that is when the lid 23 a is removed from the opening the upper end of the cancel rod 46 can be manually pressed down with this manual operation the cancel lever 44 pushes up the cancel pin 40 thereby to withdraw the lock lever 31 from the window 49 as will be clarified hereinafter under this condition the select member 5 is pivotal in a fore and aft direction without obstruction by the lock lever 31 the shaft 34 has at a middle portion thereof a projection 47 which is contactable with another projection 48 provided on the base plate 33 that is by contacting the projection 48 the projection 47 restricts the rotation of the shaft 34 about the axis of the same the cancel lever 44 is formed with a bracket 44 a that is useful when assembling of the cancel lever 44 in the lock unit 30 is made as is well understood from fig5 the window 49 of the case 1 is so sized as to permit a pivotal movement of the lock lever 31 therein and therefrom more specifically as is seen from fig4 the window 49 is framed and has the front and rear opposed inner walls 51 and.