(57) Abstract Constitution As for the doorknob latch device which relates to this device, ratsuFrom aperture 5 of tie-down plate 4 of chi itself 1, revolution of doorknob 21With the revolution of the hub 3 which is made to engage to axis 23, slender 2Head 2a as frequent appearance unrestricted, inside latch itself 1 the IndanthreneSleeve to provide da 2 unrestrictedly with sleeve means 6, slenderAs hub 3 is made to penetrate completely to hub complete penetration section 14 of 2, the friction markFirst top and bottom engagement section 12of a nda 2 and 12b, or secondIn top and bottom engagement section 13a and 13b person in charge union 17 of aforementioned hub 3To make engage, furthermore in side body 7 of latch itself 1 and 9 the hub holeThe hub receiving body 19 which in order to cover 8 and 10 it puts and 19In hub support hole 19a and 19a both ends of aforementioned hub 3 thatThe re it has made is made to support. Advantages As for the doorknob latch device which relates to this device, the doorWidth of installation place 22 of knob 21 being the narrow-width or wide headingExactly, in the center section of installation place 22 of this doorknob 21It can install doorknob 21.
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