TWI598510B - Heat dissipating device and swing structure thereof - Google Patents

Description

Heat sink and its swing structure

The invention relates to a heat dissipating device, in particular to an oscillating heat dissipating device and a swinging structure thereof.

The present inventors have previously proposed a heat dissipating device (Taiwan No. M529149) which is capable of achieving rapid heat dissipation by oscillating the blade, and fixing the actuating magnetic member to the corresponding blade by positioning the rivet, thereby realizing automation The equipment is produced on a large scale.

However, the above-described actuating magnetic member must be formed with a hole through which the rivet passes, thereby greatly increasing the manufacturing cost of actuating the magnetic member (at least by a factor of more than three times). Moreover, since the actuating magnetic member (such as a magnet) is a fragile material, when the actuating magnetic member is pressed by the rivet to the blade, the problem that the actuating magnetic member is broken is easily generated.

Accordingly, the inventors believe that the above-mentioned defects can be improved, and that the invention has been studied with great interest and with the use of scientific principles, and finally proposes a present invention which is rational in design and effective in improving the above-mentioned defects.

The embodiment of the invention provides a heat dissipating device and a swinging structure thereof, which can effectively improve the problems easily caused by the existing heat dissipating device.

The embodiment of the invention discloses a heat dissipating device, comprising: a carrier; a magnetic drive module mounted on the carrier, the magnetic drive module can be used to generate a magnetic field to form two magnetic regions with opposite magnetic properties, and The magnetic drive module can pass The magnetic force of the two magnetic regions is periodically reciprocally changed by the driving of a periodic power source; two swinging structures are mounted on the carrier; wherein each of the swinging structures comprises: a blade, including a mounting end and a free end; a bracket and a positioning rivet, the bracket being fixed to the blade by the positioning rivet, and the positioning rivet is located at the mounting end and the free end And a magnetically movable member that is not formed with any perforations and is fixed to the bracket; and two fixing members that respectively fix the mounting ends of the two blades to the opposite two of the carrier An outer side, and two of the actuating magnetic members are respectively located in the two magnetic regions; wherein, when the magnetic drive module generates the magnetic field, the two actuating magnetic members are respectively subjected to the two The magnetic region is driven to be displaced to cause the free end of each of the blades to oscillate.

The embodiment of the invention also discloses a swinging structure of a heat dissipating device, comprising: a blade comprising a mounting end and a free end; at least one metal bracket and a positioning rivet, wherein the metal bracket is fixed by the positioning rivet The blade, and the positioning rivet is located between the mounting end and the free end; and at least the movable magnetic member is not formed with any perforations, and at least one of the actuating magnetic members is magnetically fixed to At least one of the metal brackets; wherein an outer diameter of the contact area of the blade with the metal bracket is no more than 1/2 times an outer diameter of at least one of the actuating magnetic members.

In summary, the heat dissipating device and the swinging structure disclosed in the embodiments of the present invention can be equipped with a bracket (or a metal bracket) by positioning the rivet on the blade to avoid the problem of cracking of the actuating magnetic member and effectively Reduce the production cost of the heat sink (or swing structure).

Furthermore, the swinging structure disclosed in the embodiment of the present invention has an outer diameter of a contact area of the blade and the bracket not greater than an outer diameter of the actuating magnetic member, as compared with the prior art actuating magnetic member being directly fixed to the blade. 1/2 times, so the stress concentration that is less likely to occur during the blade swinging process, and thus the service life of the blade is effectively improved.

For a better understanding of the features and technical aspects of the present invention, reference should be made to the accompanying claims limit.

100‧‧‧heating device

1‧‧‧ Carrier

11‧‧‧Base

111‧‧‧ inside side

112‧‧‧Outside

113‧‧‧ end face

114‧‧‧Lock hole

12‧‧‧Connecting Department

2‧‧‧Magnetic drive module

21‧‧‧ core

22‧‧‧ coil

3‧‧‧ swing structure

31‧‧‧ blades

311‧‧‧Installation end

312‧‧‧Free end

32‧‧‧ brackets (eg metal brackets)

321‧‧‧ Housing Department

322‧‧‧ Positioning Department

33‧‧‧ Positioning rivets

331‧‧‧Axis

332‧‧‧ crimping department

34‧‧‧Activity magnetic parts

4‧‧‧Fixed parts

41‧‧‧ pressure plate

42‧‧‧ Rivets

D1, D2, D3‧‧‧ OD

1 is a perspective view of a heat sink of the present invention.

Figure 2 is an exploded perspective view of Figure 1.

Figure 3 is a plan view of Figure 1.

Figure 4 is a cross-sectional view taken along line IV-IV of Figure 1.

Fig. 5 is a partially enlarged schematic view showing a portion V of Fig. 4.

Figure 6 is a plan view showing another aspect of the heat sink of the present invention.

Figure 7 is a perspective exploded view of Figure 6.

Figure 8 is a cross-sectional view of Figure 6.

Fig. 9 is a partially enlarged schematic view showing the portion IX of Fig. 8.

Figure 10 is a schematic view of the operation of Figure 1.

Figure 11 is a schematic view of another operation of Figure 1.

Please refer to FIG. 1 to FIG. 11 for an embodiment of the present invention. It should be noted that the related embodiments of the present invention are only used to specifically describe the embodiments of the present invention, so that It is to be understood that the scope of the invention is not intended to limit the scope of the invention.

As shown in FIG. 1 and FIG. 2 , the heat dissipation device 100 includes a carrier 1 , a magnetic drive module 2 , two swing structures 3 , and a plurality of fixing members 4 . The magnetic drive module 2 is mounted on the carrier 1 , and the two swing structures 3 are mounted on the carrier 1 by the plurality of fixing members 4 and correspond to the position of the magnetic drive module 2 . The number of the fixing members 4 in this embodiment is exemplified by two, whereby the two swinging structures 3 are respectively fixed to the carrier 1, but the invention is not limited thereto. this.

It should be noted that the application of the swinging structure 3 is matched with the carrier 1, the magnetic drive module 2, and the fixing member 4 in this embodiment, but the application range of the swinging structure 3 is not limited thereto.

Referring to FIG. 2 to FIG. 5 , the carrier 1 is preferably configured to be manufactured by injection molding, and the carrier 1 includes two bases 11 and a circle connecting the two bases 11 . A tubular connecting portion 12, and the two bases 11 are mirror-symmetrical to the connecting portion 12. Wherein, since the configurations of the two bases 11 are substantially the same, in order to facilitate the understanding of the present embodiment, this paragraph only describes the configuration of one of the bases 11.

The base 11 includes a corresponding inner side surface 111 and an outer side surface 112, and two corresponding end surfaces 113. The top end portion of the inner side surface 111 is connected to the connecting portion 12, and the outer shapes of the two end surfaces 113 are substantially the same, and at least one of the end surfaces 113 of the two end surfaces 113 is recessed to form a locking hole 114. The piece 1 can be fixed to any position through a locking hole 114 via a screw (not shown). Furthermore, the locking hole 114 can be a blind hole or a through hole.

The magnetic drive module 2 can be used to generate a magnetic field (not shown) to form two magnetic regions opposite to each other (not shown in the drawing, corresponding to the adjacent left side of the magnetic drive module 2 in FIG. Area and adjacent right area). Furthermore, the magnetic drive module 2 can periodically change the magnetic properties of the two magnetic regions via the driving of a periodic power source (not shown). The periodic power supply may be a positive or negative half cycle of a periodic square wave, a triangular wave, a sine wave, or an alternating current. The periodic power supply of the embodiment is described by taking the positive and negative half cycles of the alternating current as an example, but is not limited. herein.

In more detail, the magnetic drive module 2 of the present embodiment includes a long core 21 (eg, a core) and a coil 22, and the core 21 is tightly coupled to the core 21 In the connecting portion 12 of the carrier 1 , the coil 22 is wound around the outer edge of the connecting portion 12 of the carrier 1 . The coil 22 is electrically connected to the periodic power source, so that when the current of the periodic power source passes through the coil 22, the coil 22 and the core 21 generate a magnetic field, and the two magnetic regions opposite to each other are time-dependent. Periodic magnetic reciprocating changes.

Since the configurations of the two swinging structures 3 are substantially the same in this embodiment, in order to facilitate understanding of the swinging structure 3, the construction of one of the swinging structures 3 will be described below.

The swinging structure 3 includes a blade 31, a bracket 32, a positioning rivet 33, and a movable magnetic member 34. The bracket 32 is fixed to the blade 31 by the above-described positioning rivet 33, and the actuating magnetic member 34 is (detachably) fixed to the bracket 32. Thereby, the swinging structure 3 can be provided with the bracket 32 by positioning the rivet 33 on the blade 31, thereby avoiding the problem of the cracking of the actuating magnetic member 34 and effectively reducing the production cost of the swinging structure 3.

Wherein, the blade 31 is a single rectangular piece and is preferably a fiberglass blade or a polyester film blade, and the blade 31 includes a mounting end portion 311 and a free end portion 312 away from the mounting end portion 311. The positioning rivet 33 is located between the mounting end portion 311 and the free end portion 312 of the blade 31 described above.

The material of the positioning rivet 33 may be plastic or metal and includes a shaft portion 331 and two crimping portions 332, and the two crimping portions 332 are integrally connected to opposite end edges of the shaft portion 331 respectively, and The outer diameter of each of the crimping portions 332 is larger than the outer diameter of the shaft portion 331. The shaft portion 331 of the positioning rivet 33 is passed through the bracket 32 and the blade 31, and the two crimping portions 332 are respectively pressed against the bracket 32 and the blade 31. In the positioning rivet 33 of the embodiment, the shaft portion 331 and each of the crimping portions 332 are hollow, but the invention is not excluded to be solid.

In the embodiment, the bracket 32 is exemplified by a metal bracket 32, and the actuating magnetic member 34 is exemplified by a circular magnet, and the above-mentioned actuating magnetic The member 34 is magnetically fixed to the bracket 32 described above. It should be noted that the actuating magnetic member 34 is of a configuration in which no perforations are formed, and therefore, any actuating magnetic member formed with perforations is not the actuating magnetic member 34 referred to in this embodiment. In addition, in the embodiment not shown, the bracket 32 may also be a non-metallic bracket (such as a plastic bracket), and the actuating magnetic member 34 is fixed to the bracket 32 by adhesion or the like.

Further, the bracket 32 includes a receiving portion 321 having a groove shape and a positioning portion 322 extending outward from a periphery of the receiving portion 321 . A portion of the positioning rivet 33 (eg, the crimping portion 332) is located in the receiving portion 321 , and the positioning rivet 33 presses the receiving portion 321 to the blade 31 , and the positioning portion 322 is located in the receiving portion 321 . It is away from the side of the blade 31 (for example, the left side of the housing portion 321 in Fig. 5).

Moreover, the positioning portion 322 is in the shape of a groove in the embodiment for limiting the position of the actuating magnetic member 34 relative to the positioning rivet 33 (eg, the actuating magnetic member 34 is confined within the edge of the positioning portion 322) The center of the actuating magnetic member 34 substantially corresponds to the center of the positioning rivet 33, but the invention is not limited thereto. For example, in the embodiment not shown, the positioning portion 322 may also be a planar structure parallel to the blade 31, and the actuating magnetic member 34 is fixed to the positioning portion 322.

It should be noted that, in this embodiment, the outer diameter D1 of the contact area of the blade 31 with the receiving portion 321 of the bracket 32 is preferably not larger than the outer diameter of the contact area of the blade 31 and the positioning rivet 33. Double the D2. Furthermore, the outer diameter D1 of the contact area of the blade 31 with the receiving portion 321 of the bracket 32 is not more than 1/2 times (preferably 1/3 times) the outer diameter D3 of the actuating magnetic member 34. .

Thereby, compared with the prior art, the actuating magnetic member is directly fixed to the blade (for example, the new patent No. M529149 in Taiwan), the blade 31 of the present embodiment has a small contact area with the bracket 32, so the blade 31 The stress concentration that is less likely to occur during the swinging process, thereby effectively increasing the service life of the blade 31.

It should be noted that the swing structure 3 shown in FIG. 1 to FIG. 5 is exemplified by a single bracket 32 and a single actuating magnetic member 34, and the bracket 32 and the actuating magnetic member 34 are both It is directed to the magnetic drive module 2, but the invention is not limited thereto. For example, the bracket 32 and the actuating magnetic member 34 may also face away from the magnetic drive module 2 (not shown).

Alternatively, as shown in FIG. 6 to FIG. 9, the number of the brackets 32 (eg, the metal brackets 32) of the swinging structure 3 and the number of the actuating magnetic members 34 are each further limited to two. Wherein, the two brackets 32 (such as the metal bracket 32) are respectively fixed on opposite sides of the blade 31 by positioning the rivets 33, and the two actuating magnetic members 34 are respectively fixed (magnetically) to the two Bracket 32 (eg, metal bracket 32). Furthermore, the shaft portion 331 of the positioning rivet 33 passes through the accommodating portion 321 and the blade 31 of the two brackets 32, and the two crimping portions 332 are respectively located in the accommodating portions 321 of the two brackets 32, and are respectively pressed against the two. The accommodating portion 321 of the bracket 32.

Further, although the swing structure 3 shown in FIGS. 6 to 9 has the same two brackets 32 and the same two actuating magnetic members 34, the present invention is not limited thereto. That is, in the embodiment not shown, the two brackets 32 described above may be of a different configuration, and the two actuating magnetic members 34 may be of a different configuration.

The two fixing members 4 respectively fix the mounting end portions 311 of the two blades 31 to opposite outer sides of the carrier 1 and respectively position the two actuating magnetic members 34 in the two magnetic regions. In more detail, each of the fixing members 4 of the present embodiment includes a pressing plate 41 and two rivets 42, and each of the fixing members 4 and their corresponding blades 31 and the base 11 will be described below. The pressing plate 41 and the bottom portion of the outer side surface 112 of the base 11 sandwich the mounting end portion 311 of the blade 31, and each rivet 42 sequentially passes through the pressing plate 41, the mounting end portion 311 of the blade 31, and the base 11, The mounting end 311 of the blade 31 described above is fixed to the base 11 of the carrier 1. In addition, the pressure plate 41 described in this embodiment may be a rigid acrylic plate or a soft rubber plate, and the invention is not limited herein.

The structure and connection relationship of the heat dissipation device 100 of the present embodiment are described above. According to this, when the magnetic drive module 2 generates the magnetic field, the two actuating magnetic members 34 are respectively displaced by the driving of the two magnetic regions to generate the free end 312 of each blade 31. swing. The swinging direction of the two blades 31 of the heat sink 100 may swing in the same direction as shown in FIG. 10 or reverse swing as shown in FIG. 11, which is not limited herein.

[Technical effect of the embodiment of the present invention]

In summary, the heat dissipating device and the swinging structure disclosed in the embodiments of the present invention can be equipped with a bracket (or a metal bracket) by positioning the rivet on the blade to avoid the problem of cracking of the actuating magnetic member and effectively Reduce the production cost of the heat sink (or swing structure).

Furthermore, compared with the prior art, the actuating magnetic member is directly fixed on the blade, the outer diameter of the contact area of the swinging structure of the embodiment through the blade and the bracket is not more than 1/ of the outer diameter of the actuating magnetic member. 2 times (or the outer diameter of the contact area of the blade and the bracket is not more than twice the outer diameter of the contact area of the blade and the positioning rivet), so the stress concentration which is less generated during the blade swinging process is effective. Improve the life of the blade.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. The equivalents and modifications made by the scope of the present invention should fall within the scope of the claims of the present invention. .

3‧‧‧ swing structure

31‧‧‧ blades

32‧‧‧ brackets (eg metal brackets)

321‧‧‧ Housing Department

322‧‧‧ Positioning Department

33‧‧‧ Positioning rivets

331‧‧‧Axis

332‧‧‧ crimping department

34‧‧‧Activity magnetic parts

D1, D2, D3‧‧‧ OD

Claims (10)

A heat dissipating device includes: a carrier; a magnetic drive module mounted on the carrier, the magnetic drive module can be used to generate a magnetic field to form two magnetic regions opposite to each other, and the magnetic drive module The magnetic properties of the two magnetic regions can be periodically reciprocally changed by driving a periodic power source; two swinging structures are mounted on the carrier; wherein each of the swinging structures comprises: a blade, The utility model comprises a mounting end and a free end; a bracket and a positioning rivet, the bracket is fixed to the blade by the positioning rivet, and the positioning riving is located at the mounting end and the free end And a magnetically movable member that is not formed with any perforations and is fixed to the bracket; and two fixing members that respectively fix the mounting ends of the two blades to the opposite two of the carrier One outer side, and two of the actuating magnetic members are respectively located in two of the magnetic regions; wherein, when the magnetic drive module generates the magnetic field, two of the actuating magnetic waves The magnetic drive two areas are displaced by the member, so that the free end of each of said generated oscillating blade. The heat dissipating device of claim 1, wherein, in each of the swinging structures, the bracket includes a receiving portion having a groove shape and a positioning portion extending outward from a periphery of the receiving portion; A portion of the positioning rivet is located within the receiving portion, and the positioning rivet presses the receiving portion to the blade. The heat dissipating device of claim 2, wherein in each of the swinging structures, the positioning portion has a groove shape for limiting a position of at least one of the actuating magnetic members relative to the positioning rivet, Having the center of the actuating magnetic member substantially correspond to Describe the center of the rivet. The heat sink according to any one of claims 1 to 3, wherein, in each of the swinging structures, an outer diameter of a contact area of the blade with the bracket is not larger than an outer diameter of the actuating magnetic member 1/2 times the diameter. The heat sink according to any one of claims 1 to 3, wherein in each of the swinging structures, the bracket is a metal bracket, and the actuating magnetic member is magnetically fixed to the bracket. A swinging structure of a heat dissipating device, comprising: a blade comprising a mounting end and a free end; at least one metal bracket and a positioning rivet, the metal bracket being fixed to the blade by the positioning rivet, and The positioning rivet is located between the mounting end portion and the free end portion; and at least the movable magnetic member is not formed with any perforations, and at least one of the actuating magnetic members is magnetically fixed to at least one of the metal brackets And an outer diameter of the contact area of the blade with the metal bracket is not more than 1/2 times an outer diameter of at least one of the actuating magnetic members. The oscillating structure of the heat dissipating device of claim 6, wherein at least one of the metal brackets comprises a receiving portion having a groove shape and a positioning portion extending outward from a periphery of the receiving portion; Partially located in the receiving portion, and the positioning rivet presses the receiving portion to the blade. The swinging structure of the heat sink according to claim 7, wherein the positioning portion has a groove shape for limiting a position of at least one of the actuating magnetic members relative to the positioning rivet, so that at least one of the The center of the moving magnet corresponds approximately to the center of the positioning rivet. The swinging structure of the heat sink according to claim 7, wherein an outer diameter of a contact area of the blade with the receiving portion is not more than twice an outer diameter of a contact area of the blade with the positioning rivet. The swinging structure of the heat sink according to any one of claims 6 to 9, wherein The number of the at least one metal bracket and the number of the at least one actuating magnetic member are each further defined as two, and the two metal brackets are respectively fixed to opposite sides of the blade by the positioning rivet, The two actuating magnetic members are magnetically fixed to the two metal brackets respectively.