JP5368877B2 - Miniature fan - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the entire height in axial direction and reduce complexity in structure by aligning a coil assembly in a substrate, to prevent a coil structure from being formed between a fan and a surface layer of the substrate. <P>SOLUTION: A frame 10 includes a substrate 20 and a fan 30. A placement part 12 is formed at the frame 10, and a shaft bearing 13 is provided to the placement part 12. The substrate 20 is connected to the placement part 12 of the frame 10. A surface layer 21 is formed on the substrate 20. A coil assembly 23 is formed on one side surface of the surface layer 21. The coil assembly 23 is so formed as to be electrically connected to a drive circuit. The fan 30 is provided with a central shaft 311 and a permanent magnet 32. The central shaft 311 is connected to the shaft bearing 13 of the frame 10. The permanent magnet 32 is so configured as to face the coil assembly 23 each other. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a heat radiating fan, and more particularly to a miniature fan that can reduce the overall axial height and reduce the volume.

  As a structure of a conventional heat radiating fan, for example, in Chinese publication number 200610072272.8 “Thin heat radiating mechanism”, referring to FIGS. 5 and 6, the conventional heat radiating fan 8 includes a frame 81. A cover plate 82 is provided above the frame 81, and an accommodation space 811 is formed in the frame 81. A base 812 is formed in the accommodation space 811, and the base 812 is used to install the insulation 83 and the coil 84. In addition, at least two or more positioning members 85 are provided on the base 812, and a shaft tube 813 is provided at the center of the base 812 so that the rotor 86 can be accommodated in the housing space of the frame 81 by the shaft tube 813. 811. Among them, a magnet 861 is formed inside the rotor 86, thereby causing a magnetic flux linkage between the coil 84 and the magnet 861, so that the rotor 86 is operated to rotate in conjunction with it. can do. Thus, there is one that can provide a heat radiating action by attaching the conventional heat radiating fan 8 to various electronic devices or electronic devices (see Patent Document 1).

  Further, as the structure of a conventional heat radiating fan, for example, referring to FIGS. 93 and shaft rod 94 are included. The base 91 is provided with a shaft hole 911 and a coil set 912. The fan hosel 92 is formed with a plurality of bent blades 921. The single magnet 93 is coupled to the bottom of the fan hosel 92. One end of the shaft rod 94 is fitted into the shaft hole 911 of the base 91, and the other end of the shaft rod 94 is coupled to the fan hosel 92. In this way, there is one in which a conventional heat radiating fan 9 can be provided to various electronic devices or electronic devices to provide a heat radiating action (see Patent Document 2).

Chinese Patent Application No. 101060676 Republic of China Notification No. I293106

  The conventional heat radiating fan as described above generally has the following problems. At present, electronic products are universally designed for research and development toward miniaturization. However, the coil 84 of the conventional heat dissipating fan 8 is installed so as to protrude from the surface of the insulation 83, so that 84 and the insulation 83 are jointly formed to have a certain axial height, so that the overall axial height can be further reduced in the radiating fan 8 having the coil 84 and the insulation 83. Therefore, since the conventional heat radiating fan 8 cannot be designed to be further reduced in size, there is a problem in that the heat radiating fan 8 cannot be attached to a downsized electronic device or electronic apparatus.

  Further, the structure of the conventional heat dissipating fan generally has the following problems. Since both the base 91 and the coil set 912 of the conventional heat radiating fan 9 are still formed so as to have a constant axial height, the heat radiating fan 9 further reduces the overall axial height. Therefore, since the conventional heat radiating fan 9 cannot be designed to be further reduced in size, the heat radiating fan 9 cannot be applied to a downsized electronic device or electronic apparatus. there were. Thus, the structure of the conventional heat dissipation fan as described above must be further improved.

  The present invention was invented in view of such problems, and the main object of the present invention is to solve the problem that it is difficult to reduce the size of a conventional heat radiating fan. It is intended to provide a miniature fan that can.

In order to achieve the above object, a miniature fan according to the present invention is as follows. That is,
It has a frame, a substrate and a fan. A mounting portion is formed on the frame, and a shaft seat is provided on the mounting portion. The substrate is coupled to the mounting portion of the frame, and the surface layer and the bottom layer are formed on the substrate so as to correspond to each other. A coil set is formed between the surface layer and the bottom layer, and the coil set is formed so as to be electrically connected to the drive circuit. The substrate is formed by overlapping a plurality of circuit layers. The coil set includes a plurality of coils electrically connected to each other, and each coil is formed on the surface of each circuit layer. The coil set (43) of each circuit layer (40a, 40b, 40c, 40d) is electrically connected to the coil set (43) of another adjacent circuit layer (40a, 40b, 40c, 40d). A circuit laying section may be formed between any two adjacent coils in one circuit layer of the substrate, and the driving circuit may be provided in the circuit laying section. The fan is provided with a central axis and a permanent magnet, the central axis is coupled to a frame seat, and the permanent magnet is provided to face the coil set.

The miniature fan according to the invention, each may be an insulating layer is provided between the several circuit layer multiple. Further, the surface layer of the substrate can be made of an insulating layer. Further, the bottom layer of the substrate can be made of an insulating layer. Further, a through hole for penetrating the surface layer and the bottom layer may be provided in the substrate, and the central axis of the fan may penetrate the through hole of the substrate and be coupled to the frame seat. Further, a through hole for penetrating the surface layer and the bottom layer may be provided in the substrate, and the central axis of the fan may penetrate the through hole of the substrate and be coupled to the frame seat.

The miniature fan according to the present invention includes a frame, a substrate, and a fan. A mounting portion is formed on the frame, and a shaft seat is provided on the mounting portion. The substrate is coupled to the mounting portion of the frame, and a surface layer is formed on a side surface facing the side contacting the substrate mounting portion (12), and a coil set is formed on one side surface of the surface layer. Is formed so as to be positioned between the surface layer and the substrate, and the coil set is formed so as to be electrically connected to the drive circuit. The substrate is formed by overlapping a plurality of circuit layers. The coil set includes a plurality of coils electrically connected to each other, and each coil is formed on the surface of each circuit layer. The coil set (43) of each circuit layer (40a, 40b, 40c, 40d) is electrically connected to the coil set (43) of another adjacent circuit layer (40a, 40b, 40c, 40d). A circuit laying section may be formed between any two adjacent coils in one circuit layer of the substrate, and the driving circuit may be provided in the circuit laying section. The fan is provided with a central shaft and a permanent magnet, the central shaft is coupled to a shaft seat of the frame, and the permanent magnet can be formed to face the coil set.

Furthermore, Miniature fan according to the invention can also be each insulating layer is provided between the several circuit layer multiple. Further, the surface layer of the substrate can be made of an insulating layer.

  According to the miniature fan of the first aspect of the present invention, since the coil set is formed between the surface layer and the bottom layer of the substrate, the coil set can be aligned inside the substrate. This has the advantage that the height can be reduced and the complexity of the structure can be simplified.

  According to the miniature fan of claim 2 of the present invention, the substrate is formed by stacking a plurality of circuit layers on each other, and the coil set includes a plurality of coils electrically connected to each other, each coil being a respective one of the coils. By forming on the surface of the circuit layer, more coils can be wound, which has the advantage that the rotational speed and torque can be increased.

  According to the miniature fan of claim 3 of the present invention, a circuit laying section is formed between any two adjacent coils of one circuit layer in the substrate, and a driving circuit is provided in the circuit laying section. Thus, there is an advantage that the height of the structure can be kept low and the complexity of the assembly can be simplified.

  According to the miniature fan of claims 4, 5, and 6 of the present invention, the surface layer and the bottom layer of the substrate are made of an insulating layer, and an insulating layer is provided between each of the plurality of circuit layers. Therefore, there is an advantage that the normal operation of the miniature fan can be ensured.

  According to the miniature fan of claims 7 and 8 of the present invention, the substrate is provided with a through-hole for penetrating the surface layer and the bottom layer, and the central axis of the fan penetrates the through-hole of the substrate and forms a shaft seat of the frame. By being combined, there is an advantage that the convenience of assembly can be enhanced.

  According to the miniature fan of claim 9 of the present invention, there is an advantage that the overall axial height can be similarly reduced and the complexity of the structure can be simplified.

It is a disassembled perspective view of the miniature fan by Example 1 of this invention. It is sectional drawing of the assembled state of the miniature fan by Example 1 of this invention. It is a disassembled perspective view of the miniature fan by Example 2 of this invention. It is a disassembled perspective view of the board | substrate of the miniature fan by Example 2 of this invention. It is a disassembled perspective view of the 1st conventional heat dissipation fan. It is sectional drawing of the state by which the 1st conventional heat radiating fan was assembled. It is a disassembled perspective view of the 2nd conventional heat radiating fan. It is sectional drawing of the assembled state of the 2nd conventional heat radiating fan.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is an exploded perspective view of a miniature fan according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view of the assembled miniature fan according to Embodiment 1 of the present invention. 1 and 2, the miniature fan according to the first embodiment of the present invention includes a frame 10, a substrate 20, and a fan 30.

  A housing space 11 is formed in the frame 10, a mounting portion 12 is provided inside the housing space 11, and a shaft seat 13 is formed in the mounting portion 12. The frame 10 is provided with an air inlet 14 and an air outlet 15, and the air inlet 14 and the air outlet 15 are all formed so as to communicate with the accommodation space 11. In addition, the frame 10 may selectively include an axial fan frame or a blower fan frame according to substantial demand. 1 and 2 is an axial fan frame.

  A surface layer 21 is formed on the substrate 20, and the surface layer 21 can be formed of an insulating layer (not shown) formed on the surface of the substrate 20. Further, another bottom layer 22 is preferably formed on the substrate 20, and the bottom layer 22 is formed so as to correspond to the surface layer 21. Further, since the bottom layer 22 can also be made of an insulating layer (not shown) formed on the surface of the substrate 20, the substrate 20 is formed to have an insulating function. The substrate 20 is coupled to the frame 10, and the bottom layer 22 of the substrate 20 is attached to the placement unit 12. In addition, since the substrate 20 is preferably made of a printed circuit board, a coil set 23 formed by a printed pattern can be provided on one side surface of the surface layer 21. The coil set 23 includes a plurality of coils 231 that are electrically connected to each other. The coil set 23 is formed so as to be positioned between the surface layer 21 and the mounting portion 12, or when the bottom layer 22 is formed on the substrate 20, the coil set 23 is preferably connected to the surface layer 21 of the substrate 20. It is formed so as to be located between the bottom layer 22.

  In addition, another drive circuit (not shown) is electrically connected to the coil set 23. The drive circuit is installed directly on the substrate 20, or the drive circuit is installed outside the housing space 11 of the frame 10, and is electrically connected from there to the coil set 23 using a circumscribed system. It can also be formed. In addition, a through hole 24 is provided in the substrate 20, the through hole 24 is formed so as to penetrate through the surface layer 21 to the bottom layer 22 in the axial direction, and each coil 231 of the coil set 23 is preferably passed through. It is formed so as to surround the periphery of the hole 24. Thereby, when the board | substrate 20 is couple | bonded with the mounting part 12 of the flame | frame 10, the shaft seat 13 of the flame | frame 10 can penetrate the through-hole 24. FIG.

  The fan 30 includes a fan wheel 31 and a permanent magnet 32. The fan wheel 31 is provided with a central shaft 311, and the central shaft 311 penetrates the through hole 24 of the substrate 20 and is then coupled to the shaft seat 13 of the frame 10. Therefore, the fan wheel 31 can be operated so as to rotate in the accommodating space 11 of the frame 10. The permanent magnet 32 is coupled to the fan wheel 31, and the permanent magnet 32 is formed to correspond to the coil set 23.

  When the miniature fan of the present invention is actually used, the coil assembly 23 is actuated by the above drive circuit, and a flux linkage action is generated between the coil assembly 23 and the permanent magnet 32, thereby rotating the fan 30 in conjunction. Can be activated. As a result, the miniature fan of the present invention can draw an air current from the air inlet 14, and further proceeds using the fan wheel 31 of the fan 30 to drive the air current to the outside through the air outlet 15 of the frame 10. Since the air can be discharged to a space, when the miniature fan is attached to various electronic devices or electronic devices, a certain heat radiation effect can be achieved.

  The miniature fan of the present invention having the structure described above mainly has the following characteristics. Using a structural design in which the coil set 23 is formed on one side surface of the surface layer 21 of the substrate 20 (preferably the surface located between the surface layer 21 and the bottom layer), the coil set 23 is aligned inside the substrate 20. Thus, it is possible to ensure that the coil set 23 does not protrude from the surface layer 21 of the substrate 20. More importantly, since there is no design of any coil structure between the fan 30 and the surface layer 21 of the substrate 20, the coil set 23 made of a printed pattern is provided under conditions matched in the substrate 20. The height of the substrate 20 in the axial direction is not excessively increased. That is, the overall axial height of the miniature fan of the present invention can be relatively reduced, and the overall structural complexity can be simplified. Therefore, when the substrate 20 is combined with the frame 10 and the fan 30 to constitute the miniature fan of the present invention, the overall axial height of the miniature fan of the present invention can be further reduced relatively. According to the miniature fan of the invention, it is possible to perform research and development and design for further reduction in weight and size.

  FIG. 3 is an exploded perspective view of a miniature fan according to Embodiment 2 of the present invention. Referring to FIG. 3, the miniature fan according to the second embodiment of the present invention includes the frame 10, the substrate 40, and the fan 30 as in the first embodiment. Since the overall structure of the frame 10 and the fan 30 is the same as that of the first embodiment described above, a description thereof will be omitted.

  FIG. 4 is an exploded perspective view of a substrate in the miniature fan according to the second embodiment of the present invention. Referring to FIGS. 3 and 4, the substrate 40 according to the second embodiment of the present invention is mainly configured by stacking a plurality of circuit layers on each other. In the embodiment shown in FIGS. 3 and 4, the substrate 40 is composed of a first circuit layer 40a, a second circuit layer 40b, a third circuit layer 40c, and a fourth circuit layer 40d. Similarly, the substrate 40 composed of a plurality of circuit layers 40a, 40b, 40c, and 40d is formed so that the surface layer 41 and the bottom layer 42 correspond to each other, and the surface layer 41 and the bottom layer 42 are preferably insulating layers on the surface of the substrate 20. An insulating layer (not shown) may be provided between the plurality of circuit layers 40a, 40b, 40c, and 40d.

  Similarly, the substrate 40 can be provided with a coil set 43 formed by a printed pattern on one side surface of the surface layer 41. The coil set 43 includes a plurality of coils 431 that are electrically connected to each other. In addition, a through hole 44 is provided in the substrate 40, the through hole 44 is formed so as to penetrate the bottom layer 42 in the axial direction via the surface layer 41, and the substrate 40 is coupled to the mounting portion 12 of the frame 10. When this is done, the shaft seat 13 of the frame 10 can penetrate the through hole 44.

  A plurality of coils formed by a printed pattern on the surface of the plurality of circuit layers 40a, 40b, 40c, 40d by designing the structure of the substrate 40 constituted by the plurality of circuit layers 40a, 40b, 40c, 40d. Since all 431 can be formed separately, the number of windings of each coil 431 can be increased. Thus, according to the miniature fan of the present invention, the overall axial height of the substrate 40 is not excessively increased and the size of the radial width of the substrate 40 does not change. Further, since more coils 431 can be wound, the rotational speed and torque can be increased, and similarly, research and development and design can be performed in the direction of further weight reduction and size reduction.

  Referring to FIG. 4 again, the drive circuit 45 can be formed directly in the circuit layer in the coil set 43. In the embodiment shown in FIG. 4, a drive circuit 45 is installed on the surface of the first circuit layer 40a, and the first circuit layer 40a forms a circuit laying section (not shown) between any two adjacent coils 431. Therefore, the drive circuit 45 is provided in a circuit laying area on the surface of the first circuit layer 40a with a sufficient space. Thereby, when the driving circuit 45 is aligned on the substrate 10, the height of the structure can be kept low, and the complexity of the assembly can be simplified.

As described above, according to the miniature fan of the present invention, the coil sets 23 and 43 of the substrates 20 and 40 are connected to one side surface (preferably the surface layers 21 and 41 and the bottom layers 22 and 42 of the surface layers 21 and 41). The design of the structure located between) can effectively reduce the axial height of the miniature fan of the present invention, and can relatively reduce the overall volume of the miniature fan, so it is lightweight Research and development and design can be performed in the direction of downsizing and miniaturization.

  The present invention may be implemented in other ways without departing from the spirit and essential characteristics thereof. Accordingly, the preferred embodiments described herein are illustrative and not limiting.

DESCRIPTION OF SYMBOLS 10 Frame 11 Storage space 12 Mounting part 13 Axle seat 14 Wind inlet 15 Wind outlet 20 Substrate 21 Surface layer 22 Bottom layer 23 Coil group 231 Coil 24 Through-hole 30 Fan 31 Fan wheel 311 Central axis 32 Permanent magnet 40 Substrate 40a, 40b, 40c 40d Circuit layer 41 Surface layer 42 Bottom layer 43 Coil set 431 Coil 44 Through-hole 45 Drive circuit 8 Heat radiation fan 81 Frame 811 Housing space 812 Base 813 Shaft tube 82 Cover plate 83 Insulation 84 Coil 85 Positioning member 86 Rotor 861 Magnet 9 Heat radiation fan 91 Base 911 Shaft hole 912 Coil set 92 Fan wheel 921 Blade 93 Single magnet 94 Shaft

Claims (9)

In a miniature fan having a frame (10), a substrate (40), and a fan (30), a mounting portion (12) is formed on the frame (10), and a shaft seat (13) is formed on the mounting portion (12). The substrate (40) is coupled to the mounting portion (12) of the frame (10), and the substrate (40) is formed so that the surface layer (41) and the bottom layer (42) correspond to each other. 41) and a bottom layer (42), a coil set (43) is formed, the coil set (43) is formed so as to be electrically connected to the drive circuit (45), and a plurality of substrates (40) are provided. The circuit layers (40a, 40b, 40c, 40d) are formed to overlap each other, and the coil set (43) includes a plurality of coils (431) electrically connected to each other, and each coil (431) is respectively Circuit layers (40a, 40b, 40c The coil set (43) of each circuit layer (40a, 40b, 40c, 40d) is formed on the surface of the other circuit layer (40a, 40b, 40c, 40d). Electrically connected, a circuit laying section is formed between any two adjacent coils (431) of one circuit layer (40a, 40b, 40c, 40d) of the substrate (40), and the drive circuit (45) is provided in the circuit laying section, the fan (30) is provided with a central axis (311) and a permanent magnet (32), and the central axis (311) is attached to the shaft seat (13) of the frame (10). A miniature fan, characterized in that the permanent magnet (32) is provided so as to face the coil set (43). Miniature fan according to claim 1, wherein each insulating layer is provided between the plurality pieces of circuit layers (40a, 40b, 40c, 40d ). Miniature fan according to claim 1 or 2, wherein a surface layer of the substrate (40) (41) is characterized Rukoto such an insulating layer. 4. The miniature fan according to claim 3, wherein the bottom layer (42 ) of the substrate (40) comprises an insulating layer. The substrate (40) is provided with a through hole (44) for penetrating the surface layer (41) and the bottom layer (42), and the central axis (311) of the fan (30) is the through hole (44) of the substrate (40). miniature fan according to claim 1 or 2 coupled to the shaft seat (13), characterized in Rukoto frame (10) by Nuki穿a. The substrate (40) is provided with a through hole (42) for penetrating the surface layer (41) and the bottom layer (42), and the central axis (311) of the fan (30) is the through hole (44) of the substrate (40). The miniature fan according to claim 3 , characterized in that it is coupled to the shaft seat (13) of the frame (10). In a miniature fan having a frame (10), a substrate (40), and a fan (30), a mounting portion (12) is formed on the frame (10), and a shaft seat (13) is formed on the mounting portion (12). The substrate (40) is coupled to the mounting portion (12) of the frame (10), and a surface layer (41) is formed on a side surface facing the side facing the mounting portion (12) of the substrate (40). The coil set (43) is formed on one side surface of the surface layer (41), and the coil set (43) is formed so as to be positioned between the surface layer (41) and the mounting portion (12). The group (43) is formed so as to be electrically connected to the drive circuit (45), and the substrate (40) is formed by superimposing a plurality of circuit layers (40a, 40b, 40c, 40d) on each other. (43) is a plurality of coils (431) electrically connected to each other. Each coil (431) is formed on the surface of each circuit layer (40a, 40b, 40c, 40d), and the coil set (43) of each circuit layer (40a, 40b, 40c, 40d) is adjacent to each other. Are electrically connected to the coil set (43) of the circuit layer (40a, 40b, 40c, 40d) of the circuit layer (40a, 40b, 40c, 40d) of the circuit layer (40a, 40b, 40c, 40d). A circuit laying section is formed between the adjacent coils (431), the drive circuit (45) is provided in the circuit laying section, and the fan (30) has a central axis (311) and a permanent magnet (32). And the central shaft (311) is coupled to the shaft seat (13) of the frame (10), and the permanent magnet (32) is formed to face the coil set (43). fan. Miniature fan according to claim 7, wherein the respective insulating layers are found provided between the plurality of circuit layers (40a, 40b, 40c, 40d ). Surface layer of the substrate (40) (41) is a miniature fan according to claim 7, wherein Rukoto such an insulating layer.

Images