Fan frame and fan with same

Abstract

A fan frame is used for solving the problem that a metal plate of an existing fan frame is prone to being extruded and deformed. Comprising a metal plate which is provided with at least one notch, and the at least one notch is located at the edge of the metal plate; the frame is formed on the edge of the metal plate in an injection molding manner, the frame is provided with at least one gap, the position of the at least one gap corresponds to the at least one notch of the metal plate, the frame is divided into a plurality of side wall parts by taking the at least one gap as a boundary, and the range of the at least one gap is not overlapped on the component of the metal plate. The invention further discloses a fan with the fan frame. Therefore, the effects of dispersing stress and avoiding deformation of the fan frame metal plate can be achieved.

Description

Technical Field

[0001] The invention relates to an outer frame component, in particular to a fan frame which disperses the coating injection stress to avoid base deformation. Background Art

[0002] In the existing heat dissipation fan, a frame is formed by injection molding on a metal base. A fan wheel can be arranged in the space surrounded by the frame, and a top cover can be combined with the upper edge of the frame to accommodate the fan wheel.

[0003] However, system cooling fans used in narrow spaces must be thin and lightweight, which results in the base or cover being squeezed by the stress of the frame when the frame is injection molded. In particular, the stress is easily concentrated in the bending section of the frame, causing the base or cover to be subjected to uneven stress distribution and extrusion deformation, resulting in an uneven surface of the base or cover. In addition, the thin fan limits the configuration space of the impeller, making the gap size between the impeller and the base and the cover smaller. If the surface of the base or the cover is uneven, the impeller will collide with the base or the cover when rotating, causing the fan to make noise and the fan to run unbalanced, shortening the service life of the existing cooling fan and reducing the fan operation efficiency.

[0004] In view of this, the fan frame of the existing heat dissipation fan still needs to be improved. Summary of the invention

[0005] In order to solve the above problems, an object of the present invention is to provide a fan frame which can prevent the metal plate from being squeezed and deformed.

[0006] Another object of the present invention is to provide a fan that can avoid collision and reduce noise during fan operation.

[0007] Another object of the present invention is to provide a fan that can improve the fan operation efficiency.

[0008] The directions or their approximate terms described throughout the present invention, such as "upper (top)", "lower (bottom)", "inner", "outer", "side", etc., mainly refer to the directions of the accompanying drawings. Each direction or its approximate terms are only used to assist in the explanation and understanding of the various embodiments of the present invention, and are not used to limit the present invention.

[0009] The elements and components described throughout the present invention use the quantifiers "a" or "an" only for convenience of use and to provide a general meaning of the scope of the present invention; in the present invention, they should be interpreted as including one or at least one, and a single concept also includes multiple situations, unless it is obvious that it means otherwise.

[0010] The similar terms such as "combination", "assembly" or "setting" described in the whole text of the present invention mainly include the connection that can be separated without damaging the components, or the connection that makes the components inseparable, which can be selected by technicians in this field according to the materials of the components to be connected or the assembly requirements.

[0011] The fan frame of the present invention includes: a metal plate having at least one notch, the at least one notch being located at the edge of the metal plate; and a frame injection-molded at the edge of the metal plate, the frame having at least one gap, the position of the at least one gap corresponding to the at least one notch of the metal plate, the frame being divided into a plurality of side wall portions with the at least one gap as a boundary, and the range of the at least one gap not overlapping with the components of the metal plate.

[0012] The fan of the present invention comprises: a fan frame as mentioned above, the metal plate being the base of the fan; a fan wheel located in the fan frame, the rotating shaft of the fan wheel being perpendicular to the plane of the metal plate; and an upper cover combined with one end of the frame relative to the metal plate.

[0013] The fan of the present invention comprises: the aforementioned fan frame, the metal plate being the upper cover of the fan; a base being combined with one end of the frame relative to the metal plate; and a fan wheel being located between the fan frame and the base, the rotating shaft of the fan wheel being perpendicular to the plane of the base.

[0014] Therefore, the fan frame and the fan having the fan frame of the present invention form a gap on the frame so that the stress of the frame when being formed on the metal plate can be dispersed, thereby preventing the metal plate from being unevenly squeezed and uneven during the process, preventing the fan wheel from colliding with the metal plate during operation, and ensuring the balanced operation of the fan wheel. The present invention has the effects of reducing the fan damage rate, improving the fan operation efficiency, and reducing the fan operation noise.

[0015] The at least one notch is located at an arc portion of the edge of the metal plate, and the at least one notch divides the arc of the arc portion into equal parts. Thus, each notch can evenly disperse the stress acting on the edge of the arc, thereby preventing the metal plate from being squeezed by stress concentration.

[0016] The at least one gap divides the frame into a plurality of separated side wall portions, so that each side wall portion can be separately injection molded on the metal plate, thereby having the effect of avoiding stress concentration.

[0017] The ends of two adjacent side wall portions are connected by a short wall, and the short wall is located in the gap between the two adjacent side wall portions. In this way, the adjacent side wall portions can be connected in alignment, which has the effect of avoiding misalignment when the frame is formed.

[0018] The low wall extends to the notch corresponding to the gap, and the low wall abuts against the edge of the notch. The height of the low wall is equal to the thickness of the metal plate, or is higher than the thickness of the metal plate by a difference, and the difference is less than or equal to 0.5 mm. In this way, the frame can be firmly formed on the metal plate by the low wall abutting against the notch, which has the effect of firmly combining the fan frame.

[0019] The ends of the two adjacent sidewalls form an interlaced and complementary L-shaped structure, and the gap between the two ends forms a Z-shape. In this way, the two adjacent sidewalls can be discontinuous, and the gap will not directly penetrate the frame, which has the effect of reducing airflow leakage.

[0020] The width of the gap is greater than or equal to 0.4 mm and less than or equal to 0.5 times the thickness of the frame. In this way, the frame can be injection molded to reach the lower limit of the gap width, and the upper limit of the gap width can disperse the stress caused by the frame, which has the effect of easy manufacturing and stress dispersion.

[0021] The airflow driven by the impeller flows in a direction along the inner wall of the frame, and the gap extends from the inner wall of the frame to the outer wall of the frame in a direction opposite to the direction of the airflow. In this way, the airflow can be reduced from leaking to the outside of the fan through the gap, which has the effect of improving the operating efficiency of the fan.

[0022] The upper cover has at least one extended bending portion, which extends from the edge of the upper cover toward the axial direction of the fan wheel shaft, and the position of the at least one extended bending portion corresponds to the at least one gap of the frame. In this way, the extended bending portion can cover the gap, which has the effect of reducing airflow leakage.

[0023] The ends of the adjacent two side walls do not overlap in the radial direction of the fan wheel shaft, the at least one gap forms a radial opening on the frame, and the at least one extended bent portion is inserted into the corresponding gap to cover the radial opening. In this way, the adjacent two side walls are easy to shape and form the gap, and the extended bent portion is easy to install in the gap, which has the effect of easy manufacturing and convenient installation.

[0024] The ends of the two adjacent side wall parts form a groove on the outer wall of the frame, so that the range of the gap forms a T-shape, and the extended bending part is inserted into the groove of the outer wall of the frame. In this way, the extended bending part covers the gap from the outer side of the frame, which is convenient for installation and reduces air leakage.

[0025] The ends of the two adjacent side wall parts form a groove on the inner wall of the frame, so that the range of the gap forms a T-shape, and the extended bending part is inserted into the groove of the inner wall of the frame. In this way, the extended bending part covers the gap from the inner side of the frame, which is convenient for installation and reduces air leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 : An exploded perspective view of a first embodiment of the present invention; Figure 2 : A partially exploded perspective view of a first embodiment of the present invention; Figure 3 : A partial assembly front view of the first embodiment of the present invention; Figure 4 :like Figure 3 The enlarged view of the local structure of area A is shown; Figure 5 :along Figure 4 BB line profile of; Figure 6 : An enlarged view of the local structure of the second embodiment of the present invention; Figure 7 :along Figure 6 CC line profile of ; Figure 8 :like Figure 6 Another partial structure enlargement shown Figure 1 ; Fig. 9 :like Figure 6 Another partial structure enlargement shown Figure 2 ; Fig.10 : An exploded perspective view of a third embodiment of the present invention; Fig.11 : A combined stereogram of a third embodiment of the present invention; Fig.12 :along Fig.11 DD line profile of; Fig.13 :along Fig.11 Another cross-sectional view of the DD line; Fig.14 : An exploded perspective view of a fourth embodiment of the present invention; Fig.15 :along Fig.14 Top view of the EE line.

[0027] Description of reference numerals: 1: Metal Plate 11: Straight line 12: Curved part 13: Gap 2: Border 21: Gap 21a: Groove structure 22: Side wall 22a: End 22b: Groove 23: Low Wall 3: Upper cover 31: Extended bending section 4: Fan wheel F: Fan S: Storage space T: Direction of travel W: Width D1,D2: Thickness H: Height. DETAILED DESCRIPTION

[0028] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the preferred embodiments of the present invention are specifically cited below and described in detail with reference to the accompanying drawings; in addition, those marked with the same symbols in different drawings are regarded as the same and their descriptions are omitted.

[0029] Please refer to Figure 1 As shown, it is the first embodiment of the fan frame of the present invention, including a metal plate 1 and a frame 2, the frame 2 is formed on the edge of the metal plate 1, in this embodiment, the metal plate 1 is the base of a fan F, a top cover 3 is combined with one end of the frame 2 relative to the metal plate 1, a fan wheel 4 can be arranged in the accommodating space S formed by the metal plate 1, the frame 2 and the top cover 3, and the rotating axis of the fan wheel 4 is preferably perpendicular to the plane of the metal plate 1, the axial direction of the fan frame is perpendicular to the plane of the metal plate 1 and parallel to the rotating axis, and the direction radiating outward from the center of the metal plate 1 or the rotating axis is radial; alternatively, the metal plate 1 can also be the top cover of the fan F, and has a base (not shown) combined with one end of the frame 2 relative to the metal plate 1, and a fan wheel 4 is located between the metal plate 1 and the base, and the rotating axis of the fan wheel 4 is perpendicular to the plane of the base.

[0030] Please refer to Figure 1 and Figure 2 As shown, the edge of the metal plate 1 can be divided into a straight line portion 11 and an arc portion 12. In this embodiment, the metal plate 1 is surrounded by three connected straight line portions 11 and one arc portion 12 to form a combination of a rectangle and a semicircle. However, the present invention is not limited to the shape of the metal plate 1. In addition, the metal plate 1 has at least one notch 13. The at least one notch 13 can be located in the straight line portion 11 or the arc portion 12. The at least one notch 13 is preferably located in the arc portion 12 and divides the arc of the arc portion 12 into two equal lengths. For example, in this embodiment, there is one notch 13 located in the arc portion 12, and the position of the notch 13 is the midpoint of the arc portion 12. The notch 13 divides the arc of the arc portion 12 into two equal lengths.

[0031] Please refer to Figure 2 and Figure 3As shown, the frame 2 is located on the straight portion 11 and the curved portion 12 of the metal plate 1. The frame 2 can be formed by injection molding on the edge of the metal plate 1. The frame 2 has at least one gap 21. The position of the at least one gap 21 corresponds to the at least one notch 13 of the metal plate 1. The at least one gap 21 disconnects the frame 2 so that the frame 2 forms a plurality of separated side wall portions 22, which can disperse the stress of each side wall portion 22 injection molded on the metal plate 1.

[0032] Please refer to Figure 3 ~ Figure 5 As shown, in this embodiment, the ends 22a of the two adjacent side wall portions 22 can form a complementary L-shaped structure. Figure 4 As shown, the gap 21 is separated by two inverted L-shaped structures, and the gap 21 is formed into a Z-shape by staggering the two adjacent ends 22a, which has the effect of reducing the leakage of the fan airflow. Please refer to Figure 5 , the axial section of the gap 21 and the two ends 22a, the gap 21 corresponds to the notch 13 of the metal plate 1, so that the range of the gap 21 does not overlap the component of the metal plate 1. Among them, the width W of the gap 21 is preferably greater than or equal to 0.4 mm and less than or equal to 0.5 times the thickness D1 of the frame 2, so that the gap 21 can disperse the stress caused by the frame 2 and facilitate injection molding of the frame 2.

[0033] In addition, the impeller 4 rotates in the accommodating space S to drive the airflow to flow in a travel direction T along the inner wall of the frame 2; at this time, preferably, the gap 21 as a whole extends from the inner wall of the frame 2 (i.e., the side close to the accommodating space S) toward the outer wall of the frame 2 (i.e., the side away from the accommodating space S) in a direction (from inside to outside) that is opposite to the travel direction T of the airflow, which can reduce the situation where the airflow leaks to the outside of the fan through the gap 21.

[0034] Please refer to Figure 3 , Figure 6 and Figure 7As shown, it is a second embodiment of the fan frame of the present invention. This embodiment is roughly the same as the first embodiment mentioned above. In this embodiment, the ends 22a of the two adjacent side wall portions 22 are connected by a short wall 23, so that the gap 21 does not completely disconnect the frame 2, which has the effect of avoiding misalignment of the frame during molding, that is, the gap 21 forms a groove structure 21a on the frame 2, wherein the short wall 23 is located in the gap 21 between the two adjacent side wall portions 22, and extends to the notch 13 of the metal plate 1 corresponding to the gap 21, and the height H of the short wall 23 is aligned with the thickness D2 of the metal plate 1, or is higher than the thickness D2 by a difference, and the difference is preferably less than or equal to 0.5 mm, so that the short wall 23 can abut the edge of the notch 13 to firmly combine the frame 2 and the metal plate 1; and the range of the gap 21 is only overlapped with the short wall 23, and does not overlap with the components of the metal plate 1.

[0035] Please refer to Figure 8 and Fig. 9 As shown, it is another embodiment of the range of the gap 21. The range of the gap 21 can also be a V-shape, an oblique straight line, etc., wherein an extension direction of the gap 21 from the inner wall of the frame 2 to the outer wall of the frame 2 is also opposite to the travel direction T of the airflow.

[0036] Please refer to Fig.10 and Fig.11 As shown, it is a third embodiment of the fan frame of the present invention. This embodiment is substantially the same as the first embodiment described above. In this embodiment, the at least one gap 21 of the frame 2 simultaneously disconnects the frame 2 in the axial and radial directions, so that the ends 22a of the two side walls 22 on both sides of the at least one gap 21 do not overlap in the radial direction. In addition, the upper cover 3 has at least one extended bending portion 31, the position of the at least one extended bending portion 31 corresponds to the at least one gap 21 of the frame 2, and the at least one extended bending portion 31 is bent from the edge of the upper cover 3 to extend axially, as shown in FIG. Fig.11 As shown, when the upper cover 3 is combined with the frame 2, the at least one extended bending portion 31 can cover the radial opening of the corresponding gap 21 on the frame 2, which can reduce the situation where the airflow leaks to the outside of the fan through the gap 21.

[0037] Please refer to Fig.11 , Fig.12 and Fig.13 As shown, the at least one extended bending portion 31 is located within the range of the corresponding gap 21, so that the extended bending portion 31 can be inserted into the gap 21. Fig.12 As shown, the ends 22a of the two adjacent side wall portions 22 form a groove 22b on the outer wall of the frame 2, so that the range of the gap 21 forms a T-shape, and the extended bending portion 31 is inserted into the outer wall of the frame 2; and as shown Fig.13As shown, the two ends 22a can also form grooves 22b on the inner wall of the frame 2, so that the range of the gap 21 forms a reverse T-shape, and the extended bending portion 31 is inserted into the inner wall of the frame 2. The extended bending portion 31 is inserted and covers the gap 21, which is convenient for installation and reduces air leakage.

[0038] Please refer to Fig.14 and Fig.15 As shown, it is the fourth embodiment of the fan frame of the present invention. This embodiment is roughly the same as the third embodiment mentioned above. In this embodiment, the ends 22a of the two side wall portions 22 on both sides of the at least one gap 21 are connected by a low wall 23, so that the gap 21 does not completely disconnect the frame 2, that is, the gap 21 forms a groove structure 21a on the frame 2, wherein the low wall 23 is located in the gap 21 between the two adjacent side wall portions 22, and extends to the notch 13 of the metal plate 1 corresponding to the gap 21, so that the low wall 23 abuts against the edge of the notch 13, and the range of the gap 21 only overlaps the low wall 23, but not on the component of the metal plate 1; and the height of the low wall 23 is the same as that of the second embodiment mentioned above.

[0039] To sum up, the fan frame and the fan having the fan frame of the present invention form a gap on the frame so that the stress of the frame when being formed on the metal plate can be dispersed, thereby preventing the metal plate from being unevenly squeezed during the process and causing unevenness, and can prevent the fan wheel from colliding with the metal plate and ensure the balanced operation of the fan wheel. The present invention has the effects of reducing the fan damage rate, improving the fan operation efficiency and reducing the fan operation noise.

[0040] Although the present invention has been disclosed using the above-mentioned preferred embodiments, they are not intended to limit the present invention. Any person skilled in the art may make various changes and modifications to the above-mentioned embodiments without departing from the spirit and scope of the present invention, and the technical scope protected by the present invention is still within the scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to the claims.

Claims

1. A fan frame, characterized in that: include: A metal plate having at least one notch, wherein the at least one notch is located at an edge of the metal plate; and A frame is injection molded on the edge of the metal plate, the frame has at least one gap, the position of the at least one gap corresponds to the at least one notch of the metal plate, the frame is divided into several side wall parts by the at least one gap, and the range of the at least one gap does not overlap on the component of the metal plate.

2. The fan frame according to claim 1, characterized in that: The at least one notch is located at an arc portion of the edge of the metal plate, and the at least one notch divides the arc of the arc portion into equal parts.

3. The fan frame according to claim 1, characterized in that: The at least one gap divides the frame into a plurality of separated side wall portions.

4. The fan frame according to claim 1, characterized in that: The ends of two adjacent side wall parts are connected by a short wall, and the short wall is located in the gap between the two adjacent side wall parts.

5. The fan frame according to claim 4, characterized in that: The short wall extends to the notch corresponding to the gap, and the short wall abuts against the edge of the notch. The height of the short wall is aligned with the thickness of the metal plate, or is higher than the thickness of the metal plate by a step difference, and the step difference is less than or equal to 0.5 mm.

6. The fan frame according to claim 1, characterized in that: The ends of two adjacent side wall portions form an L-shaped structure that is staggered and complementary, and the gap range between the two ends forms a Z-shape.

7. The fan frame according to claim 1, characterized in that: The width of the gap is greater than or equal to 0.4 mm and less than or equal to 0.5 times the thickness of the frame.

8. A fan, characterized in that: include: A fan frame according to any one of claims 1 to 7, wherein the metal plate is a base of the fan; a fan wheel located in the fan frame, the rotation axis of the fan wheel being perpendicular to the plane of the metal plate; and An upper cover is combined with one end of the frame opposite to the metal plate.

9. The fan according to claim 8, characterized in that The airflow driven by the impeller flows along the inner wall of the frame in a moving direction, and the gap extends from the inner wall of the frame toward the outer wall of the frame in a direction opposite to the moving direction of the airflow.

10. The fan according to claim 8, characterized in that The upper cover has at least one extending bent portion, which is bent and extended from the edge of the upper cover toward the axial direction of the fan wheel shaft, and the position of the at least one extending bent portion corresponds to the at least one gap of the frame.

11. The fan according to claim 10, characterized in that The ends of two adjacent side wall portions do not overlap in the radial direction of the fan wheel shaft, the at least one gap forms a radial opening on the frame, and the at least one extended bending portion is inserted in the corresponding gap to cover the radial opening.

12. The fan according to claim 11, characterized in that The ends of two adjacent side wall parts form a groove on the outer wall of the frame, so that the range of the gap forms a T-shape, and the extended bending part is inserted into the groove of the outer wall of the frame.

13. The fan according to claim 11, characterized in that The ends of two adjacent side wall parts form a groove on the inner wall of the frame, so that the range of the gap forms a T-shape, and the extended bending part is inserted into the groove of the inner wall of the frame.

14. A fan, characterized in that: include: A fan frame according to any one of claims 1 to 7, wherein the metal plate is an upper cover of the fan; a base, coupled to an end of the frame opposite to the metal plate; and A fan wheel is located between the fan frame and the base, and the rotating axis of the fan wheel is perpendicular to the plane of the base.

15. The fan according to claim 14, characterized in that The airflow driven by the impeller flows along the inner wall of the frame in a moving direction, and the gap extends from the inner wall of the frame toward the outer wall of the frame in a direction opposite to the moving direction of the airflow.

16. The fan according to claim 14, characterized in that The upper cover has at least one extending bent portion, which is bent and extended from the edge of the upper cover toward the axial direction of the fan wheel shaft, and the position of the at least one extending bent portion corresponds to the at least one gap of the frame.

17. The fan according to claim 16, characterized in that The ends of two adjacent side wall portions do not overlap in the radial direction of the fan wheel shaft, the at least one gap forms a radial opening on the frame, and the at least one extended bending portion is inserted in the corresponding gap to cover the radial opening.

18. The fan according to claim 17, characterized in that The ends of two adjacent side wall parts form a groove on the outer wall of the frame, so that the range of the gap forms a T-shape, and the extended bending part is inserted into the groove of the outer wall of the frame.

19. The fan according to claim 17, characterized in that The ends of two adjacent side wall parts form a groove on the inner wall of the frame, so that the range of the gap forms a T-shape, and the extended bending part is inserted into the groove of the inner wall of the frame.

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