TWM447428U - Extended blade structure - Google Patents

Description

Extended blade structure

The present invention relates to an extended fan blade structure, and more particularly to a method in which a tail fin is pivoted at a tail end of a blade to raise the tail wing by centrifugal force when the blade rotates, thereby increasing the amount of wind generated by the blade.

In modern society, computer-related equipment has become an indispensable product in human life, and with the diversification of information processing, computer-related equipment must continuously improve the processing speed and performance of its processing unit, such as central processing unit and interface. Cards and hard drives, in order to cope with a large number of information operations, but the improvement of computing performance, and relatively improve the internal working temperature of the devices, therefore, the fan needs to dispel the high heat generated by the fan. Furthermore, computer-related equipment is also moving toward small size, light weight, and energy saving. However, the high heat generated in the body of small and compact computer-related equipment still depends on the continuous operation of the fan to maintain its normal work. temperature.

The cooling fan on the market mainly comprises a hub disposed on the shaft of the motor and a plurality of blades disposed on the hub. The heat dissipation effect of the cooling fan blade is mainly determined by the number of blades and the two-dimensional aerodynamic effect of each blade section, and the profile of the section is generally designed based on the airfoil shape, and at the same time, The large size of the blade design and low speed operation allow the cooling fan to increase its heat dissipation. During operation, the cooling fan can be controlled to adjust the speed according to the temperature change, but the surface area of the blade is solid. Constantly, at low speeds, there may be turbulence between the large-sized blades to reduce the output wind and heat dissipation, so there is still room for improvement in design.

In view of this, in order to improve the above-mentioned shortcomings, the extended blade structure can generate an effective heat dissipation effect when operating at a low rotational speed, and can greatly increase the effective air volume when operating at a high rotational speed, and the creator has accumulated many years of experience and constant Research and development improvements, and the creation of this creation.

The main purpose of the present invention is to provide an extended fan blade structure by pivoting a tail wing that can swing up and down with respect to the blade at the end of each blade, so that the blade can be centrifugally biased by the blade when the blade rotates. Raise, allowing the upper surface of the empennage to form a continuous surface with the upper surface of the blade to increase the amount of wind generated by the blade.

For the purpose of the above, the extended fan blade structure of the present invention comprises a hub and a plurality of blades disposed on the hub, wherein each blade has a tail end pivotally provided with a tail wing that can swing up and down with respect to the blade. The empennage can be displaced upward by the centrifugal force generated when the blade rotates, such that the upper surface of the empennage forms a continuous surface with the upper surface of the blade.

In implementation, the empennage is placed in a lowered position by gravity when the blade is not rotating.

In the implementation, the one end edge of the tail fin is convexly provided with two fastening members, each of the fastening members is provided with a convex block, and the tail end of the blade is concavely provided with two buckle grooves, and the inner wall surface of each buckle groove is provided There is a fastening hole for the fasteners to be inserted into one of the fastening slots, and the projection is embedded in the fastening hole to pivotally connect the tail to the blade.

In implementation, a side of the empennage is convexly provided with a pressing portion for restraining the displacement position of the empennage when the empennage is displaced upwardly against the trailing end of the blade.

In implementation, the pressing portion is disposed between the two fastening members. In order to further understand the present creation, the following preferred embodiments, together with the drawings and figure numbers, detail the specific components of the creation and the effects achieved by the following:

Please refer to FIG. 1A and FIG. 1A , which are an embodiment of the creative extended blade structure, including a hub 1 and a plurality of blades 2 disposed on the hub 1 .

The tail end of each of the blades 2 is pivotally provided with a tail 3 that can swing up and down with respect to the blade 2. The inner edge of the tail 3 is convexly provided with two fastening members 31, and each of the fastening members 31 is provided with a protrusion 311. A pressing portion 32 is formed between the two fastening members 31. The pressing portion 32 is formed by extending the lower surface of the tail 3 toward the inner side, and the thickness of the tail portion 3 is thicker than the thickness of the rear wing 3. It is thin.

The outer edge of the tail end of the blade 2 is recessed with two fastening slots 21, and a fastening hole 211 is defined in the inner wall surface of each of the fastening slots 21, so that the fastening components 31 are respectively inserted into one of the fastening slots 21 The protrusion 311 is inserted into the fastening hole 211 to pivotally connect the tail 3 to the tail end of the blade 2. Furthermore, the blade 2 is provided with a limiting portion 22 between the two fastening grooves 21, and the limiting portion 22 is formed by extending the upper surface of the blade 2 outward, and the thickness thereof is thinner than the thickness of the blade 2.

In practice, when the hub 1 and the blade 2 are not rotated or at a lower rotational speed, the tail 3 of the tail end of each blade 2 is subjected to gravity in a lowered position (as shown in Fig. 2A-3). And when the hub 1 and the blade 2 are rotated to a certain rotational speed, each The empennage 3 can be lifted up by the centrifugal force generated by the rotation of the blade 2 (as shown in FIG. 4-5B), and reaches the maximum displacement position when the ram 3 pressing portion 32 abuts the blade 2 limiting portion 22, In order to limit the position of the rearward displacement of the empennage 3, the upper surface of each empennage 3 and its upper surface of the joined blade 2 are successively formed into a continuous surface to increase the effective area of the upper surface of the blade 2 to generate a larger air volume.

Therefore, this creation has the following advantages:

1. This creation system can be directly applied to the current cooling fan structure, which can reduce the total area of the upper surface of the blade at a lower fan speed to avoid the occurrence of turbulence, and increase the blade at a higher fan speed. The total area of the upper surface enables the cooling fan to produce an effective heat dissipation effect at low speed or high speed to enhance its practicality.

2. The structure of the creation is simple and easy to assemble, which can greatly increase the practicality and the added value of the cooling fan.

In summary, according to the above disclosure, the creation can achieve the intended purpose of creation, providing a kind of heat dissipation air volume at low speed, and greatly increasing the generated air volume and wind pressure at high speed. In order to enhance the efficiency of the cooling fan, the extended fan blade structure is of great value in the industry, and a new patent application is proposed according to law.

1‧‧·wheels

2‧‧‧ leaves

21‧‧‧ buckle groove

211‧‧‧holding holes

22‧‧‧Limited

3‧‧‧Tail

31‧‧‧Fittings

311‧‧‧Bumps

32‧‧‧Fist

Fig. 1 is an exploded perspective view showing an embodiment of the extended blade structure of the present invention.

Fig. 1A is a partially exploded perspective view of the embodiment of Fig. 1.

Fig. 2A is a front view showing the appearance of the embodiment of Fig. 1 when the tail fin is not raised.

Fig. 2B is a schematic view showing the appearance of the back side of the embodiment of Fig. 1 when the tail fin is not raised.

Fig. 3 is a front view showing the appearance of the embodiment of Fig. 1 when it is mounted on a heat dissipation fan frame and the tail fin is not raised.

Figure 4 is a front elevational view of the embodiment of Figure 1 when mounted on a cooling fan frame with the tail wing raised.

Fig. 5A is a front view showing the appearance of the embodiment of Fig. 1 when the tail is raised.

Fig. 5B is a schematic view showing the appearance of the back side of the embodiment of Fig. 1 when the tail fin is raised.

1‧‧·wheels

2‧‧‧ leaves

21‧‧‧ buckle groove

211‧‧‧holding holes

22‧‧‧Limited

3‧‧‧Tail

31‧‧‧Fittings

311‧‧‧Bumps

32‧‧‧Fist

Claims (5)

An extended fan blade structure includes a hub and a plurality of blades disposed on the hub, wherein each blade has a tail end pivotally provided with a tail wing that can swing up and down with respect to the blade, and the tail wing can be rotated by the blade The centrifugal force generated at the time is displaced upward, so that the upper surface of the empennage forms a continuous surface with the upper surface of the blade. The extended blade structure of claim 1, wherein the tail is placed in a lowered position by gravity when the blade is not rotated. The extended fan blade structure according to claim 1, wherein one side of the empennage is convexly provided with two fastening members, and each of the fastening members is provided with a convex piece, and the tail end of the blade is concave. Two fastening grooves are provided, and a fastening hole is formed on the inner wall surface of each of the fastening grooves, wherein the fastening members are respectively inserted into one of the fastening grooves, and the protruding block is embedded in the fastening hole to pivotally connect the tail to the blade. The extended fan blade structure of claim 3, wherein a side edge of the empennage is convexly provided with a pressing portion for restraining the empennage when the empennage is displaced upwardly against the tail end of the blade. The position of the displacement. The extended fan blade structure of claim 4, wherein the pressing portion is disposed between the two fastening members.