CN111577623B

CN111577623B - Luminous fan

Info

Publication number: CN111577623B
Application number: CN201910117388.6A
Authority: CN
Inventors: 黄韦强; 詹伟平
Original assignee: Primax Electronics Ltd
Current assignee: Primax Electronics Ltd
Priority date: 2019-02-15
Filing date: 2019-02-15
Publication date: 2022-02-01
Anticipated expiration: 2039-02-15
Also published as: CN111577623A

Abstract

The present invention provides a light-emitting fan, including: support structure, main circuit board, leaded light fan wheel and light emitting module. The light guide fan wheel is pivoted on the bracket of the supporting structure. The light-emitting module is arranged in the hub of the light guide fan wheel, and the light-emitting unit of the light-emitting module emits light to the adjacent lens element and transmits the light to the light guide fan wheel through the refraction of the secondary lens of the lens element so as to enable the light guide fan wheel to emit light.

Description

Luminous fan

Technical Field

The present invention relates to a fan, and more particularly, to a fan with a light emitting function.

Background

In the present day, desktop computers have become essential household appliances for small and medium-sized families, and generally, a heat dissipation fan is disposed in a computer host for discharging hot air in the host shell to prevent a processor, a motherboard or a hard disk from being damaged due to overheating.

In order to meet the needs or preferences of different users, computer hosts with transparent shells are currently sold in the market, so that the users can directly observe the internal structure or condition of the computer hosts. On the other hand, the computer host can also be provided with a heat radiation fan with a light-emitting function, so that when the computer host is started, the heat radiation fan with the light-emitting function can emit light and perform heat radiation simultaneously, and the computer host can keep stable operation and has fashionable appearance. In order to reduce the overall size of the light-emitting fan, the light-emitting fan can better meet the trend of thinning and miniaturization of the computer host or the electronic device, and the solid-state light source with small size and high light-emitting efficiency, such as: light emitting diodes have also been widely used in light emitting modules of various types of light emitting fans.

However, since the light emitted by the solid-state light source is mostly linear, the diffusion angle is small, when the volume of the light-emitting fan is reduced, the path for transmitting the light is easily shortened, and the range of light projection is too concentrated, so that not only the overall luminous intensity of the light-emitting fan is reduced, but also noise (hot spot) with uneven brightness is formed at the projection position by the too concentrated light, and the light-emitting fan cannot generate an even brightness effect.

In view of this, the technical problem to be solved by the present invention is how to improve the utilization rate of the light source of the light-emitting fan, so as to improve the overall light-emitting intensity of the light-emitting fan and avoid the generation of light source noise.

Disclosure of Invention

The present invention is directed to a light-emitting fan with improved light utilization efficiency, so as to improve the overall light-emitting intensity of the light-emitting fan, and to avoid the generation of light source noise, so that the light-emitting fan has a uniform brightness effect.

To achieve the above object, the present invention provides a light-emitting fan, including:

a support structure having a bracket;

the main circuit board is arranged on the bracket;

the light guide fan wheel, pin joint in the bracket and can rotate for the bracket, include:

a hub; and

the fan blades are annularly arranged on the side part of the hub;

the light emitting module is arranged in the wheel hub and comprises:

a lens element having at least one secondary lens; and

a light emitting element having at least one light emitting unit;

the light-emitting unit is used for emitting light to the lens element, and the light is transmitted to the light guide fan wheel through the refraction of the secondary lens so as to enable the light guide fan wheel to emit light.

In the above preferred embodiment, the hub has an inner annular wall therein, and the inner annular wall is annularly disposed at the top of the hub to divide the interior of the hub into a first receiving space and a second receiving space.

In the above preferred embodiment, the light emitting module is located in the second accommodating space.

In the above preferred embodiment, the first accommodating space is used for disposing the rotor set and the opposite stator set.

In the above preferred embodiment, the stator set is disposed above the bracket, and the rotor set is fixed on the surface of the inner ring wall.

In the above preferred embodiment, the lens element includes a light guide portion and a support portion connected to the light guide portion.

In the above preferred embodiment, the light guide portion has an outer ring wall and an inner ring wall opposite to each other, and the secondary lens is disposed on the outer ring wall.

In the above preferred embodiment, the supporting portion extends to form a limiting flange at one side of the inner ring wall, and an annular accommodating groove is formed between the inner ring wall and the limiting flange.

In the above preferred embodiment, the light emitting element has a ring-shaped circuit board, and the light emitting unit is disposed on a surface of the ring-shaped circuit board.

In the above preferred embodiment, the annular circuit board is disposed in the annular accommodating groove, and the light emitting unit faces the inner wall surface.

In the above preferred embodiment, the outer edge of the bracket has a groove for accommodating the supporting portion, and the limiting flange abuts against the outer edges of the bracket and the main circuit board.

In the above preferred embodiment, the bracket has a coupling portion for pivotally connecting the light guiding impeller.

In the above preferred embodiments, the lens element is an annular lens structure.

Drawings

FIG. 1A is a perspective view of a light-emitting fan according to the present invention;

FIG. 1B is an exploded perspective view of a light-emitting fan according to the present invention;

FIG. 1C is an exploded perspective view of a lighting module of the present invention;

FIG. 2 is a top perspective view of the light emitting fan of the present invention;

FIG. 3 is a cross-sectional view of a light-emitting fan according to the present invention; and

fig. 4 is an enlarged view of the area a in fig. 3.

Wherein the reference numerals are as follows:

region A

L ray

S1 first accommodating space

S2 second accommodating space

S3 circular containing groove

1 luminous fan

10 light guide fan wheel

11 wheel hub

111 inner ring wall body

12 blade of fan

20 rotor set

30 stator group

40 light emitting module

41 light emitting element

412 annular circuit board

413 light emitting unit

42 lens element

421 light guide part

4211 outer ring wall surface

42111 Secondary lens

4212 inner ring wall surface

422 support part

4221 Limit flange

50 supporting structure

51 bracket

511 coupling part

512 groove

52 rib

60 main circuit board

Detailed Description

The advantages and features of the present invention and methods of accomplishing the same will be understood more readily by reference to the following detailed description of exemplary embodiments and accompanying drawings. This invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

First, referring to fig. 1A and 1B, fig. 1A is a schematic perspective view of a light-emitting fan according to the present invention; fig. 1B is an exploded perspective view of the light-emitting fan of the present invention. The light-emitting fan 1 includes: light guide fan wheel 10, rotor set 20, stator set 30, light emitting module 40, support structure 50 and main circuit board 60.

The light guide fan wheel 10 includes: a hub 11 and a plurality of blades 12. Wherein, the fan blades 12 are annularly arranged on the side part of the hub 11; the hub 11 has an inner annular wall 111 therein, and the inner annular wall 111 is disposed at the top of the hub 11 to divide the interior of the hub 11 into a first receiving space S1 and a second receiving space S2 surrounding the first receiving space S1. The first receiving space S1 has a rotating shaft (not shown) connected to the top of the hub 11. In the present embodiment, the light guide fan wheel 10 is made of a light-transmitting/light-guiding material, such as: polycarbonate (PC) or acryl, and in some embodiments, a diffusion powder or a fluorescent powder may be mixed in the manufacturing process of the light guide fan wheel 10 to improve the overall light guide or light emitting effect of the light guide fan wheel 10.

The light emitting module 40 includes a light emitting element 41 and a lens element 42, and in the embodiment, the lens element 42 is an annular lens structure. The support structure 50 includes a bracket 51 and a plurality of ribs 52, wherein one end of each rib 52 is connected to the bracket 51, and the other end is connected to a fan frame (not shown). The main circuit board 60 is disposed on the bracket 51. The rotor assembly 20 and the stator assembly 30 are both located in the first accommodating space S1, wherein the stator assembly 30 is disposed on the bracket 51 and located above the main circuit board 60, and the rotor assembly 20 is fixed on the surface of the inner annular wall 111 and opposite to the rotor assembly 20. The outer edge of the bracket 51 is provided with a groove 512, and the groove 512 is used for accommodating and fixing the light emitting module 40. The bracket 51 has a coupling portion 511 at the center thereof, and the coupling portion 511 is used for pivotally connecting a rotating shaft (not shown) at the top of the hub 11, so that the light guide fan wheel 10 can rotate relative to the bracket 51. In the present embodiment, the main circuit board 60 is used for controlling and providing power to the light emitting module 40 and the stator assembly 30, on one hand, the main circuit board can control the light emitting module 40 to emit light to the hub 11 or the fan blade 12; on the other hand, the power of the stator set 30 can be controlled to control the rotation speed of the light guide fan wheel 10.

Referring to fig. 1C, fig. 1C is an exploded perspective view of a light emitting module according to the present invention. The light emitting device 41 includes a ring-shaped circuit board 412 and a light emitting unit 413, and the light emitting unit 413 is disposed on a surface of the ring-shaped circuit board 412. The lens element 42 has a light guide portion 421 and a support portion 422 connected to the light guide portion 421. The light guide portion 421 has an outer ring wall 4211 and an inner ring wall 4212 opposite to each other, and the outer ring wall 4211 is provided with one or more secondary lenses 42111 connected to each other. The support portion 422 has a position-limiting flange 4221 extending from one side of the inner ring wall 4212, and an annular receiving groove S3 is formed between the inner ring wall 4212 and the position-limiting flange 4221. In the present embodiment, the ring-shaped circuit board 412 is disposed in the ring-shaped receiving groove S3 by means of bonding or engaging, and the light emitting unit 413 faces the inner ring wall 4212. In addition, the light emitting unit 413 may be: a Light Emitting Diode (LED) unit, an Organic Light Emitting Diode (OLED), a Quantum dot Light Emitting Diode (QLED) unit, or an Electro Luminescence (EL) unit.

Referring to fig. 2 and 3, fig. 2 is a top perspective view of the light-emitting fan of the present invention; FIG. 3 is a cross-sectional view of a light-emitting fan according to the present invention. The rotor assembly 20 and the stator assembly 30 are both disposed in the first accommodating space S1. The coupling portion 511 is located in the first receiving space S1 and pivotally connected to the hub 11 of the light guide fan 10. The light emitting module 40 is located in the second accommodating space S2 and disposed on the groove 512 at the outer edge of the bracket 51.

Next, referring to fig. 4, fig. 4 is an enlarged view of a region a in fig. 3. In fig. 4, the groove 512 on the outer edge of the holder 51 is used for accommodating the supporting portion 422 of the lens element 42, and the position-limiting flange 4221 extending from the supporting portion 422 abuts against the outer edges of the holder 51 and the main circuit board 60, thereby fixing the lens element 42. The light emitting unit 413 emits a light L toward the inner ring wall 4212, and the light L is transmitted to the secondary lens 42111 through the inner ring wall 421, and then is refracted by the secondary lens 42111 and projected to the hub 11 or the fan blade 12. Here, by refraction of the secondary lens 42111 after light collection in the vertical axis direction, the light emitting intensity of the light emitting unit 413 can be increased, and the light L can be diffused in the horizontal axis direction by refraction, so that the generation of light source noise can be effectively reduced, and the overall brightness of the light guide fan wheel 10 can be more uniform. Although the present invention only proposes the embodiment of fixing the light emitting module 40 on the bracket 51, in practical applications, the light emitting module 40 may be disposed at any position of the second accommodating space S2, for example, the lens element 40 may be disposed on the surface of the inner annular wall 111 and flush with the position of the fan blade 12, so that the secondary lens 42111 is aligned with the fan blade 12, and the fan blade 12 can completely receive the light L generated by the light emitting module 40, thereby reducing the loss of light due to refraction or reflection.

Compared with the prior art, the light-emitting fan provided by the invention has the advantages that the linear light emitted by the light-emitting unit 413 can be refracted by the secondary lens 42111 structure of the lens element 42 to improve the luminous intensity, and on the other hand, the linear light emitted by the light-emitting unit 413 can be uniformly diffused, so that the light-emitting fan can effectively reduce the generation of light source noise while reducing the overall size and volume, and the brightness effect of the light-emitting fan is more uniform; therefore, the present invention is a creation with great industrial value.

The invention may be modified in various ways by anyone skilled in the art without however departing from the scope of the appended claims.

Claims

1. A light-emitting fan, comprising:

a support structure having a bracket;

a main circuit board arranged on the bracket;

a light guiding fan wheel pivoted to the bracket and capable of rotating relative to the bracket, comprising:

a hub; and

a plurality of fan blades annularly arranged on the side part of the hub;

a light emitting module disposed in the hub, comprising:

the lens element is of an annular lens structure and is provided with at least one secondary lens, a light guide part and a supporting part connected with the light guide part, the light guide part is provided with an outer ring wall surface and an inner ring wall surface which are opposite, the at least one secondary lens is arranged on the outer ring wall surface, one side of the supporting part on the inner ring wall surface extends to form a limiting flange, and an annular accommodating groove is arranged between the inner ring wall surface and the limiting flange; and

and the light-emitting element is provided with at least one light-emitting unit and a ring-shaped circuit board, the at least one light-emitting unit is arranged on one surface of the ring-shaped circuit board, the ring-shaped circuit board is arranged in the ring-shaped accommodating groove, the at least one light-emitting unit faces the inner ring wall surface, the at least one light-emitting unit is used for emitting a light ray to the lens element, and the light ray is transmitted to the light-guiding fan wheel through the refraction of the at least one secondary lens so as to enable the light-guiding fan wheel to emit light.

2. The luminescent fan as claimed in claim 1, wherein the hub has an inner annular wall therein, the inner annular wall is disposed at the top of the hub to divide the interior of the hub into a first receiving space and a second receiving space.

3. The light-emitting fan of claim 2, wherein the light-emitting module is located in the second accommodating space.

4. The light-emitting fan of claim 2, wherein the first receiving space is configured to accommodate a rotor set and an opposite stator set.

5. The light-emitting fan of claim 4, wherein the stator assembly is disposed above the bracket, and the rotor assembly is fixed to a surface of the inner annular wall.

6. The light-emitting fan of claim 1, wherein the bracket has a groove at an outer edge thereof for receiving the supporting portion, and the limiting flange abuts against the outer edges of the bracket and the main circuit board.

7. The light-emitting fan of claim 1, wherein the bracket has a coupling portion for pivotally connecting the light-guiding impeller.