HEAT DISSIPATING DEVICE

Abstract

A heat dissipating device includes a carrier, a magnetic driving module installed on the carrier, two fixing rivets, and two swing structures. Each of the swing structures includes a blade, a positioning rivet, and a magnetic actuation fixed on the blade by using the positioning rivet. The two blades are respectively fixed on two opposite outer sides of the carrier by using the two fixing rivets, and the two blades are parallel to each other. When the magnetic driving module generates a magnetic field, the two magnetic actuations are moved by the magnetic field to swing the two blades.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The instant invention relates to a heat dissipating device; in particular, to a heat dissipating device using swing blades.

2. Description of Related Art

The present inventor has previously provided a heat dissipating device (i.e., Taiwan Patent Publication No. 1519758) which can rapidly dissipate heat by swing blades thereof. Improving on the heat dissipating device for automated and large-scale production is one of the inventor's major concerns.

SUMMARY OF THE INVENTION

The instant disclosure provides a heat dissipating device, which can be mass produced with automated equipment.

The instant disclosure provides a heat dissipating device including a carrier, a magnetic driving module installed to the carrier, two swing structures fastened to the carrier, and two fixing rivets. The magnetic driving module is configured to generate a magnetic field, and the magnetic field defines two magnetic areas respectively having two opposite magnetisms. The magnetic driving module is configured to cyclically change the magnetisms of the two magnetic areas by receiving a periodic power. Each of the two swing structures includes a blade, a positioning rivet, and a magnetic actuation. The blade has a mounting portion and a free end portion. The magnetic actuation is fixed on a portion of the blade by using the positioning rivet, and the portion of the blade is arranged between the mounting portion and the free end portion. The two fixing rivets respectively fix the mounting portions of the two blades to two opposite outer sides of the carrier. The two blades are parallel to each other, and the two magnetic actuations are respectively arranged in the two magnetic areas. When the magnetic driving module generates the magnetic field, the two magnetic actuations are moved by the two magnetic areas to swing the free end portions of the two blades.

In summary, the heat dissipating device of the instant disclosure adapts the positioning rivets to fix the magnetic actuations onto the blades and adapts the fixing rivets to fix the blades onto the carrier, so that the structure of the heat dissipating device can be easily mass produced with automated equipment.

In order to further appreciate the characteristics and technical contents of the instant invention, references are hereunder made to the detailed descriptions and appended drawings in connection with the instant invention. However, the appended drawings are merely shown for exemplary purposes, and should not be construed as restricting the scope of the instant invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing an embodiment of a heat dissipating device according to the instant disclosure;

FIG. 2 is a perspective view of FIG. 1 from another perspective;

FIG. 3 is an exploded perspective view of FIG. 1;

FIG. 4 is a front view of FIG. 1;

FIG. 5 is a cross-sectional view along a cross-sectional line V-V of FIG. 1;

FIG. 6 is a cross-sectional view along a cross-sectional line VI-VI of FIG. 1;

FIG. 7 is a cross-sectional view showing the cross-section V II of FIG. 6;

FIG. 8 is a front view showing the embodiment of the heat dissipating device in a first operation mode;

FIG. 9 is a front view showing the embodiment of the heat dissipating device in a second operation mode; and

FIGS. 10-14 are schematic views each showing a swing structure of the heat dissipating device according to other embodiments of the instant disclosure.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

References are hereunder made to the detailed descriptions and appended drawings in connection with the instant invention. However, the appended drawings are merely provided for exemplary purposes, and should not be construed as restricting the scope of the instant invention.

Reference is first made to FIGS. 1 to 9, which show an embodiment of the instant disclosure. As shown in FIGS. 1 and 2, the instant embodiment discloses a heat dissipating device 100 that includes a carrier 1, a magnetic driving module 2, two swing structures 3, and a plurality of fixing rivets 4. The magnetic driving module 2 is installed to the carrier 1. The two swing structures 3 are fastened to the carrier 1 by using the fixing rivets 4 and correspond in position to the magnetic driving module 2. The number of the fixing rivets 4 in the instant embodiment is four, but is not limited thereto. For example, the number of the fixing rivets 4 may be two for respectively fixing the two swing structures 3 onto the carrier 1.

As shown in FIGS. 3 through 7, the carrier 1 is suitable to be formed by insert molding. The carrier 1 includes two bases 11 and a tube-like connecting portion 12 (as shown in FIG. 5) connecting the two bases 11. The two bases 11 in the instant embodiment are in a mirror symmetrical arrangement with respect to the connecting portion 12. As the two bases 11 in the instant embodiment are of the same structure, the following description discloses the structure of just one of the two bases 11 for the sake of brevity. The base 11 includes an inner surface 111, an outer surface 112 opposing to the inner surface 111, and two opposite end surfaces 113. The inner surface 111 is connected to the connecting portion 12. The base 11 has a positioning trough 114 formed on the outer surface 112. The two end surfaces 113 are of the same shape. At least one fixing hole 115 is recessed in at least one of the two end surfaces 113, such that the carrier 1 can be fixed onto an external object (not shown) by extending a screw (not shown) through the fixing hole 115 and into the external object. Moreover, the fixing hole 115 can be a blind hole or a thru-hole.

In other words, two opposite ends of the connecting portion 12 are respectively connected to the inner surfaces 111 of the two bases 11. The positioning troughs 114 of the two bases 11 are respectively formed on the two outer surfaces 112 of the carrier 1. Specifically, in each of the two bases 11, the positioning trough 114 includes a bottom flange 1141 formed on a bottom edge of the outer surface 112, and two side flanges 1142 respectively formed on two opposite side edges of the outer surface 112. The bottom flange 1141 and the two side flanges 1142 of each of the two bases 11 are in a U-shape.

However, the structure of the positioning trough 114 is not limited to the above description. For example, as shown in FIG. 10, in each of the two bases 11, the positioning trough 114 includes a bottom flange 1141 formed on a bottom edge of the outer surface 112, and a side flange 1142 formed on a side edge of the outer surface 112. The bottom flange 1141 and the side flange 1142 of each of the two bases 11 are in an L-shape.

The magnetic driving module 2 is configured to generate a magnetic field (not shown). The magnetic field defines two magnetic areas (i.e., a left area and a right area of the magnetic driving module 2 as shown in FIG. 4) respectively having two opposite magnetisms. The magnetic driving module 2 is configured to cyclically change the magnetisms of the two magnetic areas by receiving a periodic power (not shown). The periodic power can be periodic square waves, periodic triangle waves, periodic sine waves, or the positive and negative half-cycle period of alternating currents. The periodic power exemplified in the instant embodiment is the positive and negative half-cycle period of alternating currents.

Specifically, the magnetic driving module 2 in the instant embodiment includes an elongated core 21 (i.e., iron core) and a coil 22. The core 21 couples into the connecting portion 12 of the carrier 1 in a tight-fitting connection, and the coil 22 is wound around an outer side of the connecting portion 12 of the carrier 1. The coil 22 is electrically connected to the periodic power. When the periodic power emits a current to travel in the coil 22, the coil 22 and the core 21 generate the magnetic field, and the magnetisms of the two magnetic areas are cyclically changed with time.

As the two swing structures 3 in the instant embodiment are of the same structure, the following description discloses just one of the two swing structures 3 for the sake of brevity. The swing structure 3 includes an elongated blade 31, a positioning rivet 32, and a magnetic actuation 33 fixed on the blade 31 by using the positioning rivet 32. The blade 31 has a rectangular shape and may be a glass-fiber blade or a polyester blade. The blade 31 includes a mounting portion 311 and a free end portion 312 respectively arranged on two opposite portions thereof. The magnetic actuation 33 is fixed on a portion of the blade 31 arranged between the mounting portion 311 and the free end portion 312. Specifically, the magnetic actuation 33 in the instant embodiment has two magnets 331 respectively disposed on two opposite surfaces of the blade 31, but the magnetic actuation 33 in another embodiment (not shown) of the instant disclosure can be a single magnet 331. The positioning rivet 32 is made of plastic or metal and includes a shaft portion 321 and two abutting portions 322. The two abutting portions 322 are respectively and integrally connected to two opposite ends of the shaft portion 321. An outside diameter of each of the abutting portions 322 is larger than that of the shaft portions 321. The shaft portion 321 is inserted into the blade 31 and the two magnets 331, and the two abutting portions 322 are respectively abutted against outer surfaces of the two magnets 331. Moreover, the shaft portion 321 and the two abutting portions 322 of the positioning rivet 32 in the instant embodiment each has a hollow structure, but the shaft portion 321 and the two abutting portions 322 of the positioning rivet 32 in the other embodiment (not shown) each can be of a solid structure.

The mounting portions 311 of the two blades 31 are respectively positioned in the two positioning troughs 114, and a bottom edge of each of the two blades 31 is abutted against the bottom flange 1141 of the corresponding positioning trough 114. Accordingly, the blade 31 does not protrude from a bottom surface of the corresponding base 11, so as to simplify the assembling process of the heat dissipating device 100. Moreover, the fixing rivets 4 are used to respectively fasten the mounting portions 311 of the two blades 31 onto two outer surfaces 112 of the carrier 1, such that the two blades 31 are in a parallel arrangement and the two magnetic actuations 33 are respectively arranged in the two magnetic areas.

Specifically, each of the fixing rivets 4 is made of plastic or metal and includes a shaft portion 41 and two abutting portions 42. In each of the fixing rivets 4, the two abutting portions 42 are respectively and integrally connected to two opposite ends of the shaft portion 41. An outside diameter of each of the abutting portions 42 is larger than that of the shaft portions 41. In the instant embodiment, the shaft portion 41 and the two abutting portions 42 of each of the fixing rivets 4 each has a hollow structure, but the shaft portion 41 and the two abutting portions 42 of each of the fixing rivets 4 in another embodiment (not shown) of the instant disclosure each can be of a solid structure.

Moreover, the shaft portions 41 of the two fixing rivets 4 are respectively inserted into the mounting portions 311 of the two blades 31 and are respectively inserted into the two bases 11, and the two abutting portions 42 of each of the fixing rivets 4 are respectively abutted against the mounting portion 311 of the corresponding blade 31 and the inner surface 111 of the corresponding base 11. One of the two abutting portions 42 of each of the two fixing rivets 4 abutted against the mounting portion 311 of the corresponding blade 21 is arranged in the positioning trough 114 of the corresponding base 11. Accordingly, each of the abutting portions 42 does not protrude from the positioning trough 114 of the corresponding base 11, so as to simplify the assembling process of the heat dissipating device 100.

When the magnetic driving module 2 generates the magnetic field, the two magnetic actuations 33 are moved by the two magnetic areas to swing the free end portions 312 of the two blades 31. The two blades 31 of the heat dissipating device 100 can swing in the same direction (as shown in FIG. 8) or in an opposite direction (as shown in FIG. 9).

In addition, the swing structure 3 of the instant disclosure can be changed according to practical needs and is not limited to that shown in the figures. For example, in each of the two swing structures 3 as shown in FIGS. 10 through 13, the magnetic actuation 33 includes at least one magnet 331 and at least one buffering pad 332 abutted against the blade 31. The at least one magnet 331 and the at least one buffering pad 332 are fixed on the blade 31 by the positioning rivet 32.

Specifically, as shown in FIG. 10, the magnetic actuation 33 includes a magnet 331 and a buffering pad 332 sandwiched between the magnet 331 and the blade 31. The magnet 331 and the buffering pad 332 are fastened to the blade 31 by the positioning rivet 32.

As shown in FIG. 11, the magnetic actuation 33 includes two magnets 331 and two buffering pads 332 respectively disposed on two opposite surfaces of the blade 31. The two magnets 331 are respectively disposed on the two buffering pads 332, and the magnets 331 and the buffering pads 332 are fastened to the blade 31 by the positioning rivet 32.

As shown in FIG. 12, the magnetic actuation 33 includes a magnet 331 and a buffering pad 332 both respectively disposed on two opposite surfaces of the blade 31. The magnet 331 and the buffering pad 332 are fastened to the blade 31 by the positioning rivet 32.

As shown in FIG. 13, the magnetic actuation 33 includes two magnets 331 respectively disposed on two opposite surfaces of the blade 31 and two buffering pads 332 respectively disposed on the magnets 331. The magnets 331 and the buffering pads 332 are fastened to the blade 31 by the positioning rivet 32.

[The Effect of the Instant Disclosure]

In summary, the heat dissipating device of the instant disclosure adapts the positioning rivets to fix the magnetic actuations onto the blades and adapts the fixing rivets to fix the blades onto the carrier, so that the structure of the heat dissipating device can be easily mass produced with automated equipment.

Moreover, the mounting portions of the two blades are respectively positioned in the two positioning troughs, and one of the abutting portions of each of the fixing rivets abutted against the mounting portion of the corresponding blade is arranged in the positioning trough of the corresponding base, so that the blades do not protrude from the bottom surface of the bases and each of the abutting portions does not protrude from the positioning trough of the corresponding base. Thus, the assembling process of the heat dissipating device is also made easier.

The descriptions illustrated supra set forth simply the preferred embodiments of the instant invention; however, the characteristics of the instant invention are by no means restricted thereto. All changes, alterations, or modifications conveniently considered by those skilled in the art are deemed to be encompassed within the scope of the instant invention delineated by the following claims.

Claims

1. A heat dissipating device, comprising: a carrier;a magnetic driving module installed to the carrier, wherein the magnetic driving module is configured to generate a magnetic field, the magnetic field defining two magnetic areas respectively having two opposite magnetisms, and the magnetic driving module being configured to cyclically change the magnetisms of the two magnetic areas by receiving a periodic power;two swing structures fastened to the carrier, each of the two swing structures comprising: a blade having a mounting portion and a free end portion;a positioning rivet; anda magnetic actuation fixed on a portion of the blade by using the positioning rivet, wherein the portion of the blade is arranged between the mounting portion and the free end portion; andtwo fixing rivets respectively fixing the mounting portions of the two blades to two opposite outer sides of the carrier, wherein the two blades are parallel to each other, and the two magnetic actuations are respectively arranged in the two magnetic areas, and wherein when the magnetic driving module generates the magnetic field, the two magnetic actuations are moved by the two magnetic areas to swing the free end portions of the two blades.

2. The heat dissipating device as claimed in claim 1, wherein the carrier has two positioning troughs, and the mounting portions of the two blades are respectively positioned in the two positioning troughs.

3. The heat dissipating device as claimed in claim 2, wherein the carrier includes two bases and a connecting portion connecting the two bases, the two bases being in a mirror symmetrical arrangement with respect to the connecting portion, and wherein each of the two bases has an inner surface and an outer surface, two opposite ends of the connecting portion are respectively connected to the inner surfaces of the two bases, and the two positioning troughs are respectively formed on the outer surfaces of the two bases.

4. The heat dissipating device as claimed in claim 3, wherein each of the two fixing rivets includes a shaft portion and two abutting portions respectively and integrally connected to two opposite ends of the shaft portion, and an outside diameter of each of the abutting portions is larger than that of each of the shaft portions, and wherein the shaft portions of the two fixing rivets are respectively inserted into the mounting portions of the two blades and are respectively inserted into the two bases, and the two abutting portions of each of the fixing rivets are respectively abutted against the mounting portion of the corresponding blade and the inner surface of the corresponding base.

5. The heat dissipating device as claimed in claim 4, wherein one of the two abutting portions of each of the two fixing rivets abutted against the mounting portion of the corresponding blade is arranged in the positioning trough of the corresponding base.

6. The heat dissipating device as claimed in claim 1, wherein in each of the two swing structures, the magnetic actuation includes at least one magnet and at least one buffering pad abutted against the blade, and the at least one magnet and the at least one buffering pad are fixed on the blade by the positioning rivet.

7. The heat dissipating device as claimed in claim 3, wherein each of the two bases has two opposite end surfaces, and at least one fixing hole is recessed in at least one of the two end surfaces of each of the two bases.

8. The heat dissipating device as claimed in claim 3, wherein the magnetic driving module includes a core and a coil, the core coupling into the connecting portion of the carrier in a tight-fitting manner, and the coil wounding on an outside of the connecting portion of the carrier.

9. The heat dissipating device as claimed in claim 3, wherein in each of the two bases, the positioning trough includes a bottom flange formed on a bottom edge of the outer surface and at least one side flange formed on at least one side edge of the outer surface.

10. The heat dissipating device as claimed in claim 3, wherein in each of the two bases, the positioning trough includes a bottom flange formed on a bottom edge of the outer surface and two side flanges respectively formed on two opposite side edges of the outer surface.