This application claims the priority benefit of Taiwan application serial no. 102113305, filed on Apr. 15, 2013. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.
1. Field of the Application
The invention relates to a fan system, and more particularly, to a fan system with a fan protecting module.
2. Description of Related Art
In today's information explosion era, electronic products are widely used in people's daily life. Along with continuous development of electronic technology, various electronic products have continuously been emerged. In terms of development and application of personal computers, desktop personal computers (desktop PC) are firstly developed. Nevertheless, the desktop personal computers have larger volumes and a disadvantage in inconvenient carrying, then portable electronic devices such as easy to carry notebook PCs and Tablet PCs are developed. Following the trend of light and thin the portable electronic device, number of components accommodated in a unit volume thereof also increases rapidly, and thus heat generated by a heat generating element must be effectively discharged to the outside through heat dissipating apparatus, so as to ensure the normal operation of the electronic device. Fan is one of the most used heat dissipating apparatus, which blows off or extracts out hot air near the heat generating element via the fan, so that the heat generated by the heat generating element may be carried away by the nearby air and thereby achieve a heat dissipation effect.
Generally, a fan blade assembly of the fan uses a shaft portion thereof as a center for performing rotation so as to generate airflow. In order to prevent the shaft portion of the fan blade assembly from overly contacting and scrubbing with other components during the rotation and influencing the normal operation thereof or producing noise, the shaft portion is usually not completely fixed in an axial direction and has a movable route. However, when a user accidentally drops the portable electronic device, the fan blade assembly may produce a deflection shifting due to the existence of the aforementioned route, and may even thereby impacting other components adjacent thereto and resulting in a damage to the fan.
The invention provides a fan system capable of preventing a fan blade assembly from bumping into components adjacent thereto due to dropping an electronic device.
The invention provides a fan system suitable for an electronic device. The fan system includes a fan module and a fan protecting module. The fan module includes a base and a fan blade assembly. The base is disposed at the electronic device and has a chamber. The fan blade assembly includes at least one fan blade and a shaft portion. An end of the fan blade is fixed at the shaft portion. The shaft portion is rotatably contained in the chamber, so that the fan blade assembly is adapted to rotate in relative to the base around the shaft portion, and at least one first end of the shaft portion includes a material attractive to magnetic force. The fan protecting module includes an electromagnetic component and an accelerometer. The electromagnetic component is disposed at a position adjacent to the first end of the shaft portion. The accelerometer is disposed at the electronic device and coupled to the electromagnetic component. When the acceleration of the electronic device detected by the accelerometer is greater than a threshold value, the electromagnetic component generates a magnetic force applied to the first end of the shaft portion to prevent the shaft portion from overly shifting or deflecting.
The invention provides a fan system for an electronic device. The fan system includes a fan module and a fan protecting module. The fan module includes a base and a fan blade assembly. The base is disposed at the electronic device and has a chamber. The fan blade assembly includes at least one fan blade and a shaft portion, wherein an end of the at least one fan blade is fixed on the shaft portion, the shaft portion is rotatably contained in the chamber, so that the fan blade assembly is adapted to rotate in relative to the base around the shaft portion, and at least one first end of the shaft portion includes a material attractive to magnetic force. The fan protecting module includes an electromagnetic component disposed at a position adjacent to the first end of the shaft portion, and capable of receiving a signal corresponded to a dropping state and transmitted from the electronic device, so as to generate a magnetic force applied to the first end of the shaft portion to prevent the shaft portion from overly shifting or deflecting.
In view of the foregoing, the fan system of the invention has the accelerometer and the electromagnetic component. When the electronic device is being dropped, the accelerometer can detect an acceleration change of the electronic device and enable the fan protecting module to determine the electronic device is in a dropping state, and the electromagnetic component can accordingly generate the magnetic force to drive the shaft portion of the fan blade assembly to move and thereby leaning against the end surface of the base, so that the shaft portion is firmly fixed during the dropping of the electronic device. With this, the fan blade assembly and the shaft portion thereof may be prevented from bumping into the base or other components due to the dropping of the electronic device, and thus probability of damaging the fan module is lowered and durability of the fan module is enhanced.
In order to make the aforementioned and other features and advantages of the present application more comprehensible, several embodiments accompanied with figures are described in detail below.
The accompanying drawings are included to provide a further understanding of the application, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.
The fan blade assembly 114 includes multiple fan blades 114a and a shaft portion 114b. Each fan blade 114a is fixed at the shaft portion 114b with an end and forms a radial shape, and the shaft portion 114b is rotatably contained in the chamber 112c of the base 112. The fan blade assembly 114 is adapted to rotate in relative to the base 112 around the shaft portion 114b. Furthermore, the fan module 110 has a coil 116 and a magnet 118, the coil 116 and the base 112 are fixed to each other and constitute a stator, the magnet 118 and the fan blade assembly 114 are fixed to each other and constitute a rotor. When the coil 116 is energized to generate a magnetic force, the stator and the rotor may rotate in relative to each other via the magnetic force between the coil 116 and the magnet 118, so that the fan blade 114a generates a heat dissipation airflow for cooling the electronic device 50.
The fan protecting module 120 includes an electromagnetic component 122 and an accelerometer 124. The electromagnetic component 122 is, for example, a coil and disposed at a proper position adjacent to an end of the shaft portion 114b. The accelerometer 124 is disposed at the electronic device 50 depicted in
With a protective mechanism of the fan protecting module 120, when the electronic device 50 is being dropped, the accelerometer 124 can detect the acceleration change of electronic device 50 and enable the fan protecting module 120 to determine the electronic device 50 is in a dropping state, and the electromagnetic component 122 can accordingly generate the magnetic force to drive the shaft portion 114b of the fan blade assembly 114 to instantly move and to be abutted against the end surface 112a of the base 112, so that the shaft portion 114b is firmly fixed during the dropping of the electronic device 50 to be prevented from overly shifting, and in addition with the attraction of the magnetic force, the rotation of the shaft portion 114b may be kept on an axis thereof as far as possible without any deflection, so that the fan module 110 is protected. With this, the fan blade assembly 114 and the shaft portion 114b thereof may be prevented from bumping into the base 112 or other components due to the dropping of the electronic device 50, and thus probability of damaging the fan module 110 is lowered and durability of the fan module 110 is enhanced.
In the present embodiment, the protection mechanism of the fan protecting module 120 may further be set as the following. When the acceleration of the electronic device 50 detected by the accelerometer 124 is consistently greater than the threshold value A (viz. a time point marked by P in
In the above-mentioned embodiment, the diagram shown in
Referring to
In the present embodiment, the chamber 112c of the base 112 has a position limiting groove 112b therein, the shaft portion 114b has a position limiting structure 114c near the bottom end of the shaft portion 114b, and the position limiting structure 114c is position-limited within the position limiting groove 112b so as to prevent the fan blade assembly 114 from departing the base 112. In addition, in order to prevent the shaft portion 114b of the fan blade assembly 114 from overly contacting the peripheral wall of the chamber 112c during rotation and thereby influence the normal operation thereof or produce noise, a size of the position limiting groove 112b along a direction D has been designed as greater than a size of the position limiting structure 114c along the direction D, so that the position limiting structure 114c is not completely fixed in the direction D and has a movable route. The direction D is, for example, an axial direction of the shaft portion 114b, the end surface 112a of the chamber 112c is located within the position limiting groove 112b and perpendicular to the axial direction (direction D) of the shaft portion 114b. When the electronic device 50 is being dropped and triggers the protection mechanism of the fan protecting module 120, the magnetic force generated by the electromagnetic component 122 drives the position limiting structure 114c to move along the axial direction (direction D) of the shaft portion 114b and be abutted against the end surface 112a within the position limiting groove 112b, so as to firmly fix the shaft portion 114b and keep the center of rotation to be consistent with the axis without deflection, and thus prevent the fan blade assembly 114 from being overly shifted and deflected and thereby bumps into the components adjacent thereto due to an existence of the route of the position limiting structure 114c along the direction D.
As shown in
The electronic device 50 of the present embodiment, for example, has a display surface (e.g., display screen of the notebook computer or display screen of the Tablet PC). When the fan protecting module 120 triggers the protection mechanism, the electronic device 50 may display a warning signal through the display surface thereof, so as to inform the user that the fan protecting module 120 is currently executing a fan protection work, such that the user can clearly know the operation status of the electronic device 50.
Referring to
In summary, the fan system of the invention has the accelerometer and the electromagnetic component. When the electronic device is being dropped, the accelerometer can detect the acceleration change of the electronic device and enable the fan protecting module to determine the electronic device is in a dropping state, and the electromagnetic component can accordingly generate the magnetic force to drive the shaft portion of the fan blade assembly to move to a proper position and maintain the stability of the axis, so that the shaft portion is firmly fixed during the dropping of the electronic device. With this, the fan blade assembly and the shaft portion thereof may be prevented from bumping into the base or other components due to the dropping of the electronic device, and thus the probability of damaging the fan module is lowered and the durability of the fan module is enhanced. In addition, the protection mechanism of the fan protecting module may further be configured as the following. When the acceleration of the electronic device detected by the accelerometer is consistently greater than the threshold value within a predetermined length of time, the fan protecting module begins to determine the electronic device is in the dropping state, and then the electromagnetic component generates the magnetic force. With this, the fan protecting module may more accurately determine whether the electronic device is in the dropping state, so as to prevent the fan protecting module from false triggering the electromagnetic component to drive the shaft portion of the fan blade assembly into action when the electronic device is in the non-dropping state.
It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the application without departing from the scope or spirit of the application. In view of the foregoing, it is intended that the application cover modifications and variations of this application provided they fall within the scope of the following claims and their equivalents.
Number | Date | Country | Kind |
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102113305 | Apr 2013 | TW | national |