JP6371622B2 - Seat belt device - Google Patents

Description

  The present invention relates to a seat belt device in which a telescopic mechanism on which webbing is supported is expanded and contracted.

  There is a seat belt device including a belt reacher that moves an engagement portion of a webbing with a reacher head in the front-rear direction of a seat by expanding and contracting a plurality of rods constituting a telescopic mechanism (see Patent Document 1 below as an example). In such a telescopic mechanism, when the small-diameter rod is extended from the inside of the large-diameter rod, the proximal end portion of the small-diameter rod is brought into contact with the distal end portion of the large-diameter rod. Here, when the rods come into contact with each other, a collision sound is generated.

JP 2010-111294 A

  In view of the above facts, an object of the present invention is to obtain a seat belt device that can prevent or reduce the occurrence of collision noise between rods in a telescopic mechanism.

The seat belt device according to claim 1 is configured to include a webbing for restraining an occupant extending in a vertical direction of a vehicle seat and a cylindrical cylinder having a bush attached to a base end portion. The rod having a plurality of different rods is expanded and contracted by moving the small-diameter rod in the longitudinal direction relative to the large-diameter rod, and the webbing is supported on the distal end side of the rod having the smallest diameter. A telescopic mechanism, and a buffer member provided between the base end portion of the cylindrical body and the bush and sandwiched between the base end portion of the cylindrical body and the bush, and absorbs an impact caused by the movement of the rod; It is equipped with.

  In the seat belt device according to the first aspect, the occurrence of the collision noise between the rods caused by the movement of the rod of the telescopic mechanism can be prevented or reduced by the buffer member.

Moreover, in this seatbelt apparatus, since a buffer member is clamped by the base end of a cylinder and a bush, it is not necessary to fix a buffer member, and a buffer member can be attached easily.

The seatbelt device according to claim 2 is the seatbelt device according to claim 1 , wherein the buffer member is provided inside a base end portion of the rod, and the receiving side accommodated in the rod is configured as the seat belt device. The base end portion of the rod can be brought into contact with the buffer member.

In the seat belt device according to the second aspect , it is possible to prevent or reduce an impact sound generated when the rod on the accommodation side is accommodated in the rod.

The seatbelt device according to claim 3 is the seatbelt device according to claim 1 or 2 , wherein the cushioning member is provided at a base end portion of the rod and accommodates the rod. The shock-absorbing member can be brought into contact with the front end portion.

In the seatbelt device according to the third aspect , it is possible to prevent or reduce the impact sound generated when the rod is extended from the housing-side rod.

  As described above, in the seat belt device according to the present invention, it is possible to prevent or reduce the occurrence of collision noise between rods in the telescopic mechanism.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a rod having the largest diameter in the telescopic of the seat belt device according to the present embodiment, (A) shows an exploded perspective view before assembly, and (B) shows a perspective view after assembly. Yes. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a rod having the smallest diameter in the telescopic of the seat belt device according to the present embodiment, (A) shows an exploded perspective view before assembly, and (B) shows a perspective view after assembly. Yes. It is a sectional side view mainly showing the reacher device of the seat belt device concerning this embodiment. FIG. 4 is a cross-sectional plan view mainly showing a leecher device taken along line 4-4 in FIG. 3. It is a plane sectional view of the important section in the state where the 3rd rod was extended from the 2nd rod. It is a plane sectional view of the important section in the state where the 2nd rod was extended from the 1st rod. 1 is a perspective view showing a configuration of a webbing retractor and a reacher device of a seatbelt device according to the present embodiment and its surroundings. It is a perspective view corresponding to FIG. 3 which shows the state by which the expansion-contraction member of the leecher apparatus was extended. 1 is a front view of a seat belt device according to an embodiment and a seat to which the seat belt device is applied. FIG. 10 is a front view corresponding to FIG. 9 showing a state where the webbing is attached to the body of the passenger. It is a control block diagram of a drive means.

  Next, an embodiment of the present invention will be described with reference to FIGS. In each figure, the arrow FR indicates the front side of the seat 12, the arrow LH indicates the left side when viewed from the passenger 28 seated on the seat 12, and the arrow UP indicates the upper side of the seat 12.

<Configuration of the present embodiment>
As shown in FIG. 7, the seatbelt device 10 according to the present embodiment is provided corresponding to the seating position in the bench-type seat 12 of the rear seat of the vehicle. In the present embodiment, description will be made assuming that the seat belt device 10 corresponds to the seating position on the right side of the seat 12. The seat belt device 10 includes a webbing take-up device 14. The webbing retractor 14 includes a frame 18 that is fixed to the vehicle body on the rear side of the seat back 16 of the seat 12.

  The frame 18 includes a pair of side plates 20 facing the left and right direction of the seat 12, and a spool (not shown) is rotatable between the pair of side plates 20 around an axis whose axial direction is the left and right direction of the seat 12. Is provided. A longitudinal base end portion of the webbing 22 for occupant mounting is locked to the spool, and the webbing 22 is wound and stored on the outer peripheral portion of the spool by rotating the spool in the webbing winding direction. Further, the webbing take-up device 14 includes a mainspring spring that urges the spool in the webbing take-up direction, a lock mechanism that prevents rotation of the spool in the webbing pull-out direction in the event of a vehicle emergency, and a forced webbing take-up direction in the event of a vehicle emergency. A pretensioner mechanism and the like are provided for rotation.

  The webbing 22 passes through a slit 26 formed in the upper plate 24 of the frame 18 and is drawn to the upper side of the frame 18. Further, the webbing 22 passes through the upper side of the seat back 16 on the right side of the seating position of the occupant 28 in the seat 12, and is further pulled out to the lower side of the seat 12 along the front surface of the seat back 16 as shown in FIG. Has been. The front end side of the webbing 22 passes through the side (right side) of the seat 12 and is connected to an anchor plate 32 fixed to the vehicle body below the seat cushion 30 of the seat 12. Further, a tongue 34 is provided at the intermediate portion of the webbing 22 so as to be movable in the longitudinal direction of the webbing 22. Specifically, a slit is formed in the tongue 34, and the webbing 22 passes through the slit of the tongue 34.

  A buckle 36 is provided on the left side of the seat 12 where the occupant 28 is seated. The buckle 36 is provided in a slit that vertically penetrates the seat cushion 30, and the lower end of the buckle 36 is fixed to the vehicle body below the seat cushion 30. As shown in FIG. 10, the webbing 22 is attached to the body of the occupant 28 by inserting the tongue 34 into the buckle 36 while the webbing 22 is wound around the body of the occupant 28.

  On the other hand, as shown in FIG. 7, a leecher device 40 is provided above the seat back 16 of the seat 12. As shown in FIGS. 3 and 4, the leecher device 40 includes a housing 42, and a telescopic mechanism 44 is provided above the seat back 16 inside the housing 42. The telescopic mechanism 44 includes a first rod 92, a second rod 94, and a third rod 96 as rods.

  As shown in FIG. 3, the first rod 92 is provided inside the housing 42 and is held in the housing 42 by a holding member (not shown). Further, as shown in FIG. 1, the first rod 92 includes a cylindrical body 98. A pair of guide portions 100 is formed in the cylindrical body 98 (only one guide portion 100 is shown in FIG. 1). The guide portion 100 is formed by press-molding a part of the cylindrical body 98 inward in the radial direction. The guide portion 100 protrudes toward the radial inner side of the cylindrical body 98 inside the cylindrical body 98, and The outer surface of the body 98 is recessed. The pair of guide portions 100 are formed so as to face each other in the radial direction of the cylindrical body 98 and are elongated in the axial direction of the cylindrical body 98. A cylindrical or ring-shaped stopper piece 102 is inserted in the vicinity of the front end portion of the cylindrical body 98, and the front end portion of the cylindrical body 98 is narrowed radially inward along the front end of the stopper piece 102.

  A buffer member 104 made of rubber or a synthetic resin material having elasticity similar to that of rubber is provided at the rear end of the cylindrical body 98. The buffer member 104 includes a buffer unit 106. The buffer portion 106 has a plate shape whose thickness direction is along the axial direction of the cylindrical body 98, and a rectangular through hole 108 is formed at the center side thereof. A pair of connecting pieces 110 are formed on the outer periphery of the buffer portion 106. The pair of connecting pieces 110 are opposed to each other in the radial direction of the cylindrical body 98, and extend from the buffer portion 106 toward the rear side of the cylindrical body 98. A mounting portion 112 is formed at the rear end of the connecting piece 110. The attachment portion 112 is formed in a ring shape, and the outer peripheral shape of the attachment portion 112 is substantially the same as the outer peripheral shape of the cylindrical body 98. The buffer portion 106 and the connecting piece 110 are inserted from the rear end of the cylindrical body 98 into the cylindrical body 98, the connecting piece 110 is locked to the rear end portion of the cylindrical body 98, and the mounting portion 112 is fixed to the cylindrical body 98. It abuts on the rear end.

  A bush 114 is provided at the rear end portion of the cylinder body 98. The bush 114 is made of a synthetic resin material that is harder than the buffer member 104. The bush 114 includes an insertion portion 116. The insertion portion 116 is inserted into the cylindrical body 98 from the rear end of the cylindrical body 98. In this state, the cylindrical body 98 is partially squeezed radially inward, so that the insertion portion 116 of the bush 114 is connected to the connecting piece of the buffer member 104. 110 and the rear end of the cylindrical body 98 are locked.

  A clamping part 118 is formed at the rear end of the insertion part 116. The sandwiching portion 118 is set so that the outer peripheral shape is substantially the same as the outer peripheral shape of the cylindrical body 98 or slightly larger than the outer peripheral shape of the cylindrical body 98. The insertion portion 116 of the bush 114 is inserted from the rear end of the cylindrical body 98 so that the insertion portion 116 is locked to the connecting piece 110 of the buffer member 104, and the mounting portion 112 of the buffer member 104 is connected to the sandwiching portion 118 of the bush 114. It is clamped by the rear end of the cylindrical body 98. A through hole 120 having a rectangular cross section is formed in the bush 114 so as to penetrate in the axial direction of the cylindrical body 98.

  The second rod 94 includes a cylindrical body 98, a stopper piece 102, a buffer member 104, and a bush 114, and basically has the same configuration as the first rod 92, but the cylindrical body 98, the stopper piece 102, and the buffer member. 104 and the diameter of the bush 114 are set to be smaller than the diameter of the cylindrical body 98 of the first rod 92, the stopper piece 102, the buffer member 104, and the bush 114, and the second rod 94 is the same as that of the first rod 92. It is inserted into the cylindrical body 98.

  Further, the guide portion 100 of the cylindrical body 98 of the first rod 92 is fitted into the concave groove 114A of the bush 114 of the second rod 94 from the outside in the radial direction, whereby the second rod 94 is moved to the first rod 92. Rotation relative to the first rod 92 around the central axis of the first is blocked or restricted. Furthermore, the buffer member 104 of the second rod 94 includes a buffer portion 122 (see FIGS. 4 and 5B) instead of the mounting portion 112. The outer peripheral shape of the buffer portion 122 is set to be larger than the outer peripheral shape of the cylindrical body 98 of the second rod 94 and smaller than the outer peripheral shape of the cylindrical body 98 of the first rod 92, and It faces the stopper piece 102 in the cylindrical body 98 of one rod 92.

  On the other hand, as shown in FIG. 2, the third rod 96 includes a cylindrical body 124. The cylindrical body 124 is formed in a cylindrical shape having a smaller diameter than the cylindrical body 98 of the second rod 94. A pair of guide portions 126 are formed in the cylindrical body 124 by press-molding a part of the cylindrical body 124 radially inward. The guide portion 126 is recessed on the outer surface of the cylindrical body 124 and is elongated in the axial direction of the cylindrical body 124.

  On the other hand, a buffer member 128 formed of rubber or a synthetic resin material having elasticity similar to that of rubber is provided at the rear end portion of the cylindrical body 124. The buffer member 128 includes a pair of opposed pieces 130. The pair of opposed pieces 130 are opposed to each other in the radial direction of the cylindrical body 124, and a rectangular piece 132 is disposed between the pair of opposed pieces 130. A ring-shaped buffer portion 134 is formed at the rear ends of the pair of opposed pieces 130. The outer peripheral shape of the buffer portion 134 is set larger than the outer peripheral shape of the cylindrical body 124 of the third rod 96 and smaller than the outer peripheral shape of the cylindrical body 98 of the second rod 94. For this reason, when the pair of opposed pieces 130 are inserted from the rear end of the cylindrical body 98 and locked to the cylindrical body 98, the buffer portion 134 extends radially outward from the outer peripheral portion of the cylindrical body 124, The buffer part 134 is opposed to the stopper piece 102 in the cylindrical body 124 of the second rod 94 in the axial direction of the cylindrical body 124.

  A bush 136 is provided at the rear end of the cylindrical body 124. The bush 136 is made of a synthetic resin material that is harder than the buffer member 128. The bush 136 includes an insertion portion 138. The insertion portion 138 is inserted into the cylindrical body 124 from the rear end of the cylindrical body 124. In this state, the cylindrical body 124 is partially squeezed radially inward, whereby the insertion portion 138 of the bush 136 is opposed to the buffer member 128. Together with 130, the rear end of the cylindrical body 124 is locked.

  A clamping part 140 is formed at the rear end of the insertion part 138. The outer peripheral shape of the holding portion 140 is set to be larger than the outer peripheral shape of the buffer portion 134 of the buffer member 128 and smaller than the inner peripheral shape of the cylindrical body 98 of the second rod 94. When the insertion portion 138 of the bush 136 is inserted from the rear end of the cylindrical body 124, the buffer portion 134 of the buffer member 128 is clamped by the clamping portion 140 of the bush 136 and the rear end of the cylindrical body 124. A through hole 142 is formed through the bush 136 in the axial direction of the cylindrical body 124. The cross-sectional shape of the through hole 142 is a circle smaller than the through hole 120 formed in the bush 114 of the first rod 92 and the second rod 94.

  A concave groove 140A is formed in the clamping part 140 of the bush 136, and the guide part 100 of the cylindrical body 98 of the second rod 94 is fitted from the outside in the radial direction. Thereby, the rotation of the third rod 96 relative to the second rod 94 around the central axis of the second rod 94 is prevented or restricted.

  An insertion portion 52A of the reacher head 52 is inserted and fixed to the front end portion of the cylindrical body 124. As shown in FIG. 3, a through hole 54 penetrating in the front-rear direction of the seat 12 is formed above the first to third rods 92 to 96 in the reacher head 52. The webbing 22 is passed through the through hole 54, and the webbing 22 extends downward along the front surface of the seatback 16 on the front side of the leecher head 52 as shown in FIG. 7.

  As shown in FIG. 3, a motor 56 as a driving unit is provided below the telescopic mechanism 44, and a gear box 58 is provided on the side of the motor 56. A reduction gear train constituting a driving force transmission mechanism is accommodated in the gear box 58, and an output shaft of the motor 56 is connected to an input gear of the reduction gear train in the gear box 58. Further, as shown in FIGS. 3 and 4, the leecher device 40 includes a pinion gear 60 that constitutes a driving force transmission mechanism together with a reduction gear train in the gear box 58. The pinion gear 60 is connected to the output gear of the reduction gear train in the gear box 58. As shown in FIG. 4, when the driving force of the motor 56 is transmitted to the pinion gear 60 via the reduction gear train, the pinion gear 60 moves in the sending direction (arrow B direction in FIG. 4) or in the retracting direction (arrow C in FIG. 4). Direction).

  As shown in FIG. 11, the motor 56 is electrically connected to a battery 64 mounted on the vehicle via a control device 62. The control device 62 is electrically connected to a courtesy switch 66 that is turned on and off as the door on the right side of the seat 12 is opened and closed, and is also electrically connected to a buckle switch 68 provided on the buckle 36. . When ON / OFF of the courtesy switch 66 corresponding to the opening of the vehicle door and the subsequent closing of the door is input to the control device 62, the motor 56 is driven by the control device 62, whereby the pinion gear 60 is moved in the delivery direction. Is rotated to. On the other hand, when the buckle switch 68 detects that the tongue 34 has been inserted into the buckle 36, the motor 56 is driven by the control device 62, whereby the pinion gear 60 is rotated in the retracting direction.

  As shown in FIGS. 3 and 4, the leecher device 40 includes a flexible rack 70 that constitutes a driving force transmission mechanism together with a reduction gear train and a pinion gear 60 in the gear box 58 as a driving force transmission member. The flexible rack 70 is formed in an elongate shape that can be bent by a synthetic resin material, and the distal end side in the longitudinal direction of the flexible rack 70 has through holes 120 of the bushes 114 of the first rod 92 and the second rod 94 and The through-hole 108 of the buffer member 104 is penetrated.

  A rod-shaped portion 144 having a circular cross section extends from the tip of the flexible rack 70. The rod-shaped portion 144 passes through the through-hole 142 formed in the bush 136 of the third rod 96 and is inserted into the hole 146 formed in the rectangular piece 132. The rod-shaped portion 144 of the flexible rack 70 is held by the rectangular piece 132 by caulking the rectangular piece 132 while being inserted into the hole 146 of the rectangular piece 132.

  Also, as shown in FIG. 4, rack teeth are formed on one side surface of the flexible rack 70 in the width direction, and the rack teeth of the flexible rack 70 mesh with the pinion gear 60. When the pinion gear 60 is rotated in the delivery direction (in the direction of arrow B in FIG. 4) by the driving force output from the motor 56, the third rod 96 is pressed and moved to the front side of the seat 12 by the flexible rack 70. When the third rod 96 is extended for a certain length from the tip of the second rod 94, the second rod 94 is then extended from the tip of the first rod 92 to the front side of the sheet 12. On the other hand, when the pinion gear 60 is rotated in the retracting direction (the direction of arrow C in FIG. 4), the third rod 96 is pulled to the rear side of the seat 12 by the flexible rack 70. As a result, the third rod 96 is accommodated inside the second rod 94, and the second rod 94 is accommodated inside the first rod 92.

  Further, as shown in FIG. 3, the leecher device 40 includes a reel 72. The reel 72 is connected to a gear of a reduction gear train in the gear box 58, and is rotated in the drawing direction (direction of arrow D in FIG. 3) or the winding direction (direction of arrow E in FIG. 3) by the driving force of the motor 56. The When the pinion gear 60 is rotated in the delivery direction by the driving force of the motor 56, the reel 72 is rotated in the pull-out direction, and when the pinion gear 60 is rotated in the pull-back direction by the driving force of the motor 56, the reel 72 is rotated in the winding direction. Is rotated to.

<Operation and effect of the present embodiment>
When the passenger 28 gets on and off and the door of the vehicle is opened and seated on the seat 12, ON / OFF of the courtesy switch 66 accompanying the opening and closing of the door is input to the control device 62. Thus, when the motor 56 is driven by the control device 62, the pinion gear 60 is rotated in the delivery direction by the driving force of the motor 56, and the reel 72 is rotated in the pull-out direction. As a result, when the front end side of the flexible rack 70 is moved to the front side of the sheet 12, the third rod 96 of the telescopic mechanism 44 is moved to the front side of the sheet 12 with respect to the second rod 94.

  When the third rod 96 is extended from the tip of the second rod 94 for a certain length, the buffer portion 134 of the buffer member 128 of the third rod 96 is brought into contact with the stopper piece 102 of the second rod 94. In this state, when the third rod 96 is pressed by the flexible rack 70 and moved to the front side of the seat 12, the second rod 94 is extended from the front end of the first rod 92 to the front side of the seat 12. In this way, when the third rod 96 and the second rod 94 are extended to the front side of the seat 12 by a certain length from the tip of the first rod 92, the buffering member 104 of the second rod 94 is buffered. The portion 122 is brought into contact with the stopper piece 102 of the first rod 92. In the extended state of the telescopic mechanism 44, the reacher head 52 fixed to the tip of the third rod 96 is moved to the front side of the seat 12 from the upper end of the seat back 16.

  The webbing 22 is penetrated from the rear side of the seat 12 into the through hole 54 of the reacher head 52 and extends to the lower side of the seat 12 along the seat back 16. Therefore, as shown in FIG. 8, the reacher head 52 is moved to the front side of the seat 12 relative to the upper end of the seat back 16, so that the webbing 22 is located on the upper end side of the seat back 16 rather than the seat back 16. Moved to the front. As a result, the occupant 28 seated on the seat 12 can easily grasp the tongue 34 to mount the webbing 22.

  Here, as shown in FIG. 5, the third rod 96 is extended from the second rod 94 by a certain length, and the forward movement of the seat 12 with respect to the second rod 94 of the third rod 96 is prevented. At this time, the buffer portion 134 of the buffer member 128 of the third rod 96 is brought into contact with the stopper piece 102 of the second rod 94. For this reason, the bush 136 of the third rod 96 does not directly collide with the stopper piece 102 of the second rod 94, and the buffer member 128 is made of rubber or a synthetic resin material having elasticity similar to rubber. For this reason, the impact when the extension of the third rod 96 from the second rod 94 is blocked is absorbed by the buffer portion 134 of the buffer member 128, thereby preventing or reducing the occurrence of a collision sound. Further, as shown in FIG. 6, when the second rod 94 extends from the first rod 92 for a certain length, the forward movement of the seat 12 with respect to the first rod 92 of the second rod 94 is prevented. The The shock at this time is absorbed by the buffering portion 122 of the buffer member 104, thereby preventing or reducing the occurrence of a collision sound.

  Next, the tongue 34 is inserted into the buckle 36, and when this is detected by the buckle switch 68, the motor 56 is driven in reverse by the controller 62. As a result, the pinion gear 60 is rotated in the retracting direction, and the reel 72 is rotated in the winding direction. As a result, when the leading end side of the flexible rack 70 is moved to the rear side of the sheet 12, the third rod 96 of the telescopic mechanism 44 is pulled to the rear side of the sheet 12 by the flexible rack 70 and stored in the second rod 94. The second rod 94 is accommodated in the first rod 92. Thus, when the leecher head 52 returns to the original state together with the third rod 96 and the second rod 94, the webbing 22 is mounted so as to fit the body of the occupant 28, as shown in FIG.

  Here, as shown in FIG. 4, the third rod 96 is accommodated in the second rod 94, and the rear end of the bush 136 of the third rod 96 abuts against the buffer portion 106 of the buffer member 104 of the second rod 94. Then, the rearward movement of the seat 12 with respect to the second rod 94 of the third rod 96 is prevented. In this way, the rear end of the bush 136 of the third rod 96 does not directly collide with the bush 114 of the second rod 94, and the rear end of the bush 136 of the third rod 96 is the buffer member of the second rod 94. The shock when the bumper 104 collides with the buffer unit 106 is absorbed by the buffer unit 106. This can prevent or reduce the occurrence of collision noise.

  In addition, even when the second rod 94 is accommodated in the first rod 92 and the rearward movement of the seat 12 of the second rod 94 is prevented, the rear end of the bush 114 of the second rod 94 is connected to the first rod 92. There is no direct collision with the bush 114. In addition, since the shock when the rear end of the bush 114 of the second rod 94 collides with the buffer portion 106 of the buffer member 104 of the first rod 92 is absorbed by the buffer portion 106, the occurrence of collision noise is prevented or reduced. it can.

  Moreover, the reacher device 40 of the seat belt device 10 according to the present embodiment is provided on the upper portion of the seat back 16 of the seat 12, and the first and second rods 94 and 96 move in the vicinity of the ears of the occupant 28. . For this reason, generation | occurrence | production of a collision sound in the vicinity of the passenger | crew's 28 ear | edge can be prevented or reduced, and the discomfort etc. which are given to the passenger | crew 28 by generation | occurrence | production of a collision sound can be prevented or reduced effectively.

  Further, the buffer portion 122 of the buffer member 104 of the second rod 94 is set smaller than the inner peripheral shape of the cylindrical body 98 of the first rod 92. For this reason, when the cylindrical body 98 of the second rod 94 is extended from the cylindrical body 98 of the first rod 92, the buffer portion 122 of the buffer member 104 is connected to the cylindrical body 98 of the first rod 92 and the second rod 94. It is not pinched by the pinching portion 118 of the bush 114. For this reason, the second rod 94 can smoothly extend from the first rod 92. The buffer portion 134 of the buffer member 128 of the third rod 96 is also set smaller than the inner peripheral shape of the cylindrical body 98 of the second rod 94. Therefore, the third rod 96 can be smoothly extended from the second rod 94 without being sandwiched between the cylindrical body 98 of the second rod 94 and the sandwiching portion 140 of the bush 136 of the third rod 96.

  Further, in the buffer member 104 of the first rod 92, the buffer portion 106 and the pair of connecting pieces 110 are inserted into the cylinder body 98 from the rear end of the cylinder body 98, and in this state, the mounting portion 112 of the buffer member 104 is the first. The rod 92 is attached by being sandwiched between the rear end of the rod 92 and the sandwiching portion 118 of the bush 114. For this reason, it is not necessary to fix the buffer member 104 to the cylinder body 98 or the bush 114 with an adhesive or the like, and the mounting of the buffer member 104 becomes easy. Further, the buffer member 104 of the second rod 94 and the buffer member 128 of the third rod 96 can be easily attached in the same manner.

  Further, the buffer member 104 of the second rod 94 includes a buffer portion 122 that comes into contact with the front end portion of the cylindrical body 98 of the first rod 92 when the second rod 94 is extended from the first rod 92, and When the third rod 96 is accommodated in the second rod 94, a buffer portion 106 is provided to which the bush 136 of the third rod 96 abuts. For this reason, one shock-absorbing member 104 prevents or prevents a collision sound when the second rod 94 is extended from the first rod 92 and a collision sound when the third rod 96 is accommodated in the second rod 94. Can be reduced.

  In addition, although this Embodiment was the structure which provided the buffer members 104 and 128 in the base end part of the 1st-3rd rods 92-96, installation of the buffer member in the 1st-3rd rods 92-96 is provided. The position may be, for example, the rear side of the stopper piece 102 in the first to third rods 92 to 96, and the installation position of the buffer member is not particularly limited.

  In the present embodiment, the buffer members 104 and 128 are sandwiched between the rear ends of the first to third rods 92 to 96 and the bushes 114 and 136. For example, the buffer members are the first to first rods. The configuration may be such that the three rods 92 to 96 are press-fitted from the rear end and fixed, and the buffer member is attached to the inner side of the rear end portion of the first to third rods 92 to 96 and the bushes 114 and 136 with an adhesive or the like. It may be fixed and is not particularly limited with respect to the fixing structure of the buffer member.

  Further, in the present embodiment, the present invention is applied to the seat belt device 10 for the seat 12 as a rear seat of the vehicle. However, the present invention may be applied to other seats such as a driver seat and a passenger seat.

  In the present embodiment, the reel 72 and the pinion gear 60 are configured to rotate with the same driving force of the motor 56. However, for example, the reel 72 is urged in the winding direction by the urging force of the urging means such as a spiral spring, and the pinion gear 60 that rotates by the driving force of the motor 56 resists the urging force of the urging means. It is good also as a structure which pulls out from the reel 72. FIG. In other words, the reel 72 may be rotated with a driving force different from the driving force of the motor 56 for rotating the pinion gear 60.

  Further, in the present embodiment, the base end side of the flexible rack 70 is wound around the reel 72, but winding means for winding up the base end side of the flexible rack 70 such as the reel 72, the flexible rack 70, and the like. It is good also as a structure which does not provide the storage means which stores the base end side of.

  In the present embodiment, the distal end of the flexible rack 70 is fixed to the proximal end of the third rod 96, and the third rod 96 is moved in the front-rear direction of the seat 12 with respect to the second rod 94 by the flexible rack 70. The configuration was However, for example, the front end of the wire is fixed to the base end of the third rod 96 and the front end side of the wire is moved in the front-rear direction of the seat 12 by the driving force of the motor 56, so The configuration for moving the third rod 96 relative to the second rod 94 is not limited to the flexible rack 70.

  In the present embodiment, the buffer members 104 and 128 and the bushes 114 and 136 are configured separately. However, for example, the buffer member and the bush may be integrally formed by two-color molding or the like and configured as one component.

DESCRIPTION OF SYMBOLS 10 Seat belt apparatus 12 Seat 44 Telescopic mechanism 92 Rod 94 Rod 96 Rod 98 Cylinder 104 Buffer member 114 Bush 124 Cylinder 128 Buffer member 136 Bush

Claims (3)

A webbing for restraining an occupant extending in a vertical direction of a vehicle seat;
It has a plurality of rods with different diameters configured to include a cylindrical tube with a bush attached to the base end , and the small-diameter rod is moved in the longitudinal direction relative to the large-diameter rod A telescopic mechanism in which the webbing is supported on the distal end side of the rod having the smallest diameter and being expanded and contracted by
A buffer member provided between the base end portion of the cylindrical body and the bush, sandwiched between the base end portion of the cylindrical body and the bush, and absorbing shock generated by the movement of the rod;
A seat belt device comprising: The buffer member is provided inside the proximal end of the rod, according to claim 1, a base end portion of the rod of the housing side which is accommodated in the rod is contactable to said buffer member Seat belt device. The buffer member is provided at the proximal end of the rod, according the the cushioning claim member is contactable 1 or claim 2 the distal end of the rod of the housing side for accommodating the rod seat Belt device.

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