A seatbelt system comprising a buckle; a spool with a ratchet wheel and webbing that is windable onto or off of the spool as the spool rotates. A control mechanism is operatively engaged with a pawl located proximate the ratchet wheel. When the control mechanism is in a first condition, the pawl is disengaged from the ratchet wheel and the ratchet wheel and spool are rotatable to wind the webbing onto or off of the spool. When the control mechanism is in a second condition, the pawl is moved into engagement with the ratchet wheel and the ratchet wheel and spool are only able to rotate the webbing onto the spool. The control mechanism includes electronic switches and sensors that have to be actuated along with engaging the locking tongue in the buckle in order to move the pawl into engagement with the ratchet wheel.

A seat belt device includes a spindle (11) for retracting a seat belt (13), an electric actuator (55), a pre-tensioner (14) and a power transmission mechanism (20), wherein the power transmission mechanism (20) can reversibly switch the connection and disconnection between the electric actuator (55) and the spindle (11) before the pre-tensioner (14) is activated, while when the pre-tensioner (14) is activated. The power transmission mechanism (20) non-reversibly interrupts the connection between the electric actuator (55) and the spindle (11) via an elastic piece (60) when a torque difference between an actuator-side gear (80) and a spindle-side gear (82) becomes larger than a predetermined value.

Disclosed is an improved reel assembly for use in conjunction with an occupant restraint system. The assembly employs a dual locking arrangement whereby an occupant can be restrained during both major and minor incidents. After a minor incident, the reel assembly can be conveniently unlocked, without the need for accessing the push button, by applying counter tension to the webbing. After a major incident, the reel assembly remains locked until the occupant disengages the reel via a push button. When the reel assembly experiences the force of a major incident, rotation of the webbing shaft may be first partially arrested by the engagement of a first of two locking teeth on a locking dog with a first of two engagement surfaces on a geared end plate and subsequently completely arrested by the combined engagements of the first and second locking teeth with their respective first and second engagement surfaces.

When end lock has occurred in a seat belt retractor due to winding-up of a webbing, the end lock is easily and surely released. A stop part (6G) engages with a lock arm (40) displaced in a locking operation direction and stops the lock arm (40). A lock mechanism (9), in a state where the lock arm (40) stands still on the stop part (6G), starts operation with rotation in a pull-out direction (P) of a winding drum and stops rotation of the winding drum. A transmission mechanism (19) transmits rotation of the winding drum to the lock arm (40) and displaces the lock arm (40) in a release direction to release the engagement with the stop part (6G) is released between the time when operation of the lock mechanism (9) is started and the time when rotation of the winding drum is stopped. Release means (18) releases the engagement between the lock arm (40) and the stop part (6G) by the transmission mechanism (19).

In a webbing take-up device, an open portion is formed in the other side, in a direction about a rotational axis of a switch pawl, of a sensor holder. In a state where an engagement piece is positioned on the outside of the open portion, the switch pawl is rotated about a shaft to cause the engagement piece to enter in a window portion, so, a distal end of the engagement piece, bent in a hook shape, faces to a regulation wall in an axial direction of the shaft. It is not necessary to elastically deform the engagement piece when bringing the regulation wall and the engagement piece into facing. Therefore, the engagement allowance in the engagement piece with the regulation wall can be enlarged and the distal end of the engagement piece can be prevented from crossing over the regulation wall and moving toward the shaft side.

A switchable retractor system includes a retractor with a spool. The spool is rotatable in an extension direction for extending a web and in a retraction direction for retracting the web. A first clutch has an engaged state where the first clutch inhibits rotation of the spool in the extension direction and a disengaged state where the first clutch allows rotation of the spool in the extension direction. A release actuator actuates the first clutch into the disengaged state when actuated by a user to allow extension of the web. A second clutch has a locked state where the second clutch inhibits rotation of the spool in the retraction direction and an unlocked state where the second clutch allows rotation of the spool in the retraction direction. A tension actuator actuates the second clutch into the unlocked state when actuated to allow retraction of the web into the retractor.

Disclosed is an improved reel assembly for use in conjunction with an occupant restraint system. The assembly employs a dual locking arrangement whereby an occupant can be restrained during both major and minor incidents. After a minor incident, the reel assembly can be conveniently unlocked, without the need for accessing the push button, by applying counter tension to the webbing. After a major incident, the reel assembly remains locked until the occupant disengages the reel via a push button. When the reel assembly experiences the force of a major incident, rotation of the webbing shaft may be first partially arrested by the engagement of a first of two locking teeth on a locking dog with a first of two engagement surfaces on a geared end plate and subsequently completely arrested by the combined engagements of the first and second locking teeth with their respective first and second engagement surfaces.

A seat belt device includes a spindle (11) for retracting a seat belt (13), an electric actuator (55), a pre-tensioner (14) and a power transmission mechanism (20), wherein the power transmission mechanism (20) can reversibly switch the connection and disconnection between the electric actuator (55) and the spindle (11) before the pre-tensioner (14) is activated, while when the pre-tensioner (14) is activated. The power transmission mechanism (20) non-reversibly interrupts the connection between the electric actuator (55) and the spindle (11) via an elastic piece (60) when a torque difference between an actuator-side gear (80) and a spindle-side gear (82) becomes larger than a predetermined value.

The present application discloses a child safety seat and a safety belt adjustment system thereof. The safety belt adjustment system includes: an automatic retracting device including a retracting shaft and a retractor, the retracting shaft being configured to be connected to a safety belt, the retractor driving the retracting shaft to perform a retracting rotation, so as to tension the safety belt in a buckled state; and a first locking device including a drive button and a locking member; the drive button being configured to drive the retracting shaft to perform a release rotation. The locking member has a locked position. In the locked position, the locking member locks the retracting rotation of the retracting shaft.