Abstract: A seat belt anchor device according to one aspect includes: an anchor plate including a loop attached portion for a seat belt webbing, and having an opening including an enlarged region into which a head of a stud is allowed to be inserted and a lock region in which the head of the stud is not allowed to enter from the enlarged region but a shank of the stud is allowed to enter; a protector attached to the anchor plate and including a bridge portion disposed over the enlarged region on a side opposite to a vehicle body with respect to the enlarged region so that the loop is held between the protector and the loop attached portion; and a stopper attached to the anchor plate and configured to engage with the head of the stud when the shank of the stud enters the lock region from the enlarged region.

Abstract: A seat belt retractor includes a vehicle acceleration sensor. The vehicle acceleration sensor includes a sensor holder including a placement surface and an attachment member to which the sensor holder is coupled. The attachment member is attached to the housing in a state in which the sensor holder is in either a first posture or a second posture. The sensor holder is configured to be coupled to the attachment member at any one of a plurality of angular positions. The plurality of angular positions are positions of the sensor holder in a case where the sensor holder rotates around a rotation axis. A plurality of sensor attachment angles corresponding to the plurality of angular positions are different between the first posture and the second posture. The plurality of sensor attachment angles are angles, with respect to the housing, of the center line of the placement surface.

Abstract: A seat belt anchor device according to one aspect includes: an anchor plate including a loop attached portion for a seat belt webbing, and having an opening including an enlarged region into which a head of a stud is allowed to be inserted and a lock region in which the head of the stud is not allowed to enter from the enlarged region but a shank of the stud is allowed to enter; a protector attached to the anchor plate and including a bridge portion disposed over the enlarged region on a side opposite to a vehicle body with respect to the enlarged region so that the loop is held between the protector and the loop attached portion; and a stopper attached to the anchor plate and configured to engage with the head of the stud when the shank of the stud enters the lock region from the enlarged region.

Abstract: A seat belt anchor device according to one aspect includes: an anchor plate including a loop attached portion for a seat belt webbing, and having an opening including an enlarged region into which a head of a stud is allowed to be inserted and a lock region in which the head of the stud is not allowed to enter from the enlarged region but a shank of the stud is allowed to enter; a protector attached to the anchor plate and including a bridge portion disposed over the enlarged region on a side opposite to a vehicle body with respect to the enlarged region so that the loop is held between the protector and the loop attached portion; and a stopper attached to the anchor plate and configured to engage with the head of the stud when the shank of the stud enters the lock region from the enlarged region.

Abstract: A seat belt anchor device according to one aspect includes: an anchor plate including a loop attached portion for a seat belt webbing, and having an opening including an enlarged region into which a head of a stud is allowed to be inserted and a lock region in which the head of the stud is not allowed to enter from the enlarged region but a shank of the stud is allowed to enter; a protector attached to the anchor plate and including a bridge portion disposed over the enlarged region on a side opposite to a vehicle body with respect to the enlarged region so that the loop is held between the protector and the loop attached portion; and a stopper attached to the anchor plate and configured to engage with the head of the stud when the shank of the stud enters the lock region from the enlarged region.

Abstract: There is provided an acceleration sensor enabling precise positioning of a sensor lever of the acceleration sensor, for ensuring a stable operation of the acceleration sensor, and a seat belt retractor including the acceleration sensor. Shafts of a sensor lever projects from a base. The sensor lever is supported between supports of a sensor holder so as to be rotatable and shiftable in a rotation axis direction. The sensor lever is rotated by displacement of an inertia mass. A limiting portion of the sensor holder is brought into contact with contact portions of the sensor lever. The limiting portion limits shifting of the sensor lever in the rotation axis direction, so as to avoid contact between the base and the supports.

Abstract: A seat belt retractor instantly switchable between only winding of a webbing to winding and drawing-out of the webbing. Operation member 61 moves from a non-operation position E1 to an operation position E2, and locking mechanism 9 stops rotation of a winding drum in a drawing-out direction “P”. Movement member 70 moves an arrangement member 62 to a first position F1 or a second position F2, and arrangement member 62 arranges the operation member at the non-operation position E1 or the operation position E2. Urging means 63 urges the arrangement member 62 toward the first position F1. While winding a webbing 2, a second maintaining portion 77 of the movement member 70 maintains the arrangement member 62 at the second position F2. Release portion 78 of member 70 releases the arrangement member 62 toward a first portion 74, where the member 62 is kept at the first position F1.

Abstract: There is provided an acceleration sensor enabling precise positioning of a sensor lever of the acceleration sensor, for ensuring a stable operation of the acceleration sensor, and a seat belt retractor including the acceleration sensor. Shafts of a sensor lever projects from a base. The sensor lever is supported between supports of a sensor holder so as to be rotatable and shiftable in a rotation axis direction. The sensor lever is rotated by displacement of an inertia mass. A limiting portion of the sensor holder is brought into contact with contact portions of the sensor lever. The limiting portion limits shifting of the sensor lever in the rotation axis direction, so as to avoid contact between the base and the supports.

Abstract: Problems to be Solved A control member controlling a state of a retractor is rotated by correctly interlocking with rotation of a winding drum, with the use of an eccentric member rotating eccentrically together with the winding drum. Solution A rotational gear 82 rotates at a decelerated speed than that of a winding drum 10 by rotation of an eccentric member 81. A transmission mechanism 85 includes a plurality of transmission round holes 86 and a plurality of transmission protrusions 87 and transmits rotation of the rotational gear 82 to a control member 70. The plurality of transmission round holes 86 is formed in one of the rotational gear 82 and the control member 70 with 180 degrees or less intervals. The plurality of transmission protrusions 87 is formed on the other of the rotational gear 82 and the control member 70 with 180 degrees or less intervals, and respectively moves in the transmission round hole 86 when the rotational gear 82 rotates.

Abstract: A seat belt retractor instantly switchable between only winding of a webbing to winding and drawing-out of the webbing. Operation member 61 moves from a non-operation position E1 to an operation position E2, and locking mechanism 9 stops rotation of a winding drum in a drawing-out direction “P”. Movement member 70 moves an arrangement member 62 to a first position F1 or a second position F2, and arrangement member 62 arranges the operation member at the non-operation position E1 or the operation position E2. Urging means 63 urges the arrangement member 62 toward the first position F1. While winding a webbing 2, a second maintaining portion 77 of the movement member 70 maintains the arrangement member 62 at the second position F2. Release portion 78 of member 70 releases the arrangement member 62 toward a first portion 74, where the member 62 is kept at the first position F1.

Abstract: A seatbelt retractor includes: a take-up drum winding up a webbing thereon; a transmission member arranged coaxially with a rotation axis of the take-up drum, and including a plurality of convex portions protruding radially outward at a predetermined circumferential pitch on an outer periphery of at least one end of the transmission member so as to transmit a rotary driving force; and a fitting member including a fitting portion that receives the one end portion inserted therein and fits with the plurality of convex portions. Each convex portion has a trapezoidal cross section and two faces facing a circumferential direction, one face of which has an inclination angle with regard to a radial direction smaller than the other face has. The one face is configured to receive a load through the fitting member by rotary driving force transmitted in emergency larger than the other face receives.