity of the plastic during injection molding is relatively poor, that is, the molding process is relatively slow, but since the lower surface 142 of the bonding base 14 located directly below the reinforcing column 13 after injection molding is the flattest, the bonding strength between the reinforcing column 13 and the bottom plate 10 is also improved.

[0058] In summary, the present invention discloses a fan structure, which injects glue on the side of the reinforcement column (i.e., at the peripheral position or outside the reinforcement column) during the injection molding of the reinforcement column, avoiding the position directly below the reinforcement column, so that the lower surface of the bonding base of the reinforcement column located directly below the reinforcement column after injection molding is as flat as possible, thereby improving the bonding strength between the reinforcement column and the base plate.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0060] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. A fan structure, characterized in that: include: a base plate, the base plate defining opposing upper and lower surfaces; an axle tube, coupled to the upper surface of the base plate; A side wall is formed by the upper surface edge of the bottom plate protruding upward; An upper cover is combined with the side wall and is opposite to and spaced from the bottom plate, and the upper cover is penetrated by a perforation; A combining hole is formed through the bottom plate; A combining portion, integrally formed and combined with the combining hole, the combining portion comprising a combining base integrally combined in the combining hole and a reinforcing column extending above the upper surface of the bottom plate, the free end of the reinforcing column supporting the upper cover; A glue-in area is formed on the lower surface of the combining base, and the axis of the glue-in area along the up-down direction does not overlap with the axis of the reinforcing column along the up-down direction.

2. A fan structure according to claim 1, characterized in that: Along the up-down direction, the reinforcing column forms a first projection area, and the glue injection area forms a second projection area, and the first projection area does not overlap with the second projection area.

3. A fan structure according to claim 1, characterized in that: Along the up-down direction, the reinforcing column forms a first projection area, and the glue injection area forms a second projection area, and the first projection area partially overlaps the second projection area.

4. A fan structure according to claim 3, characterized in that: Along the radial direction with the axis of the shaft tube as the center of the circle, the axis of the glue entry area along the up-down direction is outside the first projection area.

5. A fan structure according to claim 4, characterized in that: Along the radial direction with the axis of the shaft tube as the center of the circle, the axis of the reinforcing column along the up-down direction is outside the second projection area.

6. A fan structure according to claim 5, characterized in that: Along the radial direction with the axis of the shaft tube as the center, there is a shortest distance A between the axis of the reinforcing column along the up and down direction and the second projection area, and the first projection area has a maximum width B. The ratio of the shortest distance A to the maximum width B is 0.1-0.

4.

7. A fan structure according to claim 5, characterized in that: Along the radial direction with the axis of the shaft tube as the center, there is a shortest distance A between the axis of the reinforcing column along the up and down direction and the second projection area, and the first projection area has a maximum width B. The ratio of the shortest distance A to the maximum width B is 0.3-0.

35.

8. A fan structure according to any one of claims 1 to 7, characterized in that: Along the radial direction with the axis of the shaft tube as the center of the circle, at least one protrusion is formed on the bottom plate at the edge of the combining hole and protrudes into the combining hole. The protrusion is fixed integrally with the combining part, and along the up and down direction, the reinforcing column contacts the protrusion.

9. A fan structure according to any one of claims 2 to 7, characterized in that: The first projection area is circular and / or the second projection area is circular.

10. A fan structure according to any one of claims 2 to 7, characterized in that: The area of ​​the first projection area is greater than the area of ​​the second projection area.

11. A fan structure according to claim 1, characterized in that: The thickness of the bottom plate along the up-down direction is not greater than 1.5 mm.

12. A fan structure according to claim 1, characterized in that: The bottom plate is made of stainless steel, the thickness of the combined base along the up-down direction is not less than the thickness of the bottom plate, and the fan structure also includes a blade structure, which is rotatably combined with the shaft tube.

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