JP4861916B2 - Belt device - Google Patents

Description

  The present invention relates to a belt device in which a belt portion is capable of restraining an occupant by attaching the belt portion to an occupant of a vehicle.

  As a belt device, there is a belt device in which a tension transmission element having a belt coupling element coupled to a tip is extended from a cable deflector, and the tension transmission element is surrounded by a tubular body (see, for example, Patent Document 1).

  In this belt device, when the tension transmitting element is pulled into the cable deflector, the tubular body is deformed by the cable deflector, and the kinetic energy of the tension transmitting element is absorbed.

  By the way, in such a belt device, when the extension direction of the tension transmitting element from the cable deflector can be changed, in order to reduce the load on the cable deflector from the tension transmitting element, the tension transmission from the cable deflector is performed. It is preferable that the extension position of the element can be changed.

Here, when the extension position of the tension transmission element from the cable deflector can be changed, the cable when the tension transmission element is pulled into the cable deflector regardless of the extension position of the tension transmission element from the cable deflector. It is preferable that the deformation mode of the tubular body by the deflector can be made uniform.
Japanese Patent Laid-Open No. 10-6925

  In view of the above facts, an object of the present invention is to provide a belt device that can make the deformation mode of the energy absorbing member uniform regardless of the extension position of the belt portion from the interference member.

According to a first aspect of the present invention, there is provided a belt device that is attached to a vehicle occupant so that the occupant can be restrained. Provided in the belt portion, the reduction means provided to increase the restraining force of the occupant by the belt portion by reducing the extension amount of the belt portion from the interference member, When the means reduces the amount of extension of the belt portion from the interference member, the belt portion from the interference member absorbs the kinetic energy of the belt portion by being deformed by interference with the interference member. of the energy absorbing member extending position interferes angle on the interference member by being changed is changed, while being disposed between the energy absorbing member and the interference member, relative to the interference member Is the body, the energy absorbing member that is interposed between the energy absorbing member and the interference member when it is deformed by interference, extending of the belt portion from the interference member in the interference member Regardless of the position, when the energy absorbing member interferes with the interference member and is deformed , the angle of interference with the energy absorbing member is uniformed to uniformize the deformation mode of the energy absorbing member. Means.

A belt device according to a second aspect is the belt device according to the first aspect , wherein the movement of the uniformizing means with respect to the belt portion is limited, and the energy absorbing member is deformed by interference with the interference member. In this case, there is provided limiting means for permitting movement of the uniformizing means relative to the belt portion.
A belt device according to a third aspect is the belt device according to the first or second aspect, wherein the belt portion is inserted through the energy absorbing member and the uniformizing means, and The inner diameter is made larger than the diameter of the belt portion and smaller than the inner diameter of the energy absorbing member.

  In the belt device according to the first aspect, the belt portion is extended from the interference member, and the belt portion can restrain the occupant by being attached to the occupant of the vehicle.

  Further, the reducing means reduces the extension amount of the belt portion from the interference member, so that the restraining force of the occupant by the belt portion can be increased. Further, an energy absorbing member is provided in the belt portion, and when the reducing means reduces the extension amount of the belt portion from the interference member, the energy absorbing member is deformed by interfering with the interference member. The moving energy of the part is absorbed.

  Here, the extension position of the belt portion from the interference member can be changed, and the energy absorbing member interferes with the interference member regardless of the extension position of the belt portion from the interference member. The deformation mode of the energy absorbing member when being deformed is made uniform. For this reason, the deformation | transformation aspect of an energy absorption member can be equalized irrespective of the extension position of the belt part from an interference member.

Further , the uniformizing means is disposed between the interference member and the energy absorbing member, and when the energy absorbing member interferes with the interference member and is deformed, the uniformizing means moves between the interference member and the energy absorbing member. Intervening in between. For this reason, the structure which makes the deformation | transformation aspect of an energy absorption member uniform irrespective of the extension position of the belt part from an interference member can be simplified.

In the belt device according to the second aspect , the restricting means restricts the movement of the uniformizing means relative to the belt portion. For this reason, generation | occurrence | production of the noise by the movement with respect to the belt part of a uniformizing means can be suppressed.

  Furthermore, when the energy absorbing member interferes with the interference member and is deformed, the restricting means permits the movement of the uniformizing means relative to the belt portion. For this reason, it can suppress that a restriction | limiting means restrict | limits the reduction | decrease of the extension amount of the belt part from an interference member, and interference of the energy absorption member to an interference member.

  FIG. 1 is a side view of a passenger 14 (driver) riding state of a vehicle 12 configured by applying a seat belt device 10 as a belt device according to an embodiment of the present invention as viewed from the right side. FIG. 2 shows a side view of the vehicle 12 when the occupant 14 is not in the vehicle 12 as viewed from the right. Note that. In the drawing, the front side of the vehicle is indicated by an arrow FR, and the upper side is indicated by an arrow UP.

  In the vehicle 12 in the present embodiment, a substantially rectangular opening 16 is formed in the right and left walls of the vehicle body. The opening 16 opens the interior of the passenger compartment 18 outward in the vehicle width direction, and the occupant 14 can get on and off the vehicle 12 through the opening 16.

  A substantially rectangular cylindrical pillar 20 (center pillar) as a rear member is disposed on the vehicle rear side of the opening 16, and the pillar 20 constitutes the vehicle rear side surface of the opening 16, and the vehicle as it moves upward. It is inclined in the direction toward the rear. The lower end of the pillar 20 is fixed to a rocker 22 having a substantially rectangular tube shape as a lower member. The rocker 22 extends in the vehicle front-rear direction and constitutes the lower surface of the opening 16.

  A seat 24 is provided in the vehicle compartment 18 in the vehicle right side portion and the vehicle left side portion, and the seat 24 is movable in the vehicle front-rear direction at an installation position in the vehicle compartment 18. An opening 16 is disposed on the outer side in the vehicle width direction of the seat 24, and an occupant 14 who has boarded the vehicle 12 through the opening 16 can sit on the seat 24, and an occupant 14 who has left the seat 24 can It is possible to get off from the vehicle 12 through the opening 16.

  The vehicle 12 is provided with a seat belt device 10 corresponding to the seat 24.

  The seat belt device 10 is provided with a retractor 26 as a winding mechanism, and the retractor 26 is fixed to the lower end in the pillar 20. A long belt-like seat belt 28 as a belt constituting the belt portion is wound around the retractor 26 from the base end side. The seat belt 28 is given a biasing force in the winding direction around the retractor 26 by the retractor 26, and the seat belt 28 can be pulled out against the biasing force from the retractor 26, and the retractor 26. Can be wound up by the urging force.

  The retractor 26 is provided with a lock mechanism (not shown), and the lock mechanism can lock the withdrawal of the seat belt 28 from the retractor 26 in the event of an emergency (for example, a collision) of the vehicle 12. The retractor 26 is provided with a pretensioner mechanism (not shown), and the pretensioner mechanism can rapidly wind the seat belt 28 around the retractor 26 when the vehicle 12 is in an emergency. The retractor 26 is provided with a force limiter mechanism (not shown) having an energy absorbing material. When the vehicle 12 is in an emergency, the force absorbing mechanism is deformed from the retractor 26 by a deformation of the energy absorbing material due to a load acting on the seat belt 28. The withdrawal of the seat belt 28 is permitted.

  The seat belt 28 extends from the rocker 22 into the vehicle compartment 18 on the tip side of the retractor 26. The seat belt 28 is movably inserted in a lower portion of a shoulder anchor 30 as an upper support member in a portion disposed in the passenger compartment 18, and the shoulder anchor 30 extends in the vehicle longitudinal direction above the rocker 22 at the upper end. It is locked so as to be rotatable, and is disposed on the outer side in the vehicle width direction on the upper side of the seat 24 and on the rear side of the vehicle.

  The seat belt 28 is movably inserted in a tongue 32 as a mounting member on the distal end side from the shoulder anchor 30, and the tongue 32 is restricted from moving from the predetermined position of the seat belt 28 to the distal end side, The seat belt 28 can be disposed in the vicinity of the shoulder anchor 30 when the maximum amount of the seat belt 28 is wound on the retractor 26 (see FIG. 2).

  The tongue 32 can be attached to and detached from a buckle 34 as an attachment portion. The buckle 34 is provided on an upper part of an inner anchor 36 (wrap inner anchor) as an inner support member, and the inner anchor 36 is disposed at the lower end on the floor portion of the passenger compartment 18 on the inner side and the lower side of the seat 24 in the vehicle width direction. It is locked so as to be rotatable in the front-rear direction.

  The front end of the seat belt 28 is locked with a mini tongue 38 as a connecting member constituting the belt portion. The mini tongue 38 is a lap pre-function as an outer support member and a winding means shown in detail in FIGS. It is connected to a tensioner mechanism 40 (wrap outer anchor).

  The wrap pretensioner mechanism 40 is provided with a connector 42 (wrap outer connector) as a connecting portion constituting the belt portion, and a mini tongue 38 is locked (connected) on the upper portion of the connector 42 (wrap outer connector). Has been.

  An upper portion of a joint anchor 44 as a locking member constituting the belt portion is locked to the lower portion of the connector 42. A cylindrical compression cylinder 44A as a compression part is provided at the middle part in the vertical direction of the joint anchor 44, and a cylindrical support cylinder 44B as a support part is provided at the lower part of the joint anchor 44. The support cylinder 44B protrudes downward from the compression cylinder 44A.

  A tip (upper end) of a long wire 46 as an extending member constituting the belt portion is coupled to the inside of the compression cylinder 44A, and the wire 46 is inserted into the support cylinder 44B and allowed. It has flexibility.

  The base end (lower end) side of the wire 46 is inserted into a base cartridge 48 as a support member, and the base cartridge 48 has an upper surface compared to the upper surface of the rocker 22 on the outer side and the lower side of the seat 24 in the vehicle width direction. The lap pretensioner mechanism 40 is fixed to the rocker 22 by being fixed to the rocker 22 in a lowered state.

  A pair of interference plates 50 as interference members are provided on the vehicle rear side portion of the base cartridge 48, and the pair of interference plates 50 are each formed in a substantially semicircular plate shape and are opposed in the vehicle width direction. . A wire 46 is disposed between the pair of interference plates 50, and the wire 46 extends upward from the pair of interference plates 50. Between the vehicle front side portions of the pair of interference plates 50, a circular shaft-shaped limit shaft 62 as a limit member is bridged, and the limit shaft 62 is disposed on the vehicle front side of the wire 46. A tapping screw 52 as a restricting member is screwed to the pair of interference plates 50 at the rear end of the vehicle, and the tapping screw 52 is bridged between the pair of interference plates 50 and the vehicle of the wire 46. Located on the back side. The distal end portion of the wire 46 is rotatable between the pair of interference plates 50 in the vehicle front-rear direction with the proximal end portion as a center, so that the wire 46 can be tapped from a position where it abuts on the limiting shaft 62. In the range up to the position where the screw 52 abuts, the extending direction and the extending position of the wire 46 from the pair of interference plates 50 can be changed.

  A bottomed cylindrical cylinder 54 constituting a reducing means is provided at the front portion of the base cartridge 48 in the vehicle, and the base end of the wire 46 is inserted into the cylinder 54. A piston (not shown) constituting a reducing means is fixed to the proximal end of the wire 46, and the piston is fitted in the cylinder 54. The cylinder 54 communicates with a gas generator (not shown) that constitutes a reducing means. In the event of an emergency of the vehicle 12, the gas generator generates a high-pressure gas and flows it into the cylinder 54, so that the piston Is suddenly moved to the front side of the vehicle in the cylinder 54 and the wire 46 is suddenly drawn into the base cartridge 48. Thereby, the extension amount of the wire 46 from the pair of interference plates 50 is rapidly reduced.

  The distal end portion of the wire 46 is inserted into a cylindrical tube 56 as an energy absorbing member, and the tube 56 is an elastic member such as an elastomer (may be made of metal or resin) and moves relative to the wire 46. Inhibited (restricted).

  The distal end portion of the wire 46 is inserted between a tube 56 and a pair of interference plates 50 through a substantially annular plate-like spacer 58 as a uniformizing means. The spacer 58 is made of metal (for example, iron). ) Or resin, and the inner diameter is larger than the diameter of the wire 46 and smaller than the inner diameter of the tube 56. As shown in detail in FIG. 6, a predetermined number (eight in the present embodiment) of triangular prism-shaped engaging protrusions 60 (ribs) as a restricting means are formed on the inner peripheral surface of the spacer 58. The engaging protrusions 60 are arranged at equal intervals in the circumferential direction of the spacer 58. The predetermined number of engaging protrusions 60 are engaged with the wire 46, whereby the movement of the spacer 58 relative to the wire 46 is inhibited (restricted), and the state where the spacer 58 is in contact with the lower end of the tube 56 is maintained. In addition, the spacer 58 is prevented from coming into contact with the pair of interference plates 50 regardless of the position where the tip end portion of the wire 46 extends from the pair of interference plates 50.

  When the amount of extension of the wire 46 from the pair of interference plates 50 is suddenly reduced in an emergency of the vehicle 12, regardless of the engagement of the predetermined number of engagement protrusions 60 of the spacer 58 with the wire 46, The movement of the tube 56 and the spacer 58 relative to the wire 46 is permitted, and the tube 56 is inserted and supported in the support cylinder 44B of the joint anchor 44, and the tube 56 and the spacer 58 are paired with the compression cylinder 44A of the joint anchor 44. While being sandwiched between the interference plates 50, the tubes 56 interfere with the pair of interference plates 50 via the spacers 58 and are compressed and deformed (crushed), so that the tubes 56 reduce the movement energy of the wires 46. Absorbable.

  As shown in FIG. 1, when the tongue 32 of the seat belt 28 is attached to the buckle 34 in a state where the occupant 14 is seated on the seat 24, the portion between the shoulder anchor 30 and the tongue 32 of the seat belt 28. A shoulder belt portion 28A is mounted from the shoulder portion on the outer side in the vehicle width direction of the occupant 14 to the outer side in the vehicle width direction on the waist portion, and a lap belt portion 28B that is a portion between the tongue 32 and the mini tongue 38 of the seat belt 28 is provided. The seat belt 28 is attached to the occupant 14 by being attached to the waist of the occupant 14 in the vehicle width direction. At this time, the seat belt 28 is wound around the retractor 26 by the urging force applied by the retractor 26, so that the seat belt 28 is stretched, and the distal end portion of the wire 46 moves upward from the pair of interference plates 50. It extends in the direction toward the front of the vehicle. As a result, the front side portions of the seat belt 28 and the wire 46 (including the mini tongue 38, the connector 42, the joint anchor 44, and the tube 56) protrude into the opening 16.

  As shown in FIG. 2, when the tongue 32 of the seat belt 28 is detached from the buckle 34, the mounting of the seat belt 28 on the occupant 14 is released. At this time, the seat belt 28 is wound around the retractor 26 by the urging force applied by the retractor 26, so that the seat belt 28 is stretched, and the distal end portion of the wire 46 moves upward from the pair of interference plates 50. It extends in the direction toward the rear of the vehicle. As a result, the front end portions of the seat belt 28 and the wire 46 (including the mini tongue 38, the connector 42, the joint anchor 44, and the tube 56) are released from projecting into the opening 16, and the pillar 20 is moved inward in the vehicle width direction. Arranged (hidden).

  Next, the operation of the present embodiment will be described.

  In the seat belt device 10 having the above-described configuration, the seat belt 28 is attached to the occupant 14 by attaching the tongue 32 of the seat belt 28 to the buckle 34 with the occupant 14 seated on the seat 24.

  In an emergency of the vehicle 12, the locking mechanism of the retractor 26 locks the drawer of the seat belt 28 from the retractor 26, and the pretensioner mechanism of the retractor 26 rapidly winds the seat belt 28 around the retractor 26, thereby The restraining force of the occupant 14 (in particular, the shoulder belt portion 28A) is increased. Further, the force limiter mechanism of the retractor 26 allows the seat belt 28 to be pulled out of the retractor 26 by the deformation of the energy absorbing material due to the load acting on the seat belt 28 from the occupant 14, thereby acting on the occupant 14 from the seat belt 28. An excessive load is suppressed.

  Further, in the event of an emergency of the vehicle 12, the wrap pretensioner mechanism 40 causes the wire 46 to be rapidly drawn into the base cartridge 48, and the amount of extension of the wire 46 from the pair of interference plates 50 is rapidly reduced. The restraining force of the occupant 14 by the seat belt 28 (particularly the lap belt portion 28B) is increased. Further, the tube 56 is inserted and supported in the support cylinder 44B of the joint anchor 44, and the tube 56 and the spacer 58 are sandwiched between the compression cylinder 44A of the joint anchor 44 and the pair of interference plates 50. When the tube 56 interferes with the pair of interference plates 50 via the spacer 58 and is compressed and deformed, the tube 56 absorbs the movement energy of the wire 46 and a large impact load is applied from the pair of interference plates 50 to the connector 42. The action is suppressed and the connector 42 is protected.

  By the way, depending on the movement of the installation position of the seat 24 in the longitudinal direction of the vehicle, the physique of the occupant 14 wearing the seat belt 28, the vehicle type of the vehicle 12 on which the lap pretensioner mechanism 40 is installed, etc. When the extending direction of the wire 46 is changed and the extending position of the wire 46 from the pair of interference plates 50 is changed, the interference surfaces (spacers) of the pair of interference plates 50 on which the tube 56 interferes in the event of an emergency of the vehicle 12. The abutment surfaces of the pair of interference plates 50 with which the 58 abuts are changed, so that the interference direction of the tubes 56 to the pair of interference plates 50 (the direction in which the wires 46 extend from the pair of interference plates 50) and the tubes 56 are changed. The angle with the interference surface of the pair of interference plates 50 that interfere is changed.

  Here, when the vehicle 12 is in an emergency, the tube 56 interferes with the pair of interference plates 50 via the spacer 58 and is compressed and deformed as described above. For this reason, even if the angle between the interference direction of the tube 56 with respect to the pair of interference plates 50 and the interference surface of the pair of interference plates 50 with which the tube 56 interferes is changed, the tube 56 is substantially perpendicular to the upper surface of the spacer 58. It is possible to make contact, and the compression deformation mode of the tube 56 can be made uniform with a simple configuration. Accordingly, regardless of the extension position of the wire 46 from the pair of interference plates 50, the tube 56 can be efficiently compressed and deformed by the spacer 58, and the tube 56 can effectively absorb the movement energy of the wire 46. Thus, it is possible to effectively suppress a large impact load from acting on the connector 42 from the pair of interference plates 50.

  By the way, irrespective of the extension position of the wire 46 from the pair of interference plates 50, the angle between the interference direction of the tubes 56 with the pair of interference plates 50 and the interference surfaces of the pair of interference plates 50 with which the tubes 56 interfere is vertical. By doing so, the compression deformation mode of the tube 56 can be made uniform without providing the spacer 58. However, in this case, it is usually impossible to make the interference plate 50 into a large disk shape having no corners or slopes for the sake of compactness and space saving design. For this reason, the circumferential shape of the interference plate 50 is a shape with corners and slopes for convenience of attachment to the vehicle body and the seat 24, and the circumferential shape of the interference plate 50 for each vehicle type and position where the lap pretensioner mechanism 40 is attached. Therefore, it is impossible to design the tube 56 to be uniform in a compressive deformation manner regardless of the extending position of the wire 46 from the pair of interference plates 50. Thus, by providing the spacer 58 on the wire 46 between the tube 56 and the pair of interference plates 50, the wire 46 extends from the pair of interference plates 50 regardless of the circumferential shape of the interference plate 50. Regardless, the compression deformation mode of the tube 56 can be made uniform.

  Further, when the seat belt 28 is attached to the occupant 14, the wire 46 extends from the pair of interference plates 50 toward the front of the vehicle as it goes upward, and the front side portion of the seat belt 28 and the wire 46. Projected into opening 16 (including mini tongue 38, connector 42, joint anchor 44 and tube 56). For this reason, the passenger | crew 14 can mount | wear the seatbelt 28 favorably.

  On the other hand, when the seat belt 28 is released from the occupant 14, the wire 46 extends from the pair of interference plates 50 in the direction toward the rear of the vehicle so that the seat belt 28 and the wire 46 are The distal end portion (including the mini tongue 38, the connector 42, the joint anchor 44, and the tube 56) is released from the projection into the opening 16 and is disposed on the inner side in the vehicle width direction of the pillar 20. For this reason, the front end side portions (including the mini tongue 38, the connector 42, the joint anchor 44, and the tube 56) of the seat belt 28 and the wire 46 prevent the passenger 12 from getting in and getting out of the vehicle 12 through the opening 16. Can be suppressed.

  Further, the extension position of the wire 46 from the pair of interference plates 50 applies a load to the pair of interference plates 50 in a wide range from the position where the wire 46 contacts the limit shaft 62 to the position where the wire 46 contacts the tapping screw 52. It can be changed without any changes. For this reason, even if it changes the extension position of the wire 46 from a pair of interference board 50, it can suppress that the damage by the load from the wire 46 generate | occur | produces in a pair of interference board 50. FIG.

  Therefore, when the seat belt 28 is attached to the occupant 14, the direction in which the wire 46 extends from the pair of interference plates 50 (the direction in which the occupant 14 can satisfactorily attach the seat belt 28) and the seat belt 28 to the occupant 14. The direction in which the wire 46 extends from the pair of interference plates 50 when the mounting is released (the direction in which the tip end portion of the wire 46 is disposed on the inner side in the vehicle width direction of the pillar 20) is the tube 56 in an emergency of the vehicle 12. Thus, the lap pretensioner mechanism 40 can be installed in a wide variety of vehicles 12 while maintaining a state where it can be efficiently compressed and deformed without applying a load to the pair of interference plates 50.

  Further, in the lap pretensioner mechanism 40, the predetermined number of engagement protrusions 60 of the spacer 58 are engaged with the wire 46, so that the movement of the spacer 58 relative to the wire 46 is inhibited. For this reason, generation | occurrence | production of the noise by the spacer 58 moving with respect to the wire 46 and contact | abutting to a pair of interference board 50 can be suppressed.

  On the other hand, when the amount of extension of the wire 46 from the pair of interference plates 50 is sharply reduced in the event of an emergency of the vehicle 12, regardless of the engagement of the predetermined number of engagement protrusions 60 of the spacer 58 with the wire 46. The movement of the spacer 58 relative to the wire 46 is permitted. For this reason, it can suppress that the spacer 58 restrict | limits the reduction | decrease of the extension amount of the wire 46 from a pair of interference board 50, and interference of the tube 56 to a pair of interference board 50, and the tube 56 becomes a pair of interference board 50. Can be interfered with the spacer 58 interposed therebetween.

  In this embodiment, the spacers 58 are provided on the wires 46 as the uniformizing means. However, as the uniformizing means, a tube is used regardless of the extending direction of the wires 46 from the pair of interference plates 50. The angle between the interference direction of 56 of the pair of interference plates 50 (the direction in which the wire 46 extends from the pair of interference plates 50) and the interference surface of the pair of interference plates 50 with which the tube 56 interferes is a uniform inclination angle. It is good also as a structure.

  Further, in the present embodiment, the seat belt device 10 is configured to be a three-point support type (the seat belt 28 is provided with the shoulder belt portion 28A and the lap belt portion 28B). May be a two-point support type (a seat belt 28 provided with only a lap belt portion 28B).

  Further, in the present embodiment, the lap pretensioner mechanism 40 is provided on the outer side in the vehicle width direction of the seat 24. However, the lap pretensioner mechanism 40 is provided on the inner side in the vehicle width direction (inner anchor 36 side) of the seat 24. It is good also as a structure.

It is the side view seen from the right side which shows the passenger | crew riding state of the vehicle comprised by applying the seatbelt apparatus which concerns on embodiment of this invention. It is the side view seen from the right side which shows the crew member non-boarding state of vehicles constituted by applying the seatbelt device concerning an embodiment of the invention. It is the side view seen from the vehicle right side which shows the lap pretensioner mechanism in the seatbelt apparatus which concerns on embodiment of this invention. It is the side view seen from the vehicle right side which shows the state from which the extension direction from a pair of interference board of the wire was changed to the vehicle front side in the lap pretensioner mechanism in the seatbelt apparatus which concerns on embodiment of this invention. It is the side view seen from the vehicle right side which shows the state from which the extension direction from a pair of interference board of the wire was changed to the vehicle rear side in the lap pretensioner mechanism in the seatbelt apparatus which concerns on embodiment of this invention. It is a top view which shows the spacer of the lap pretensioner mechanism in the seatbelt apparatus which concerns on embodiment of this invention.

Explanation of symbols

10 Seat belt device (belt device)
12 Vehicle 14 Crew 28 Seat belt (belt part)
38 Mini tongue (belt part)
42 Connector (belt)
44 Joint anchor (belt part)
46 Wire (Belt)
50 Interference plate (interference member)
54 Cylinder (decreasing means)
56 Tube (energy absorbing member)
58 Spacer (uniformization means)
60 Engagement protrusion (limitation means)

Claims (3)

A belt portion that can be restrained by being attached to a vehicle occupant;
An interference member in which the belt portion is extended and the extension position of the belt portion can be changed;
Reducing means capable of increasing the restraining force of the occupant by the belt portion by reducing the amount of extension of the belt portion from the interference member;
Provided in the belt unit, together with the reducing means to absorb the movement energy of the belt portion with the interference to be deformed into an interference member in reducing the extension of the belt portion from the interference member An energy absorbing member in which an angle of interference with the interference member is changed by changing an extension position of the belt portion from the interference member ;
The interference member is disposed between the interference member and the energy absorbing member, and is separated from the interference member. When the energy absorbing member is deformed by interference with the interference member, the interference member and the energy are separated. by being interposed between the absorbent member and said energy absorbing member definitive when regardless of the extended position of the belt portion from the interaction member, the energy absorbing member in the interference member is deformed by interference Uniformizing means for equalizing the interference angle of the energy absorbing member and uniforming the deformation mode of the energy absorbing member,
A belt device comprising: Limiting means for restricting movement of the uniformizing means relative to the belt portion and permitting movement of the uniformizing means relative to the belt portion when the energy absorbing member interferes with the interference member and is deformed. belt according to claim 1, wherein the a. The belt portion is inserted into the energy absorbing member and the uniformizing means, and the inner diameter of the uniformizing means is larger than the diameter of the belt portion and smaller than the inner diameter of the energy absorbing member. The belt device according to claim 1 or 2.

Images