Abstract: Provided are a seat belt retractor and a seat belt device capable of suppressing an increase in frictional resistance when a pretensioner is steadily driven and increasing the resistance to be applied to a webbing when energy is absorbed. A seat belt retractor includes a guide member facing at least a part of an outer circumferential surface of a locking base and disposed along an opening portion. The guide member is configured not to come into contact with the locking base until a pretensioner is shifted to a steady driving state, is configured to come into contact with the locking base when the pretensioner is steadily driven, and is configured to allow contact between lock teeth and the locking base when subjected to a predetermined load after the pretensioner is shifted to the steady driving state.

Abstract: Provided are a seat belt retractor and a seat belt device capable of suppressing an increase in frictional resistance when a pretensioner is steadily driven and increasing the resistance to be applied to a webbing when energy is absorbed. A seat belt retractor includes a guide member facing at least a part of an outer circumferential surface of a locking base and disposed along an opening portion. The guide member is configured not to come into contact with the locking base until a pretensioner is shifted to a steady driving state, is configured to come into contact with the locking base when the pretensioner is steadily driven, and is configured to allow contact between lock teeth and the locking base when subjected to a predetermined load after the pretensioner is shifted to the steady driving state.

Abstract: Provided are a pretensioner, a retractor, and a seat belt device which can achieve both securing of the strength of a power transmission member in an initial driving stage and reduction of the sliding resistance against the power transmission member in a steady driving stage. The retractor 1 includes a spool 2 for winding up webbing for restraining an occupant and a pretensioner 3 for winding up the webbing in an emergency to remove slack. The pretensioner 3 includes a ring gear 31 connected to the spool 2 and a power transmission device 32 for transmitting power to the ring gear 31 in an emergency. The power transmission device 32 includes a rod-shaped power transmission member 32a which transmits power to the ring gear 31 while being plastically deformed. A tip end of the power transmission member 32a has an enlarged portion 32b formed thicker than other portions of the power transmission member 32a. The enlarged portion 32b is made of the same material as the power transmission member 32a.

Abstract: Provided are a pretensioner, a retractor, and a seat belt device in which strength and slidability of a rod-shaped power transmission member may both be achieved. A pretensioner includes a ring gear on which the spool is rotatably disposed, and power transmission units for transmitting power to the ring gear in an emergency. The power transmission units includes a rod-shaped power transmission member for transmitting power to the ring gear while being plastically deformed, a tip reinforcing member disposed on a tip side of the power transmission member, a pipe for containing the power transmission member, and a gas generator disposed at an end of the pipe. The tip reinforcing member has higher strength than the power transmission member.

Abstract: Provided are a pretensioner, a retractor, and a seat belt device that can effectively reduce kinetic energy of an injected power transmission member. A power transmission unit includes a power transmission member that is engageable with external teeth of the ring gear, a pipe that contains the power transmission member, a gas generator that is disposed at an end of the pipe, a piston that receives gas generated from the gas generator to press the power transmission member, a first stopper that is disposed on an upstream side of the power transmission member, a second stopper that is disposed between the power transmission member and the piston, and a pretensioner cover that defines a passage for the power transmission member.

Abstract: Provided are a seat belt retractor and a seat belt apparatus the number of components of which can be reduced and the size and weight of which can be reduced. A pretensioner 5 includes a rotor 51 that is connected coaxially with a spool 2 and that has a plurality of engaging teeth 51a formed on the outer periphery thereof, a power generating means 52 that engages with the engaging teeth 51a and rotates the rotor 51, and a cover member 53 that houses at least the rotor 51, and the cover member 53 is disposed inside the base frame 3, and can bear the spool 2.

Abstract: Provided are a pretensioner, a retractor, and a seat belt device that can effectively reduce kinetic energy of an injected power transmission member. A power transmission unit includes a power transmission member that is engageable with external teeth of the ring gear, a pipe that contains the power transmission member, a gas generator that is disposed at an end of the pipe, a piston that receives gas generated from the gas generator to press the power transmission member, a first stopper that is disposed on an upstream side of the power transmission member, a second stopper that is disposed between the power transmission member and the piston, and a pretensioner cover that defines a passage for the power transmission member.

Abstract: Provided are a pretensioner, a retractor, and a seat belt device in which strength and slidability of a rod-shaped power transmission member may both be achieved. A pretensioner includes a ring gear on which the spool is rotatably disposed, and power transmission units for transmitting power to the ring gear in an emergency. The power transmission units includes a rod-shaped power transmission member for transmitting power to the ring gear while being plastically deformed, a tip reinforcing member disposed on a tip side of the power transmission member, a pipe for containing the power transmission member, and a gas generator disposed at an end of the pipe. The tip reinforcing member has higher strength than the power transmission member.

Abstract: Provided are a seat belt retractor and a seat belt apparatus the number of components of which can be reduced and the size and weight of which can be reduced. A pretensioner 5 includes a rotor 51 that is connected coaxially with a spool 2 and that has a plurality of engaging teeth 51a formed on the outer periphery thereof, a power generating means 52 that engages with the engaging teeth 51a and rotates the rotor 51, and a cover member 53 that houses at least the rotor 51, and the cover member 53 is disposed inside the base frame 3, and can bear the spool 2.

Abstract: [Object] Quietness is to be more effectively improved, without compromising stability in power transmission. [Solution] An annular internal gear member 24 is formed of a noise suppressing material having lower strength than a metal. A deformation restricting portion 22d of an annular flange shape is formed along an outer circumferential edge of a carrier 22. Accordingly, when a planetary gear mechanism is operating the internal gear member 24 is partially deformed so as to protrude radially outward of the annular shape. At this point, the protruding deformed portion of the internal gear member 24 abuts against an inner circumferential surface of the deformation restricting portion 22d. Therefore, deformation of the internal gear member 24 is effectively restricted.

Abstract: [Object] Quietness is to be more effectively improved, without compromising stability in power transmission. [Solution] An annular internal gear member 24 is formed of a noise suppressing material having lower strength than a metal. A deformation restricting portion 22d of an annular flange shape is formed along an outer circumferential edge of a carrier 22. Accordingly, when a planetary gear mechanism is operating the internal gear member 24 is partially deformed so as to protrude radially outward of the annular shape. At this point, the protruding deformed portion of the internal gear member 24 abuts against an inner circumferential surface of the deformation restricting portion 22d. Therefore, deformation of the internal gear member 24 is effectively restricted.

Abstract: A seat belt retractor includes a cylindrical member, a torsionally deformable shaft arranged inside the cylindrical member and having one end side connected to the cylindrical member, a plate mounting member arranged in the cylindrical member and disposed on an outer periphery of the shaft, a locking mechanism for preventing a rotation of the plate mounting member, and a plate member having one end portion fixed to the plate mounting member and the other end portion engaging an inner periphery of the cylindrical member. The plate member is plastically deformable so that the plate member is wound onto the plate mounting member. The plate mounting member includes a first reducing radius portion having a radius gradually decreasing toward a downstream in a winding direction, and a second reducing radius portion located on the downstream side and having a radius reducing rate greater than that of the first reducing radius portion.

Abstract: A seat belt retractor includes a cylindrical member, a torsionally deformable shaft arranged inside the cylindrical member and having one end side connected to the cylindrical member, a plate mounting member arranged in the cylindrical member and disposed on an outer periphery of the shaft, a locking mechanism for preventing a rotation of the plate mounting member, and a plate member having one end portion fixed to the plate mounting member and the other end portion engaging an inner periphery of the cylindrical member. The plate member is plastically deformable so that the plate member is wound onto the plate mounting member. The plate mounting member includes a first reducing radius portion having a radius gradually decreasing toward a downstream in a winding direction, and a second reducing radius portion located on the downstream side and having a radius reducing rate greater than that of the first reducing radius portion.

Abstract: A seatbelt apparatus that is capable of improving seatbelt wearing operability may comprise a webbing, a tongue plate moveably attached to the webbing, which are provided with a grip portion to be gripped by an occupant and an engagement portion extending from the grip portion, and a buckle that receives and releases the engagement portion of the tongue plate for engagement and disengagement. A leather cover is applied to a front surface (corresponding to the palm of the occupant's hand for gripping) of the grip portion of the tongue plate.

Abstract: A buckle device that includes a buckle with which a tongue supported by a seat belt becomes engaged, and buckle-moving device which moves the buckle between a storage position at which the buckle is stored when the buckle is not used and a use position at which the buckle is retained in a used state in which the seat belt is fastened. The buckle may be hidden in the vehicle seat at the storage position. The buckle does not obstruct the occupant when the occupant sits on or gets off the vehicle seat, and the occupant can smoothly sit on or get off the vehicle seat.

Abstract: A seatbelt apparatus that is capable of improving seatbelt wearing operability may comprise a webbing, a tongue plate moveably attached to the webbing, which are provided with a grip portion to be gripped by an occupant and an engagement portion extending from the grip portion, and a buckle that receives and releases the engagement portion of the tongue plate for engagement and disengagement. A leather cover is applied to a front surface (corresponding to the palm of the occupant's hand for gripping) of the grip portion of the tongue plate.

Abstract: A buckle device that includes a buckle with which a tongue supported by a seat belt becomes engaged, and a buckle-moving device which moves the buckle between a storage position at which the buckle is stored when the buckle is not used and a use position at which the buckle is retained in a used state in which the seat belt is fastened, wherein the buckle-moving device is adapted to move the buckle between the storage position and the use position with a rotational movement, and wherein the buckle device further comprises a buckle-supporting member that is adapted to support the buckle and includes an external-force-reducing mechanism which reduces an external force applied to the buckle-supporting member if the external force is larger than a predetermined force, wherein the external-force-reducing mechanism is a buckle-moving device that allows the buckle to move in a fore-and-aft direction of a vehicle when the external force is applied to at least one of the buckle and the buckle supporting member in the

Abstract: A tongue may include an engaging strip to be inserted into and engaged with a buckle and a gripper for supporting the engaging strip. The gripper may include an upper cover that includes an upper surface portion which rises upward in a spherical shape, an upper surface portion of a planer shape formed continuously so as to incline from the upper surface portion of spherical shape, and an arcuate flange provided on the outer peripheral edge of the upper surface portion of spherical shape. An engaging strip of the tongue may project from an outer peripheral edge of the upper surface portion that has a planar shape. The gripper of the tongue may be formed generally into a round shape, which fits a palm of a passenger.

Abstract: A buckle device that includes a buckle with which a tongue supported by a seat belt becomes engaged, and buckle-moving device which moves the buckle between a storage position at which the buckle is stored when the buckle is not used and a use position at which the buckle is retained in a used state in which the seat belt is fastened. The buckle may be hidden in the vehicle seat at the storage position. The buckle does not obstruct the occupant when the occupant sits on or gets off the vehicle seat, and the occupant can smoothly sit on or get off the vehicle seat.

Abstract: A buckle is formed of a base having two side walls, a cover for accommodating and supporting the base, and having a tongue insertion hole formed at one end side of the two side walls of the base, and guide portions provided on each of the two side walls to protrude inwardly therefrom for leading a tongue to be inserted through the tongue insertion hole. The guide portions lead a tip of the tongue smoothly without blocking even when the tongue is inserted from the tongue insertion hole at a maximum slant posture defined by the tongue insertion hole relative to the buckle. The tongue can be smoothly inserted into the buckle to improve the manipulation feeling in inserting the tongue.