please referring to fig2 a , the multi - direction switch according to the invention includes : a base dock 20 which is substantially a box type element with a bottom and an opening directing upwards . it has a plurality of electrode elements located therein . referring to fig2 b , the electrode elements include : a first to a fourth direction electrodes 31 - 34 located on a bottom side 201 of the base dock 20 . in a preferred embodiment , they are located at four corners of the bottom side 201 . the four direction electrodes 31 - 34 are flat conductive elements ( generally made of metal plate ), and have respectively a leg 311 , 321 , 331 and 341 extending outside the base dock 20 to connect to a circuit ( such as a circuit of a printed circuit board ); a compression electrode 35 located in the center of the base side 201 . it also is a flat conductive element and has a leg 351 extending outside the base dock 20 to connect to the circuit ( such as the circuit of the printed circuit board ); a common electrode 36 ( generally a common ground electrode ) located around the compressing electrode 35 . it also is a flat conductive element and has a leg 361 extending outside the base dock 20 to connect to the circuit ( such as the circuit of the printed circuit board ); a first conductive elastic blade 41 and a second conductive elastic blade 42 ( referring to fig2 a ) that are overlapped with each other and formed in a shape as a portion of a spherical surface . they have a center point p located above the compression electrode 35 . the center point p and the compression electrode 35 are not in contact with each other in normal conditions ( referring to fig4 a ). the second conductive elastic blade 42 has a peripheral bottom sinking into a trough formed on the bottom side 201 above the common electrode 36 ( referring to fig3 b ). the elastic blade 42 is in contact with the common electrode 36 in normal conditions . the center point p of the second conductive elastic blade 42 may be in contact with the compression electrode 35 when subject to compression ( referring to fig4 b ). in that condition the compression electrode 35 is connected to the common electrode 36 through the second conductive elastic blade 42 that generates a corresponding compression instruction signal through the electronic device connecting to the leg 351 ; a joystick 50 which has an operation stem 55 extending vertically upwards and first to fourth conductive legs 51 - 54 fixedly located around the operation stem 55 . the first to fourth conductive legs 51 - 54 are connected to the common electrode 36 through a bottom end 501 ( being conductive ) of the joystick 50 that is in contact with the first conductive elastic blade 41 in normal conditions . the main feature is that first to fourth conductive legs 51 - 54 have distal ends extending respectively in a biased manner towards the first to fourth electrodes 31 - 34 . however , in normal conditions , they are not in contact with the first to fourth electrodes 31 - 34 ( as shown in fig4 a ). when an user moves the operation stem 55 of the joystick 50 ( referring to fig3 c ), one or more of the first to fourth conductive legs 51 - 54 in the corresponding direction will be moved accordingly to connect to one or more of the first to fourth electrodes 31 - 34 corresponding to the moving direction of the joystick 50 . therefore , through the connection of the first to fourth conductive legs 51 - 54 , and the first conductive elastic blade 41 that is in contact with the bottom end 501 of the joystick 50 in normal conditions , and the second conductive elastic blade 42 , it is connected to the common electrode 36 , and through detecting the signal triggering conditions of the first to fourth electrodes 31 - 34 , the “ directional instruction ” input by the joystick 50 may be determined ; and an upper cap 60 has a flat surface 61 and an opening 62 formed in the center of the flat surface 61 to allow the operation stem 55 of the joystick 50 to pass through . there are a plurality of latch lugs 63 formed on the periphery of the flat surface 61 each has an aperture 631 engageable with a reverse hook 21 extending from the periphery of the base dock 20 . therefore the upper cap 60 can encase the joystick 50 , and the first and second conductive elastic blades 41 and 42 on the base dock 20 ( referring to fig3 a ). as the first to fourth direction electrodes 31 - 34 are located at the four corners of the bottom side 201 of the base dock 20 , whatever the downward displacement of the center point p of the first and second conductive elastic blades 41 and 42 , the biased distal ends , either extended at a sloped angle or a gradient , of the first to fourth conductive legs 51 - 54 can be moved towards the first to fourth direction electrodes 31 - 34 . hence the interval problem between the distal ends of the first to fourth conductive legs 51 - 54 and the first to fourth direction electrodes 31 - 34 may be improved . as a result , erroneous movements from the joystick 50 that cause mistaken contact between the first to fourth conductive legs 51 - 54 and the first to fourth direction electrodes 31 - 34 may be avoided . due to the distal ends of the first to fourth conductive legs 51 - 54 are designed in a biased manner , the interval between them and the first to fourth direction electrodes 31 - 34 may reach 0 . 3 mm or more in normal conditions . thus the oscillation amplitude of the joystick 50 may increase , and operation maneuverability improves , and fabrication and assembly difficulty may be reduced .