TW201638478A - Fan frame and metal fixing base - Google Patents

Abstract

A fan frame and the metal fixing base thereof are used for solving the problem about the radial width and the axis height reduced difficultly of the former fan frame. The fan frame has a metal fixing base and a plastic body. A plurality of fixing rib disposes on the outside edge of the metal fixing base. The plurality of fixing rib is protruding and each has a first combining face and a second combining face correspondingly. The second combining face forms a concave part. The plastic body is integrating and covers to the outer circumference of the metal fixing base. The plastic body combines with the first combining face of the fixing rib of the metal fixing base. The concave part combines with the second combining face of the fixing rib of the metal fixing base.

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; the plastic frame integrally covers the outer periphery of the metal holder, and the plastic The frame is coupled to the first joint surface of the positioning rib of the metal holder, and the second joint surface of the positioning rib coupled to the metal holder via the recess.

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.

Wherein, the positioning rib is provided with a notch penetrating the first joint surface and the second joint surface, so that the positioning rib is divided into two ribs, and the two ribs extend obliquely in opposite directions and protrude from the metal The first surface of the fixing frame, and the ends of the two convex ribs are opposite to form the notch.

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.

Wherein the extension of the two ribs is parallel to the first of the metal holders surface.

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 includes at least one metal. The fixing frame 1 and a plastic frame 2 are provided. The plastic frame 2 can be combined with the metal holder 1; the metal holder 1 can be combined with components such as a stator and a fan wheel (not shown) to form a heat dissipation 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 opposite to each other 12, the first surface 11 is provided with a shaft joint portion 13, which can be coupled by a shaft tube 131. 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 .

Also, please refer to the above-mentioned metal holder 1 as shown in Figures 6 and 7. A plurality of positioning ribs 14 are disposed on the periphery, and the plurality of positioning ribs 14 can be convexly formed from the second surface 12 toward the first surface 11 by a machining process, and the machining method can be easy to process such as stamping. Processing methods. 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 Figures 5 and 8, the plastic frame 2 is integrally covered with the gold. The outer peripheral edge of the fixing frame 1 , and the plastic frame 2 is coupled to the first bonding surface 141 of the positioning rib 14 of the metal holder 1 and the positioning rib coupled to the metal holder 1 via the recess 15 The second bonding surface 142 of 14. 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 inside the plastic frame 2, and the accommodating space 23 communicates with the air inlet. 21 and the air outlet 22.

Please refer to FIG. 9 , when the fan frame of the present invention is actually used, the above 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 fan wheel 32 having a permanent magnet. The stator 31 and the fan wheel 32 are located in the plastic frame. The housing 2 accommodates a space 23, and the stator 31 can drive the fan wheel 32 to rotate, so as to introduce airflow from the air inlet 21, and then exhaust airflow from the air outlet 22, thereby forming a heat dissipation function. Fan 3.

Please refer to Figures 5 and 9 again, by setting the above several positioning ribs 14 The plastic frame 2 is placed on the outer periphery of the metal holder 1 so that the plastic frame 2 only needs to integrally cover the positioning ribs 14 on the outer periphery of the metal holder 1 to effectively reduce the radial width D of the fan frame of the present invention. Moreover, the design of the recessed portion 15 is formed by the plurality of positioning ribs 14 protruding from the second surface 12 of the metal holder 1 toward the first surface 11 to make the plastic frame 2 more The positioning rib 14 is integrally covered by the recessed portion 15, so that the axial height H of the fan frame of the present invention can also be effectively reduced.

Moreover, please refer to FIG. 9 again, by the design of the above-mentioned recessed portion 15, The bottom surface of the plastic frame 2 is preferably flush with the second surface 12 of the metal holder 1 to further reduce the axial height H of the fan frame of the present invention; therefore, the fan of the present invention can be more effectively reduced. The overall volume of the frame.

Also, please refer to Figures 6 and 7 for the positioning of the above metal holder 1 The second joint surface 142 of the rib 14 and the first surface 11 of the metal holder 1 form a first opening 14a and a second opening 14b opposite to each other in a radial direction perpendicular to the axial direction of the shaft tube 131. In the direction, the first opening 14a faces the inside of the plastic frame 2 (ie, the accommodating space 23), and the second opening 14b faces the outside of the plastic frame 2; thereby, as shown in FIG. 9, the first opening An opening 14a can be radially communicated between the accommodating space 23 and the recessed portion 15 (the position of the first opening 14a can be referred to the dotted line position on the left side of the recess 15 shown in FIG. 9) The second opening 14b can communicate with the outside of the plastic frame 2 and the recessed portion 15 in the radial direction (the position of the second opening 14b can be referred to the dotted line position on the right side of the recessed portion 15 shown in FIG. 9) The plastic material of the plastic frame 2 can be combined with the second opening 14b of the positioning rib 14 of the metal fixing frame 1 through the first opening 14a, the second opening 14b and the recess 15 to enhance the plastic material. The bonding stability between the metal holder 1 and the plastic frame 2 is mutually stable.

Moreover, the positioning rib 14 of the metal fixing frame 1 is provided for the plastic frame The shape of the body 2 is combined and does not fall 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 outer periphery of the metal holder of the fan frame of the present invention is provided. The plurality of positioning ribs and the plurality of positioning ribs 14 form the recessed portion 15 and the like, so as to effectively reduce the radial width and the axial height of the fan frame to effectively reduce the volume of the fan frame.

Although the present invention has been disclosed using the above preferred embodiments, it is not intended to be limiting The present invention is not limited to the spirit and scope of the present invention, and various modifications and modifications to the above embodiments are still within the technical scope of the present invention. The scope of protection is subject to the definition of the scope of the patent application.

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 (11)

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, the second bonding surface and the second surface have a height difference to form a recess; and a plastic frame, 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 the positioning convex portion coupled to the metal fixing frame via the concave portion The second joint surface of the rib. 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, second or third aspect of the invention, wherein the positioning rib is provided with a notch penetrating the first joint surface and the second joint 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 fan frame of claim 4, wherein the ends of the two ribs respectively form an extension, and the plastic frame simultaneously covers the extension of the two ribs. The fan frame of claim 5, wherein the extension of the two ribs is parallel to the first surface of the metal holder. The metal frame of the fan frame has a first surface and 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. The plurality of positioning ribs are convex from the second surface 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 and the The first surface is connected, 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 metal holder of the fan frame of the seventh 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 seventh or eighth aspect of the invention, wherein the positioning rib is provided with a notch extending through the first joint surface and the second joint surface, so that the positioning rib is distinguished. 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 metal holder of the fan frame of claim 9, wherein the ends of the two ribs respectively form an extension. The metal holder of the fan frame according to claim 10, wherein the extension of the two ribs is parallel to the first surface of the metal holder.