7 engage the corresponding notches 42 of the driven discs 4 the locking plate is forced by the spring 8 to go upward at that time the numerals 21 of the dials which are aligned with the indicating lines 12 of the casing 1 are the correct numbers of the combination lock 200 moreover the slots 74 will be separated from the elements c or c 39 and the suitcase may be opened if any one of the dials 2 is not correctly dialed a notch 42 of a driven disc 4 will not engage with its corresponding protuberance 71 of the locking plate 7 thus the locking plate is unable to go upwards and the slots 74 are still engaged with the elements c or c 39 and the suitcase cannot be opened as shown in fig1 and 16 when the key type lock 400 is opened by a correct key not shown and the lock 200 are correctly dialed the positions of the protuberances 71 of the locking plate 7 are aligned with the notches 42 of the driven discs 4 thus the locking plate 7 will go upward to engage with the notches 42 of the driven discs 4 and the present lock may be opened further the fixing plate 5 may be moved to the left and dent 609 of each driven disc 4 may engage with a pillar 509 shown in fig2 of the casing 1 thus fixing the position of each driven disc 4 as shown in fig1 and 18 when the key type lock 400 is opened by a correct key not shown but the combination lock 200 are not dialed with correct numbers the positions of the protuberances 71 of the locking plate 7 will not align with the notches 42 of.