TWI598514B - Fan frame and metal fixing base - Google Patents

Description

Fan frame and its metal holder

The invention relates to a fan frame, in particular to a fan frame comprising a plastic frame and a metal holder which can be combined with each other.

Referring to Figures 1 and 2, a conventional fan frame 8 is disclosed. The fan frame 8 includes a metal holder 81 and a plastic frame 82. The metal holder 81 has a first surface 811 and a second surface 812. The first surface 811 is provided with a shaft portion 813 and a plurality of joint portions 814. The shaft portion 813 is located at the metal holder 81. The plurality of joint portions 814 are adjacent to the outer periphery of the metal holder 81, and the plurality of joint portions 814 are a plurality of ribs formed on the first surface 811; Therefore, the plastic frame 82 can be integrally formed on the outer periphery of the metal holder 81 and the plurality of joint portions 814 by injection molding, so that the plastic frame 82 and the metal holder 81 are coupled to each other to form the plastic frame 82. Fan frame 8. An embodiment similar to the conventional fan frame 8 has been disclosed in the Patent No. I447304 of the Republic of China on the "fan frame and the cooling fan having the fan frame".

The plastic frame 82 has an axial height H and a radial width D. When the plastic frame 82 is coupled to the metal holder 81, the plastic frame 82 simultaneously covers the first surface of the metal holder 81. 811 and the second surface 812. Therefore, the axial height H of the plastic frame 82 includes a height h of a plastic portion from the bottom of the plastic frame 82 to the second surface 812, resulting in an axial height of the plastic frame 82. H is not easy to be reduced; in addition, since the plastic frame 82 is coated with the outer periphery of the metal holder 81, it must be simultaneously wrapped in the gold. The plurality of joint portions 814 between the outer periphery of the holder 81 and the shaft portion 813. Therefore, the radial width D of the plastic frame 82 includes the inner circumference of the plastic frame 82 to the metal holder 81. The width d of a plastic portion on the outer periphery causes the radial width D of the plastic frame 82 to be not easily reduced. In general, when the plastic frame 82 and the metal holder 81 are combined to form the fan frame 8 , the volume of the fan frame 8 is not easily reduced, and the plastic frame 82 is also easy to waste excessive plastic material. .

Referring to Figures 3 and 4, another conventional fan frame 9 is disclosed. The fan frame 9 includes a metal holder 91 and a plastic frame 92. The metal holder 91 has a first surface 911 and a second surface 912 opposite to each other, and the outer periphery of the metal holder 91 is mechanically bent to form a plurality of positioning protrusions 913, and the positioning protrusions 913 are The second surface 912 extends toward the first surface 911. The plastic frame 92 can be integrally formed on the outer peripheral edge of the metal holder 91 by injection molding. The metal holder 91 is coupled to each other to constitute the fan frame 9. The plastic frame 92 can cover the first surface 911 of the metal holder 91 and the plurality of positioning protrusions 913. Therefore, the plastic frame 92 can omit the height of the plastic part as shown in FIG. h, the axial height H of the plastic frame 92 can be effectively reduced. An embodiment similar to the conventional fan frame 9 has been disclosed in the "Fan Frame Structure" patent of the Republic of China No. I353509.

However, the above-mentioned conventional fan frame 9 ensures that the above-mentioned plastic frame 92 is not allowed. It is intended that the metal holder 91 is axially detached. As shown in FIG. 3, the plurality of positioning protrusions 913 of the metal holder 91 must additionally process a through hole 914; or, as shown in FIG. 4, the metal The plurality of positioning protrusions 913 of the fixing frame 91 must separately process a hook portion 915 so that the plastic frame body 92 can simultaneously cover the through hole 914 or the hook portion 915 to provide an axial positioning effect. Therefore, the metal holder 91 has problems such as poor processing convenience and is still necessary for improvement.

The present invention provides a fan frame and a metal holder thereof, which can be used to reduce the radial width and axial height of the fan frame by a metal holder with good processing convenience.

The fan frame of the present invention comprises a metal holder and a plastic frame. The metal holder has a first surface and a second surface. The first surface is provided with a shaft portion. The outer periphery of the metal holder is provided with a plurality of positioning ribs. The plurality of positioning ribs are from the first The two surfaces are convex toward the first surface, and the plurality of positioning ribs each have a first first bonding surface and a second bonding surface, the first bonding surface being connected to the first surface, the second surface The bonding surface is connected to the second surface, and the second bonding surface and the second surface have a height difference to form a recess, and the positioning rib is disposed through the first bonding surface and the second bonding surface. a notch, the positioning rib is divided into two ribs, the two ribs extend obliquely in opposite directions and protrude from the first surface of the metal holder, and the ends of the two ribs are opposite to form the gap The plastic frame body integrally covers the outer periphery of the metal fixing frame, and the plastic frame body is coupled to the first bonding surface of the positioning rib of the metal fixing frame, and is coupled to the metal fixing frame via the recessed portion. Positioning the second joint surface of the rib.

The bottom surface of the plastic frame is flush with the second surface of the metal holder.

The second joint surface of the positioning rib of the metal fixing frame and the first surface of the metal holder form a first opening and a second opening, and the first opening faces the inside of the plastic frame The second opening faces the outside of the plastic frame.

The ends of the two ribs respectively form an extension, and the plastic frame covers the extension of the two ribs at the same time.

The extension of the two ribs is parallel to the first surface of the metal holder.

The fan frame of the present invention is provided with a plurality of positioning ribs on the outer periphery of the metal fixing frame, and the plurality of positioning ribs are formed into the recessed portion, thereby effectively reducing the radial width and the axial height of the fan frame. Achieve effective reduction of fan frame volume.

〔this invention〕

1‧‧‧Metal holder

11‧‧‧ first surface

12‧‧‧ second surface

13‧‧‧Axis joint

131‧‧‧ shaft tube

14‧‧‧ positioning ribs

14’‧‧‧ rib

14a‧‧‧first opening

14b‧‧‧second opening

141‧‧‧ first joint

142‧‧‧Second junction

143‧‧ ‧ gap

144‧‧‧Extension

15‧‧‧Depression

2‧‧‧Plastic frame

21‧‧‧Air inlet

22‧‧‧air outlet

23‧‧‧ accommodating space

3‧‧‧ cooling fan

31‧‧‧ Stator

32‧‧‧fan wheel

H‧‧‧ axial height

D‧‧‧ Radial width

T‧‧‧ height difference

[study]

8‧‧‧Fan frame

81‧‧‧Metal holder

811‧‧‧ first surface

812‧‧‧ second surface

813‧‧‧Axis joint

814‧‧‧Combination Department

82‧‧‧Plastic frame

9‧‧‧Fan frame

91‧‧‧Metal holder

911‧‧‧ first surface

912‧‧‧ second surface

913‧‧‧ Positioning convex plate

914‧‧‧through hole

915‧‧‧Hook

92‧‧‧Plastic frame

H‧‧‧Plastic part height

H‧‧‧ axial height

D‧‧‧Plastic part width

D‧‧‧ Radial width

Fig. 1 is a sectional view showing a combination of a conventional fan frame.

Fig. 2 is a perspective view of a metal holder of a conventional fan frame.

Fig. 3 is a partial sectional view showing another conventional fan frame seat with a through hole for a plastic frame.

Fig. 4 is a partial sectional view showing another conventional fan frame with a hook portion for plastic frame joining.

Fig. 5 is a perspective view showing the fan frame of the present invention.

Fig. 6 is a perspective view showing the metal holder of the fan frame of the present invention.

Figure 7 is a partial perspective view of the metal holder of the fan frame of the present invention.

Figure 8 is a bottom cross-sectional view of the fan frame of the present invention.

Figure 9 is a cross-sectional view showing the combination of the fan frame of the present invention applied to a cooling fan.

Fig. 10 is a partial perspective view showing the positioning rib of the metal holder of the fan frame of the present invention divided into two ribs.

Figure 11 is a partial perspective view showing the positioning rib of the metal holder of the fan frame of the present invention divided into two ribs and provided with an extension.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

Referring to Figures 5 and 6, the fan frame of the present invention comprises at least one metal holder 1 and a plastic frame 2. The plastic frame 2 can be coupled to the metal holder 1; the metal The fixing frame 1 can be combined with a member such as a stator and a fan wheel (not shown) to constitute a cooling fan. In this embodiment, the fan frame is a fan frame of the blast fan. The fan can be a fan frame of an axial fan or a fan frame of a horizontal convection fan. The invention is not limited.

The metal holder 1 has a first surface 11 and a second surface 12 opposite to each other. The first surface 11 is provided with a shaft portion 13 for a shaft tube 131 to be coupled. The shaft tube 131 can be a plastic shaft tube integrally coupled to the shaft portion 13 or the shaft tube 131 can be coupled to the shaft portion 13 by means of a joint; in the embodiment, the shaft portion 13 is A shaft hole having a plurality of positioning pieces, the shaft tube 131 is integrally coupled to the shaft portion 13 by injection molding and protrudes from the first surface 11 of the metal holder 1 .

Further, as shown in FIGS. 6 and 7, the plurality of positioning ribs 14 are provided on the outer periphery of the metal holder 1, and the plurality of positioning ribs 14 can be mechanically processed from the second surface 12 toward the above. The first surface 11 has a convex shape, and the machining method can be a processing method such as punching which is easy to process. Furthermore, the plurality of positioning ribs 14 each have a first connecting surface 141 and a second bonding surface 142. The first bonding surface 141 is connected to the first surface 11, and the second bonding surface 142 is The second surface 12 is connected, and the second bonding surface 142 and the second surface 12 have a height difference T, thereby forming a recess 15 .

Referring to FIGS. 5 and 8 , the plastic frame 2 integrally covers the outer periphery of the metal holder 1 , and the plastic frame 2 is coupled to the first joint surface of the positioning rib 14 of the metal holder 1 . 141 and a second joint surface 142 coupled to the positioning rib 14 of the metal fixture 1 via the recess 15 described above. The appearance of the plastic frame 2 can be a variety of different geometric shapes. The fan frame can be used as a cooling fan. The present invention is not limited. In this embodiment, the plastic frame 2 is provided with a The air inlet 21 and the air outlet 22 form an accommodating space 23 on the inner side of the plastic frame 2, and the accommodating space 23 communicates with the air inlet 21 and the air outlet 22.

As shown in FIG. 9, when the fan frame of the present invention is actually used, the outer peripheral wall of the shaft tube 131 of the metal holder 1 can be coupled with a stator 31, and the shaft tube 131 of the metal holder 1 can be combined with a permanent magnet. a fan 32, the stator 31 and the fan wheel 32 are located in the accommodating space 23 of the plastic frame 2, and the stator 31 can drive the fan wheel 32 to rotate, so as to introduce airflow from the air inlet 21, and then The air flow is taken out from the air outlet 22, thereby constituting a heat radiating fan 3 having a heat radiating function.

Referring to FIGS. 5 and 9 , the plurality of positioning ribs 14 are disposed on the outer periphery of the metal holder 1 , so that the plastic frame 2 only needs to be integrally wrapped around the metal holder 1 . Positioning the rib 14 on the outer circumference to effectively reduce the radial width D of the fan frame of the present invention; further, the plurality of positioning ribs 14 are from the second surface 12 of the metal holder 1 toward the first The surface 11 is raised to form the recessed portion 15 so that the plastic frame 2 can integrally cover the positioning rib 14 via the recessed portion 15. Therefore, the axial height of the fan frame of the present invention can be effectively reduced. H.

Moreover, referring to FIG. 9 , the bottom surface of the plastic frame 2 is preferably flush with the second surface 12 of the metal holder 1 by the design of the recess 15 to further reduce and reduce the present invention. The axial height H of the fan frame; therefore, the overall volume of the fan frame of the present invention can be more effectively reduced.

Further, referring to FIGS. 6 and 7, the second joint surface 142 of the positioning rib 14 of the metal holder 1 and the first surface 11 of the metal holder 1 form a first opening 14a. And a second opening 14b, the first opening 14a faces the inside of the plastic frame 2 (ie, the accommodating space 23) in a radial direction perpendicular to the axial direction of the shaft tube 131, and the second opening 14b faces The first opening 14a is radially connected to the accommodating space 23 and the recess 15 (the position of the first opening 14a is contiguous). Referring to the dotted line position on the left side of the recessed portion 15 shown in FIG. 9 , the second opening 14 b may be radially connected to the outside of the plastic frame 2 and the depressed portion 15 (the position of the second opening 14b can be referred to the position of the dotted line on the right side of the recess 15 shown in FIG. 9), and the plastic material of the plastic frame 2 can pass through the first opening 14a and the second opening 14b at the same time. The recessed portion 15 and the second joint surface 142 of the positioning rib 14 of the metal holder 1 are coupled to each other to enhance the bonding stability between the metal holder 1 and the plastic frame 2.

Moreover, the positioning rib 14 of the metal holder 1 is based on the principle that the plastic frame 2 can be joined without falling off, and the appearance of the positioning rib 14 is not limited. For example, as shown in FIG. 10, the positioning rib 14 can also be provided with a notch 143 extending through the first joint surface 141 and the second joint surface 142, so that the positioning rib 14 can be distinguished as a relative Two ribs 14' extending obliquely in opposite directions to protrude from the first surface 11 of the metal holder 1, and the ends of the two ribs 14' (ie, at one end of the notch 143) The plastic ribs of the plastic frame 2 can cover the positioning ribs 14 of the metal holder 1 (ie, the two ribs 14 ′). Further, the amount of metal material used in the metal holder 1 is saved. Alternatively, as shown in FIG. 11, the ends of the two ribs 14' may also respectively form an extension 144 which is parallel to the first surface 11 of the metal holder 1 when the plastic frame 2 is wrapped. When the two ribs 14' are covered, the extension 144 can be used to provide a better axial anti-shedding effect of the plastic frame 2.

In summary, the plurality of positioning ribs are disposed on the outer periphery of the metal holder of the fan frame of the present invention, and the plurality of positioning ribs 14 form the recess 15 and the like, thereby effectively reducing the diameter of the fan frame The width and axial height are used to effectively reduce the volume of the fan frame.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

1‧‧‧Metal holder

11‧‧‧ first surface

12‧‧‧ second surface

13‧‧‧Axis joint

131‧‧‧ shaft tube

14‧‧‧ positioning ribs

14a‧‧‧first opening

14b‧‧‧second opening

141‧‧‧ first joint

142‧‧‧Second junction

15‧‧‧Depression

2‧‧‧Plastic frame

21‧‧‧Air inlet

22‧‧‧air outlet

23‧‧‧ accommodating space

Claims (9)

A fan frame includes: a metal holder having a first surface and a second surface, the first surface is provided with a shaft portion, and the outer periphery of the metal holder is provided with a plurality of positioning a plurality of positioning ribs protruding from the second surface toward the first surface, the plurality of positioning ribs each having a first first bonding surface and a second bonding surface, the first bonding The surface is connected to the first surface, the second bonding surface is connected to the second surface, and the second bonding surface and the second surface have a height difference to form a recess, the positioning rib is provided a notch is formed through the first bonding surface and the second bonding surface, so that the positioning rib is divided into two ribs, and the two ribs extend obliquely in opposite directions and protrude from the first surface of the metal holder, and The ends of the two ribs are opposite to each other to form the notch; and a plastic frame integrally covering the outer periphery of the metal holder, and the plastic frame is coupled to the positioning rib of the metal holder First joint surface, and through the above depression Binding to the second binding surface of the positioning rib of the metal holder. The fan frame of claim 1, wherein the bottom surface of the plastic frame is flush with the second surface of the metal holder. The fan frame of claim 1, wherein the second joint surface of the positioning rib of the metal holder and the first surface of the metal holder form a first opening and a first The second opening faces the inside of the plastic frame, and the second opening faces the outside of the plastic frame. The fan frame of the first aspect of the invention, wherein the ends of the two ribs respectively form an extension, and the plastic frame covers the extension of the two ribs at the same time. The fan frame of claim 4, wherein the extension of the two ribs is parallel to the first surface of the metal holder. a metal holder for a fan frame having a first surface opposite to a second surface, the first surface is provided with a shaft connecting portion, and the outer periphery of the metal fixing frame is provided with a plurality of positioning ribs, and the plurality of positioning ribs are convex from the second surface toward the first surface. Each of the plurality of positioning ribs has a first joint surface and a second joint surface. The first joint surface is connected to the first surface, and the second joint surface is connected to the second surface. a height difference is formed between the second bonding surface and the second surface to form a recessed portion, the positioning rib is provided with a notch penetrating the first bonding surface and the second bonding surface, so that the positioning rib is divided into two a rib extending obliquely in opposite directions and protruding from the first surface of the metal holder, and the ends of the two ribs are opposite to form the gap. The metal holder of the fan frame of the sixth aspect of the invention, wherein the second joint surface of the positioning rib of the metal holder and the first surface of the metal holder form a first one An opening and a second opening. The metal holder of the fan frame of the sixth aspect of the invention, wherein the ends of the two ribs respectively form an extension. The metal holder of the fan frame of claim 8, wherein the extension of the two ribs is parallel to the first surface of the metal holder.