Horn switch of steering wheel and its pad mounting structure

Details Horn switch of steering wheel and its pad mounting structure Horn switch of steering wheel and its pad mounting structure

B - Operations, Transporting

60

Q

B60Q 5/00 (2006.01) B62D 1/04 (2006.01) H01H 3/02 (2006.01)

Patent

CA 2182776

The object of the present invention is to simplify a structure for mounting a bracket (5) for a pad on a metal core (3) of a steering wheel, and to reduce the number of contacts by controlling a movement of a one-piece switch pad (2) covering each spoke from its center up to a middle part thereof, in order to realize a low cost of production. A plurality of leg parts (4a), formed on the spoke (3c) of the metal core of the steering wheel, which extend generally parallel to a steering shaft, and a cross bar or a hold-down part (4b) that is formed bent from a tip of the leg part (4a) towards the center of the steering wheel, constitute a bridge or an engaging piece (4). The bracket (5) is disposed between the spoke (3c) of the metal core and the cross bar (4b) of the bridge (4). The bracket (5) has a contacting surface at a location at which it contacts the cross bar (4b). There are provided biasing means, for biasing the bracket (5) towards the cross bar (4b), which is installed between the bracket (5) and the spoke (3c) of the metal core, and positioning means (4c, 8a) for positioning the bracket (5) relative to an axis of the steering shaft. The compressed coiled springs for biasing the pad (2) towards a driver are installed at two locations of right and left parts (c, d) on a lower side of the pad (2), and at two locations (a, b) on an upper side thereof which are separate from each other with an interval greater than an interval between both operational ends on the lower side thereof. Contacts (7a through 7c) for the horn switch are installed at the one location of the middle part on the lower side of the pad, and at two locations of right and left parts on the upper side thereof.

Cette invention concerne une simplification d'une structure pour monter un support (5) pour un coussin sur un noyau métallique (3) d'un volant de direction, permettant de restreindre le mouvement d'un coussin intégré (2) à commutation couvrant la partie d'un volant de direction (1) du type à 4 rayons, partant du centre de celui-ci vers des portions intermédiaires des rayons, et de diminuer le nombre de contacts et les coûts de fabrication. Sur les rayons (3c) du noyau métallique du volant de direction, il y a un pont (élément de verrouillage) (4) qui est constitué d'une pluralité de pattes (4a) disposées sensiblement parallèlement à l'arbre de direction et une barre transversale (portion de retenue) (4b) formée aux portions d'extrémité libres des pattes (4a) de manière à être repliées vers le côté interne du volant de direction. Un support (5) est prévu entre les rayons (3c) du noyau métallique et la barre transversale (4b) du pont (4) et il a une surface de travail se superposant à la barre transversale (4b) du pont (4). Un moyen pour pousser le support (5) vers la barre transversale (4b) et un moyen (4c, 8a) pour positionner le support (5) par rapport à l'axe de l'arbre direction sont prévus entre la face de travail (8b) du support (5) et les rayons (3c) du noyau métallique. Des ressorts de compression en spirale poussant le coussin (2) vers le conducteur sont prévus aux portions d'extrémité droite et gauche (c et d) d'un côté inférieur du coussin (2) et aux deux portions supérieures latérales (a, b) de la plaquette, la distance entre les portions latérales supérieures (a, b) étant plus grande que celle entre les portions latérales inférieures (c, d), des contacts de commutateur (7a-7c) de klaxon étant prévus dans une portion centrale latérale inférieure du coussin et dans deux portions terminales latérales supérieures de celui-ci.

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