Fan

Abstract

The present disclosure provides a fan. The fan includes a fan main body, a circuit board, and an operating element. The circuit board is provided with a stepless adjusting member. The operating element is connected to the stepless adjusting member. The fan main body includes a first motor electrically connected to the circuit board and a fan blade connected to the first motor. The circuit board adjusts power output to the first motor when the operating element rotates and operates the stepless adjusting member. So as to adjust a rotating speed of the first motor. In this way, the user can adjust a desired wind speed of the fan blade according to a need, which solves the problem that the wind speed of the existing fan cannot be freely adjusted and improves the operating performance and the user experience.

What is claimed is: 
     
         1 . A fan, comprising a fan main body, a circuit board, and an operating element, wherein the circuit board is provided with a stepless adjusting member; the operating element is connected to the stepless adjusting member; the fan main body comprises a first motor electrically connected to the circuit board and a fan blade connected to the first motor; and
 the circuit board adjusts power output to the first motor when the operating element rotates and operates the stepless adjusting member.   
     
     
         2 . The fan according to  claim 1 , wherein the stepless adjusting member is a potentiometer or a rotary encoder switch. 
     
     
         3 . The fan according to  claim 2 , wherein the operating element is provided with a first insertion slot matched with a rotating handle in the rotary encoder switch, and the rotating handle of the rotary encoder switch is at least partially arranged in the first insertion slot. 
     
     
         4 . The fan according to  claim 3 , wherein the rotating handle is in an interference fit with the first insertion slot; an outer side wall of the rotating handle in the rotary encoder switch is at least partially a plane; two first convex blocks spaced apart from each other are formed on a side wall of the first insertion slot; and surfaces, away from a side wall surface of the first insertion slot, of the two first convex blocks are in contact with the plane. 
     
     
         5 . The fan according to  claim 3 , wherein skidproof stripes are arranged on an outer surface of the operating element. 
     
     
         6 . The fan according to  claim 5 , further comprising a base rotatably connected to the fan main body. 
     
     
         7 . The fan according to  claim 6 , further comprising a second motor arranged on the fan main body or the base to drive the fan main body to rotate, wherein the second motor is electrically connected to the circuit board; and the stepless adjusting member is a press switch encoder;
 a switch inside the press switch encoder is closed when the operating element is pressed; and the circuit board controls the second motor to rotate according to the closure of the switch in the press switch encoder.   
     
     
         8 . The fan according to  claim 7 , wherein the circuit board comprises a control board arranged on the base and an adapter board electrically connected to the control board; the stepless adjusting member is arranged on the adapter board; a first via hole corresponding to a position of the rotating handle is formed in the base; the rotating handle passes through the first via hole from the inside of the base and is connected to the operating element; the second motor is arranged on the base; and an output shaft of the second motor is connected to the fan main body. 
     
     
         9 . The fan according to  claim 8 , wherein a quantity of the fan blade is two, and the fan blades are spaced apart from each other; a quantity of the first motor is two; and each first motor is connected to one fan blade. 
     
     
         10 . The fan according to  claim 9 , wherein the two fan blades comprise an upper fan blade and a lower fan blade which are spaced apart from each other. 
     
     
         11 . The fan according to  claim 10 , wherein the fan main body further comprises a front mesh cover and a rear mesh cover connected to the front mesh cover to form an intermediate cavity; the fan blades are arranged in the intermediate cavity; the first motors are arranged on the rear mesh cover;
 a wiring slot is formed on a back surface of the rear mesh cover; a cover plate is set at a position of the wiring slot; a first wiring hole is formed in a bottom of the wiring slot; a second wiring hole is formed in the base; the circuit board is connected to the first motors through a wire; and one end of the wire is arranged in the wiring slot through the second wiring hole and the first wiring hole in sequence.   
     
     
         12 . The fan according to  claim 11 , wherein mounting slots for mounting the first motors are respectively formed in two ends of the wiring slot on the back surface of the rear mesh cover; a second via hole communicated with the mounting slots is formed in an inner wall of the rear mesh cover; the first motors are mounted in the mounting slots; output shafts of the first motors are connected to the fan blades through the second via hole; the first wiring hole is located on the mounting slots;
 the cover plate comprises two first cover bodies used in conjunction with the two mounting slots, and a connecting plate body located between the two first cover bodies; the two first cover bodies are respectively clamped in the two mounting slots; and the connecting plate body is covered at a notch of the wiring slot.   
     
     
         13 . The fan according to  claim 11 , wherein the front mesh cover comprises two circular mesh covers corresponding to the positions of the two fan blades and an intermediate mesh cover located between the two circular mesh covers; the intermediate mesh cover is clamped to a front side of the rear mesh cover;
 a plurality of second convex blocks are arranged on outer side walls of the circular mesh covers in a spacing manner; a clamping slot and a gap communicated with the clamping slot are arranged an inner side wall of the rear mesh cover; and the second convex blocks are rotatably arranged in the clamping slot after entering the gap.   
     
     
         14 . The fan according to  claim 11 , wherein the fan main body further comprises an air deflecting mesh component; the air deflecting mesh component comprises a pressing frame body, a connecting rod, upper and lower air deflectors arranged on the connecting rod in a spacing manner, and a peripheral frame body connected to the rear mesh cover;
 the front mesh cover is located inside the peripheral frame body; two ends of the air deflectors are provided with rotating parts; the pressing frame body is connected to the peripheral frame body to form two columns of rotating holes spaced apart from each other; the rotating parts are inserted into the rotating holes; and a poke rod for adjusting an angle of the air deflector is arranged on one side, far from the fan blades, of at least one of the air deflectors.   
     
     
         15 . The fan according to  claim 14 , wherein connectors are arranged on two sides of the rear mesh cover; and one end of each connector is detachably connected to the peripheral frame body. 
     
     
         16 . The fan according to  claim 15 , wherein strip-shaped holes are formed in two sides of the peripheral frame body; a first elastic buckle used in conjunction with the strip-shaped hole is arranged at one end of each connector; lengths of the first elastic buckles match lengths of the strip-shaped holes; and the first elastic buckles are arranged in the strip-shaped holes from an inner side of the peripheral frame body. 
     
     
         17 . The fan according to  claim 16 , wherein an embedding part is perpendicularly arranged at one end, far from the first elastic buckle, of each connector, and a plurality of second elastic buckles are arranged on the embedding part; second insertion slots are formed in two sides of the rear mesh cover; bayonets are arranged on the second insertion slots; the embedding parts are arranged in the second insertion slots; and the second elastic buckles are arranged in the bayonets. 
     
     
         18 . A clamping fan, comprising the fan according to  claim 1 . 
     
     
         19 . A neck fan, comprising the fan according to  claim 1 . 
     
     
         20 . A handheld fan, comprising the fan according to  claim 1 .