Adjusting Device of Imitation Flame of Electric Fireplace

Abstract

An electric fireplace includes a casing, a screen, a flickering unit, a light emitting device, a flame imitation board, and an adjusting device. The casing includes a receiving chamber. The screen is disposed vertically in a front end of the receiving chamber. The flickering unit is disposed in the receiving chamber and behind the screen. The light emitting device is disposed in the receiving chamber and is configured to emit light towards the flickering unit. The flame imitation board is disposed in the receiving chamber and between the flickering unit and the screen and is movable in a vertical direction. The flame imitation board includes a central portion having a plurality of light transmitting portions. The adjusting device is configured to move the flame imitation board in the vertical direction and to change a height of the plurality of light transmitting portions.

1 . An electric fireplace comprising:
 a casing including a receiving chamber;   a screen disposed vertically in a front end of the receiving chamber;   a flickering unit disposed in the receiving chamber and behind the screen;   a light emitting device disposed in the receiving chamber and configured to emit light towards the flickering unit;   a flame imitation board disposed in the receiving chamber and between the flickering unit and the screen and movable in a vertical direction, wherein the flame imitation board includes a central portion having a plurality of light transmitting portions; and   an adjusting device configured to move the flame imitation board in the vertical direction and to change a height of the plurality of light transmitting portions.   
     
     
         2 . The electric fireplace as claimed in  claim 1 , wherein the adjusting device includes an operating shaft, a second motor, two gears, and two interlocking seats, wherein the operating shaft is pivotably received in the receiving chamber and extends in a horizontal direction, wherein the second motor is connected to the operating shaft and configured to drive the operating shaft to rotate, wherein the two gears are securely mounted on two ends of the operating shaft, respectively, wherein the two interlocking seats are securely mounted on two sides of the flame imitation board, respectively, and wherein each of the two interlocking seats includes a rack meshed with one of the two gears. 
     
     
         3 . The electric fireplace as claimed in  claim 2 , wherein each of the two interlocking seats includes a guiding plate having a rectilinear guiding groove receiving the operating shaft. 
     
     
         4 . The electric fireplace as claimed in  claim 3 , wherein the adjusting device further includes two positioning blocks and two positioning switches, wherein the two positioning blocks are disposed on upper and lower portions of the flame imitation board, wherein the two positioning switches are in electrical connection with the second motor and are securely mounted in upper and lower portions of the receiving chamber, respectively, and wherein the second motor is stopped when one of the two positioning switches contacts with one of the two positioning blocks. 
     
     
         5 . The electric fireplace as claimed in  claim 1 , wherein the casing includes two sidewalls, and wherein two rectilinear lateral mounting plate are respectively disposed on inner sides respectively of the two sidewalls and abut two sides of the flame imitation board. 
     
     
         6 . The electric fireplace as claimed in  claim 1 , wherein an upper mounting plate is disposed on a lower side of the top wall and abuts an upper end of the flame imitation board. 
     
     
         7 . The electric fireplace as claimed in  claim 2 , wherein the receiving chamber includes a connecting portion on a lower end thereof, wherein a light shielding plate is disposed on top of the connecting portion, wherein the flickering unit includes a shaft, a first motor, and a plurality of reflective plates, wherein the shaft is pivotably mounted in the receiving chamber, extends in a horizontal direction, and is located behind the screen, wherein the first motor is connected to the shaft and is configured to rotate the shaft, wherein the plurality of reflective plates is disposed on the shaft, and wherein rotation of the shaft causes a change in a reflection angle of each of the plurality of reflective plates. 
     
     
         8 . The electric fireplace as claimed in  claim 7 , further comprising a controller in electrical connection with the first motor and the second motor, wherein the controller is configured to control a rotating speed of the first motor and forward and reverse rotation and a rotating period of the second motor.