A rack guide mechanism includes a rack guide disposed in a housing 11 so as to move freely to support a rack shaft 6, a lid 14 attached to housing 11, and an elastic member 20 between the rack guide and the lid, biasing rack guide 13 to rack shaft 6. Elastic member 20 is integrally formed and includes a first elastic portion 23 constantly sandwiched between rack guide 13 and lid 11 and a second elastic portion 24 sandwiched between rack guide 13 and lid 11 when rack guide 13 moves towards lid 11 by a predetermined distance. First elastic portion 23 is preferably tubular with two open ends and is preferably housed in a housing hole 27 of rack guide 13. Second elastic portion 24 preferably comprises a flange 26 extending radially outward from an end of first elastic portion 23, with a gap C between rack guide 13 and flange 26 in normal use.
Rack guide mechanism
2016-08-10
Patent
Electronic Resource
English