Buckle and seatbelt device

Abstract

To provide a buckle that increases a product of a distance from a rotational shaft to a gravity center position of an inertial lever and mass, and can suppress a cost while reliably preventing disengagement of a tongue and the buckle due to inertial force.SOLUTION: A buckle 1 includes: a latch member 3 that engages with a tongue 2 and latches the tongue 2; an operation button 12 for releasing the latch of the tongue 2 by the latch member 3; a base 13 that rotatably supports the latch member 3; and a lever 18 that is rotatably supported by the base 13 and contacts the operation button 12 to prevent a movement of the operation button 12 in a release direction. The lever 18 comprises: a rotational shaft 18a that fits into a groove formed in the base 13; a pin 18c that contacts the operation button 12; and a weight part 18b in which a gravity center of the lever 12 is located. The weight part 18b includes a metal member 18m. A portion surrounding the metal member 18m of the weight part 18b, the rotational shaft 18a, and the pin 18c contain a resin.SELECTED DRAWING: Figure 1

Claims

1. a latch member that engages with the tongue to latch the tongue; an operation button for releasing the latch of the tongue by the latch member; a base that rotatably supports the latch member; a lever that is rotatably supported on the base and that abuts against the operation button to prevent the operation button from moving in a release direction; Equipped with The lever is A rotation shaft that fits into a groove formed in the base; A pin that contacts the operation button; a weight portion on which the center of gravity of the lever is located; having The weight portion includes a metal member, A buckle, wherein a portion of the weight portion surrounding the metal member, the pivot shaft, and the pin contain resin.

2. The buckle according to claim 1 , wherein a through hole extending in a short direction of the buckle is formed in the weight portion, and the metal member is inserted into the through hole.

3. The buckle according to claim 2 , wherein a protrusion is provided on an inner peripheral surface of the through hole.

4. The buckle according to claim 3 , wherein a recess is provided on an outer circumferential surface of the metal member, and the protrusion and the recess are fitted together.

5. Seat belts worn by passengers; a tongue movably supported on the seat belt; The buckle according to any one of claims 1 to 4, in which the tongue is engaged; A seat belt device comprising:

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