Fan device

A fan device comprises a front fan cover, a blade device, a rear fan cover and a rotary front net. The front fan cover is installed with a first motor and a second motor therewithin. The blade means is installed behind the front fan cover and secured to the center of the shaft of the first motor for being driven to rotate by the first motor. The rear fan cover is installed behind the front fan cover and the blade device. The rear fan cover is combined with the front fan cover. The rotary front net has many lattices. The rotary front net is properly connected to the shaft center of the second motor and is driven to rotate by the second motor. The front fan cover is installed with a fragrant piece groove, a mosquito-repellent incense piece groove and an electric heat piece, and a fan leg frame is pivotally mounted to the rear fan cover. Thereby, the output wind can be diffuse uniformly and smoothly. Further, a fragrant piece groove and a mosquito-repellent incense piece groove are installed, thus the people will not feel uncomfortable.

BACKGROUND OF THE INVENTION
 1. Field of the Invention
 The present invention relates to a fan device designed with double front
 nets, wherein the output wind an be diffuse uniformly and smoothly,
 further a fragrant piece groove and a mosquito-repellent incense piece
 groove are installed, thus the people will feel comfortable.
 2. Description of the Prior Art
 As shown in FIG. 1, the prior art fan is a case fan, a blade device driven
 to rotated by a motor is installed therewithin. Another front fan cover
 11a can be driven to rotate by another motor is installed in front of the
 blade 10a. The front fan cover 11a is formed as grids. In using the fan
 device, the wind will flow forward by the rotating blades 10a through the
 front fan cover 11a. Such kind of device may refer to Taiwan Patent No.
 146452, etc.
 However, in the aforesaid prior art fan structure, since it only designed
 with unique front fan cover 11a, the wind does not flow smoothly, thus
 people will feel uneasy. Moreover, in the prior art, the blades 10a and
 the front fan cover 11a are pivotally installed within an outer frame 12a
 so as to adjust the blades 10a to a different elevation angle. When the
 blades 10a and the front fan cover 11a are adjusted to an angle to output
 wind upwards, the wind will be hindered by the upper portion 13a of the
 outer frame 12a. Thus, the wind can not flow successfully. Moreover, the
 prior art fan device only has the function of outputting wind but has not
 contain the functions of fragrant device and the mosquito-repellent
 incense device.
 SUMMARY OF THE INVENTION
 Accordingly, the object of the present invention is to provide a fan device
 which has a special designed rotary front net with many lattices. By this
 net design, the output wind can be diffuse uniformly and smoothly.
 Another object of the present invention is to provide a fan device
 installed with a negative ion generator for adhering with dust so as to
 clean air.
 Another object of the present invention is to provide a fan device
 installed with a fragrant piece groove and a mosquito-repellent incense
 piece groove for being inserted by fragrant pieces and mosquito-repellent
 incense pieces, and an electric heating piece is adjacent to the grooves.
 The fragrant pieces or mosquito-repellent incense pieces will emit
 fragrant odor to flow outwards with the wind, so that the fan has the
 functions of a fragrant device and a mosquito-repellent incense device.
 A further object of the present invention is to provide a fan device design
 with an adjustable fan leg frame for adjusting the fan device to different
 elevation angle. However, the fan does not designed with an outer frame,
 therefore, irrespective of the fan device being adjusted to any
 orientation, it will not be hindered by the outer frame. As a result, the
 wind can be outputted successfully.
 The present invention will be better understood and its numerous objects
 and advantages will become apparent to those skilled in the art by
 referencing to the following drawings in which:

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
 As shown in FIGS. 2, 3A and 3B, the fan device of the present invention is
 disclosed. The fan device of the present invention includes a front fan
 cover 10, a blade device 20, a rear fan cover 30, a rotary front net 40
 and a leg frame 50. The front fan cover 10 is a hollow body. The through
 hole 11 is formed therewithin. Four supporting frames 12 fixing a first
 motor 13 are formed on the center of the through hole 11. A second motor
 14 is further installed on the front side of the first motor 13. A
 fragrant piece groove 15 and a mosquito-repellent incense piece groove 16
 can be installed on the front fan cover 10 (as that shown in FIG. 6). An
 electric heating piece 17 adjacent to the fragrant piece groove 15 and the
 mosquito-repellent incense piece groove 16 are securely installed on the
 front fan cover 10. The fragrant piece groove 15 and the
 mosquito-repellent incense piece groove 16 can be inserted with respective
 a fragrant piece 60 and a mosquito-repellent incense piece 16. The through
 hole 11 of the front fan cover 10 is installed with a fixing front net 18
 which is formed by a lattice and is formed between the first motor 13 and
 the second motor 14.
 The blade device 20 is installed behind the front fan cover 10 and is
 properly secured to the shaft center of the first motor 13 by screwing and
 other ways. The first motor 13 can be driven by a proper circuit (not
 shown) for driving the blade device 20 to rotate and output wind forward.
 The rear fan cover 30 is installed on the rear side of the front fan cover
 10 and the blade device 20. The rear side of the rear fan cover 30 is
 installed with a fixing rear net 32 which are buckled to the rear fan
 cover 30 by hooks 31 on the two sides thereof. The rear fan cover 30 is
 locked integrally to the front fan cover 10 by a plurality of screws 33.
 The rotary front net 40 is installed within the through hole 11 of the
 front fan cover 10 and is in front of the fixing front net 18. The rotary
 front net 40 has a plurality of lattices. A rotary disk 41 is installed
 between the rotary front net 40 and the second motor 14. The rotary disk
 41 is embedded in the shaft center of the second motor 14 by an embedding
 hole 42 and has two pins 43 in the front thereof. Two respective pin holes
 44 are formed on the rotary front net 40. The rotary front net 40 matches
 with the two pins 43 through the two pin holes 44. The second motor 14 can
 be driven by a proper circuit (not shown) for driving the rotary disk 41
 and the rotary front net 40 to rotate synchronously. A cover hood 45 is
 installed in front of the rotary front net 40 and a screw 46 is securely
 installed to the rear side of the cover hood 45. It is screwedly connected
 to the front end of the second motor 14 by screws 46 for preventing
 releasing of the rotary disk 41 and the rotary front net 40. When the
 cover hood 45 looses, the rotary front net 40 can be easily detached and
 attached.
 The fan leg frame 50 is installed on rear side of the rear fan cover 30 and
 has a "U" shape. Each of the two ends of the fan leg frame 50 matches with
 a respective pivotal seat 51 which are screwedly locked to rear side of
 the rear fan cover 30 by screws 52 (as shown in FIG. 7). As the fixing
 button is released, the fan leg frame 50 can be adjusted (as shown in FIG.
 5) for the purpose of adjusting different elevation angle of the fan.
 Moreover, in the present invention, a negative ion generator 60 can be
 further installed within the rear fan cover 30, which includes an anode
 pin plate 71, a cathode plate 72 and a frame 73. The anode pin plate 70,
 cathode plate 72 and frame 73 are fixed within the fan rear cover 30. A
 plurality of discharging pins 74 are installed on the anode pin plate 71.
 A plurality of through holes 75 are installed on the cathode plate 72. The
 discharging pins 74 of the anode pin plate 71 are correspondent to the
 exact centers of the through holes 75 of the cathode plate 72. A high
 direct current voltage is applied between the anode pin plate 71 and the
 cathode plate 72. Since the negative ion released from the discharging
 pins 74 to the cathode plate 72 will adhere to the dust particles pass
 through the two electrodes so that the particle is negative ionized so as
 to finally adhere to the positive anode pin plate 71. Thus the effect of
 cleaning air is achieved.
 In using the fan device of the present invention, the rotary fan 20 may
 draw air to flow forward through the fixing front net 18 and the rotary
 front net 40. The present invention is designed with a rotary front net 40
 with lattices, the output wind can be diffuse uniformly and smoothly, thus
 the people will not feel uncomfortable. The present invention is designed
 with a fixing front net 18 and a rotary front net 40, by this double nets
 design, the output wind can be diffuse uniformly and smoothly. Moreover,
 the present invention is design with an adjustable fan leg frame 50 for
 adjusting the fan device to a different elevation angle. However, the fan
 does not designed with an outer frame, therefore, no matter the fan device
 is adjusted to any orientation, it will not be hindered by the outer
 frame. As a result, the wind can be outputted successfully. Alternatively,
 the fragrant piece groove 15 and the mosquito-repellent incense piece
 groove 16 are installed on the front fan cover 10 for being inserted by
 fragrant pieces 60 and mosquito-repellent incense pieces 61, respectively.
 When the electric heating piece 17 is conducted and heated, the fragrant
 pieces 60 or mosquito-repellent incense pieces 61 will emit a fragrant
 odor and flow outward with the wind, so that the fan has the functions of
 a fragrant device and a mosquito-repellent incense device.
 Although the present invention has been described using specified
 embodiment, the examples are meant to be illustrative and not restrictive.
 It is clear that many other variations would be possible without departing
 from the basic approach, demonstrated in the present invention. Therefore,
 all such variations are intended to be embraced within the scope of the
 invention as defined in the appended claims.