end 422 of the block member 42 moves to the bottom end of the inclined groove 416 of the latch 41 and the block end 424 of the block member 42 blocks the block portion 34 of the shackle 30 resulting in that the pivoting portion 32 of the shackle 30 cannot be axially moved and therefore the locking end 362 of the shackle 30 cannot be moved away from the second top hole 206 of the housing 20 the adjusting member 60 is mounted in the accommodation chamber 202 of the housing 20 including a tab 62 and a linking member 64 as shown in fig2 the tab 62 has a protrusion 622 coupled to the linking member 64 and a bottom side exposed out of the base 24 of the housing 20 for enabling the tab 62 to be driven by an external force to make the adjusting member 60 move between a first position where the protrusion 622 of the tab 62 is disengaged from the recess 418 of the latch 41 as shown in fig6 and therefore the latch 41 can be moved upwards and a second position where the protrusion 622 of the tab 62 is engaged with the recess 418 of the latch 41 as shown in fig9 and therefore the latch 41 cannot be moved upwards when a user would like to unlock the padlock 10 and the code to unlock the padlock 10 is set to two o 39 clock and fifty minutes as an example he she can rotate the driving wheel 43 c to move the third pointer 54 to point to arabic numeral 2 through the third transmission wheel.