Retractor and seat belt device

Abstract

To provide a retractor and a seat belt device, which can reduce occurrence of vibration sound.SOLUTION: A retractor 1 according to a first embodiment comprises a spool 2 that rolls up a webbing restraining an occupant, a base frame 3 that stores the spool 2 rotatably, and a lock mechanism 4 that restricts the spool 2 from rotating. The lock mechanism 4 comprises: a lock gear 41 arranged coaxially to be relatively rotatable with respect to the spool 2; a pawl 42 arranged to be engageable with the base frame 3; a fly wheel 43, arranged in the lock gear 41, which moves the pawl 42 by relatively moving the spool 2 and the lock gear 41; and a cushioning part 44 having elastic force, arranged between the fly wheel 43 and the lock gear 41.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a retractor and a seat belt device, and more particularly to a retractor and a seat belt device that can reduce the generation of vibration noise. [Background technology]

[0002] Vehicles such as automobiles are generally provided with a seat belt device that restrains an occupant in a seat that has a seat portion on which the occupant sits and a backrest portion located behind the occupant. Such a seat belt device includes a webbing that restrains the occupant, a retractor that winds up the webbing, a buckle located on the side of the seat, and a tongue located on the webbing, and the occupant is restrained in the seat by the webbing by fitting the tongue into the buckle.

[0003] Such a retractor often includes a spool that winds up the webbing, a base frame that rotatably houses the spool, a spring unit that applies a winding force to the spool, a vehicle sensor that detects sudden deceleration of the vehicle, a locking mechanism that is activated by the vehicle sensor to engage the spool with the base frame, and a pretensioner that removes slack from the webbing in an emergency such as a vehicle collision.

[0004] For example, Patent Document 1 discloses a portion of a blocking device equipped with a control disk as a locking mechanism. An inertial mass body is disposed on the control disk so as to be rotatable around a pivot axis. In the invention described in Patent Document 1, an L-shaped protrusion is disposed to abut against a contact surface formed on the outer edge of the inertial mass body in order to reduce noise (vibration noise) caused by the inertial mass body. The control disk is sometimes referred to as a lock gear, and the inertial mass body is sometimes referred to as a flywheel. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 5545910 Summary of the Invention [Problem to be solved by the invention]

[0006] However, as described in Patent Document 1, if the protrusion and the inertial mass body (flywheel) are left in contact with each other, it will hinder the rotational motion of the inertial mass body (flywheel), so it is necessary to provide a gap of at least some size, which will result in the generation of vibration noise.

[0007] The present invention has been made in view of the above problems, and has as its object to provide a retractor and a seat belt device that can reduce the generation of vibration noise. [Means for solving the problem]

[0008] According to the present invention, there is provided a retractor including a spool that winds up webbing for restraining an occupant, a base frame that rotatably houses the spool, and a locking mechanism that restricts rotation of the spool, wherein the locking mechanism includes a locking gear that is arranged coaxially with the spool and rotatable relative to it, a pawl that is arranged to be engageable with the base frame, a flywheel that is arranged on the locking gear and moves the pawl by relative rotation between the spool and the locking gear, and a buffer section that is arranged between the flywheel and the locking gear and has elastic force.

[0009] The locking mechanism may include a hook spring that biases the flywheel in a predetermined direction, and the buffer portion may be formed by a side portion of the hook spring.

[0010] The flywheel may include a support shaft that supports the axis of the hook spring.

[0011] The flywheel may have a recess or cutout that accommodates the hook spring so that a side of the hook spring facing the lock gear is exposed.

[0012] The lock gear may include a pivot shaft that supports the flywheel so that it can rotate, and a plurality of engaging claws arranged on the outer periphery of the pivot shaft, and the flywheel may include an insertion hole that is inserted into the pivot shaft, and an engaging hole that engages the engaging claws.

[0013] The plurality of engaging claws may include at least two engaging claws formed at opposing positions, and the opposing direction of the two engaging claws may be configured to intersect approximately perpendicularly with the axial direction of the hook spring.

[0014] The buffer portion may be configured by a leaf spring structure formed on one of the surfaces where the flywheel and the lock gear face each other.

[0015] The buffer portion may be formed of an elastic body disposed on one of the surfaces where the flywheel and the lock gear face each other.

[0016] The lock gear may have a recess or an opening formed at a position on the flywheel opposite to a position where the buffer portion is disposed.

[0017] According to the present invention, there is also provided a seat belt device comprising a retractor having any of the above-described configurations. [Effects of the Invention]

[0018] According to the retractor and seat belt device of the present invention described above, by disposing a buffer section with elastic force between the flywheel and the lock gear, the gap required to rotate the flywheel can be minimized. Even if the flywheel is tilted due to vibration, the buffer section can absorb the impact that occurs when it comes into contact with the flywheel, thereby reducing the generation of vibration noise. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a component exploded view showing a retractor according to a first embodiment of the present invention. FIG. [Figure 2] 2 is an enlarged partial view of the retractor shown in FIG. 1, where (A) shows the state in which the flywheel is assembled to the lock gear, and (B) shows the back of the flywheel. [Figure 3] 2(A) is a cross-sectional view taken along the line AA in FIG. 2(A), where (A) shows the flywheel in a balanced state, and (B) shows the flywheel in a tilted state. [Figure 4] 10A and 10B are diagrams showing modified examples of the flywheel, in which (A) shows the back of the flywheel and (B) shows a cross section including the flywheel. [Figure 5] 2(A), where (A) shows the first embodiment, (B) shows a first modified example, and (C) shows a second modified example. [Figure 6] 6A and 6B are partially enlarged views showing a retractor according to a second embodiment of the present invention, in which (A) shows a state in which a flywheel is assembled to a lock gear, and (B) is a cross-sectional view taken along the arrow BB in FIG. 6A. [Figure 7] 7A and 7B are partially enlarged views showing a retractor according to a third embodiment of the present invention, in which (A) shows a state in which a flywheel is assembled to a lock gear, and (B) is a cross-sectional view taken along the arrow BB in FIG. 7A. [Figure 8] 1 is an overall configuration diagram showing a seat belt device according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, an embodiment of the present invention will be described with reference to Figs. 1 to 8. Fig. 1 is an exploded view of a retractor according to a first embodiment of the present invention. Fig. 2 is a partially enlarged view of the retractor shown in Fig. 1, where (A) shows a state in which a flywheel is assembled to a lock gear, and (B) shows the back of the flywheel. For ease of explanation, the webbing has been omitted from Fig. 1.

[0021] As shown in FIG. 1, a retractor 1 according to a first embodiment of the present invention comprises a spool 2 that winds up a webbing for restraining an occupant, a base frame 3 that rotatably houses the spool 2, and a locking mechanism 4 that restricts the rotation of the spool 2. The locking mechanism 4 comprises a locking gear 41 that is arranged coaxially with the spool 2 and rotatable relative to it, a pawl 42 that is arranged to be engageable with the base frame 3, a flywheel 43 that is arranged on the locking gear 41 and moves the pawl 42 by the relative rotation between the spool 2 and the locking gear 41, a buffer section 44 that is arranged between the flywheel 43 and the locking gear 41 and has elastic force, and a locking base 45 that is arranged between the spool 2 and the locking gear 41.

[0022] The spool 2 is a winding drum that winds up the webbing, and for example, one end is rotatably supported by the spring unit 5, and the other end is connected to a locking base 45. The locking base 45 is rotatably supported by the retainer cover 6 via a cap 46 (bearing).

[0023] The spring unit 5 is a component that biases the spool 2 in the rewinding direction and has a built-in spiral spring. The retainer cover 6 is a component that houses the locking mechanism 4 and the vehicle sensor 47. The spring unit 5 and the retainer cover 6 are fixed to the base frame 3 directly or indirectly.

[0024] The retractor 1 may also have a pretensioner (not shown) that removes slack from the webbing in an emergency such as a vehicle collision. The pretensioner is disposed, for example, inside the base frame 3 adjacent to the locking base 45. The pretensioner may also be disposed outside the base frame 3 adjacent to the locking base 45, or inside the spring unit 5.

[0025] The base frame 3 is, for example, a frame structure having a substantially rectangular U-shaped cross section, with a pair of wall members forming side surfaces formed at both ends of a wall member forming the back surface. An opening is formed in the pair of wall members forming the side surfaces, through which the end of the spool 2 (including the locking base 45) is inserted, and engagement teeth 31 are formed on the inner peripheral surfaces. In addition, a tie plate forming the front surface may be connected to the tip of the pair of wall members forming the side surfaces.

[0026] The locking mechanism 4 is a mechanism that restricts the withdrawal of the webbing in an emergency such as a vehicle collision. The locking mechanism 4 is made up of components such as a lock gear 41, a pawl 42, a flywheel 43, a locking base 45, a cap 46, and a vehicle sensor 47. Note that the locking mechanism 4 is not limited to the configuration shown in the figure.

[0027] The locking base 45 is a generally disk-shaped component connected to the end of the spool 2. The locking base 45 is inserted into the opening of the base frame 3 and is positioned so that its outer periphery faces the engagement teeth 31. The locking base 45 has a thickness sufficient to accommodate the pawl 42, and a housing portion 45a that provides a space sufficient to accommodate the pawl 42 is formed on part of its outer periphery. The locking base 45 also has a shaft portion 45b that forms the rotation axis of the spool 2.

[0028] The vehicle sensor 47 includes, for example, a spherical mass body 47a, a sensor lever 47b that swings as the mass body 47a moves, and a sensor cover 47c that houses the mass body 47a and the sensor lever 47b. When the vehicle body decelerates or tilts by a predetermined value or more, the balance of the mass body 47a is lost and the sensor lever 47b is pushed upward, and the tip of the sensor lever 47b engages with the lock gear 41, restricting the rotation of the lock gear 41.

[0029] The pawl 42 has a first end 42a that is rotatably disposed on a protrusion formed on the locking base 45, and a second end 42b that is configured to be rotatable around the first end 42a. The second end 42b has a pin 42c that is inserted into a guide groove 41d formed in the lock gear 41, and an engagement claw 42d that can engage with the engagement teeth 31 of the base frame 3.

[0030] When the lock gear 41 rotates relative to the spool 2 (locking base 45), the pin 42c of the pawl 42 moves along the guide groove 41d, the second end 42b is pushed out radially from the side surface of the locking base 45, and the engagement claw 42d engages with the engagement tooth 31 of the base frame 3. This engagement locks the rotation of the spool 2, restricting the withdrawal of the webbing.

[0031] The second end 42b of the pawl 42 is biased radially inward by a pawl spring 42e so that the engaging claws 42d do not protrude radially outward from the side surface of the locking base 45.

[0032] The lock gear 41 includes, for example, a disk portion 41a disposed so as to face the locking base 45, an outer peripheral wall 41b erected outward along the outer edge of the disk portion 41a, and a center portion 41c inserted onto a shaft portion 45b of the locking base 45. A flywheel 43 is disposed in the space formed by the disk portion 41a and the outer peripheral wall 41b.

[0033] The disk portion 41a is formed with a guide groove 41d that guides the pin 42c of the pawl 42, a pivot shaft 41e that rotatably supports the flywheel 43, a plurality of engagement claws 41k arranged on the outer periphery of the pivot shaft 41e, and a protrusion 41f that positions the tip of the flywheel 43. The outer periphery of the outer wall 41b is formed with engagement teeth 41g that can engage with a sensor lever 47b of the vehicle sensor 47.

[0034] The flywheel 43 has a curved or bent shape that allows it to be inserted into the space surrounded by the disk portion 41a, outer peripheral wall 41b, and center portion 41c of the lock gear 41, and has a first end portion 43a located upstream in the relative rotation direction R and a second end portion 43b located downstream in the relative rotation direction R. A hook spring 48 is disposed at the first end portion 43a of the flywheel 43, and biases the flywheel 43 in the direction opposite to the relative rotation direction R.

[0035] The flywheel 43 also includes an insertion hole 43c formed in an intermediate portion between the first end 43a and the second end 43b, through which the pivot shaft 41e of the lock gear 41 is inserted, and a plurality of engagement holes 43d arranged along the outer periphery of the insertion hole 43c and engaging with the engagement pawls 41k of the lock gear 41. When the engagement holes 43d engage with the engagement pawls 41k, the engagement holes 43d are configured to restrict axial movement of the engagement pawls 41k and allow movement of the engagement pawls 41k in the pivoting direction.

[0036] 2(A), the engagement claws 41k include two engagement claws 41k, 41k formed at opposing positions, and are configured such that in the normal state (before relative rotation), the direction L1 in which the two engagement claws 41k, 41k face each other intersects approximately perpendicularly with the axial direction L2 of the hook spring 48. This configuration can stabilize the posture of the flywheel 43.

[0037] The number and arrangement of the engaging claws 41k are determined depending on conditions such as the shape and center of gravity of the flywheel 43, and are not limited to the configuration shown in the figure. For example, there may be three or more engaging claws 41k. The engaging holes 43d may be formed at positions corresponding to the respective engaging claws 41k, or may be formed wide enough to engage multiple engaging claws 41k together.

[0038] 2(A) and 2(B), the flywheel 43 includes a support shaft 43e that supports the axis of the hook spring 48, and a recess 43f that houses the hook spring 48 so that the side of the hook spring 48 facing the lock gear 41 is exposed. For ease of explanation, the support shaft 43e and the hook spring 48 that are hidden by the main body of the flywheel 43 are shown by dotted lines in FIG. 2(A).

[0039] One end of the hook spring 48 is inserted and supported by the support shaft 43e, and the other end is supported by a stopper 41h formed on the disk portion 41a of the lock gear 41. The stopper 41h is equipped with a support shaft that is inserted into the axis of the hook spring 48. By supporting both ends of the hook spring 48 by the support shaft 43e and the stopper 41h in this manner, the flywheel 43 is urged in the direction opposite to the relative rotation direction R.

[0040] 3A and 3B are cross-sectional views taken along the line AA in FIG. 2A, where FIG. 3A shows the flywheel in a balanced state and FIG. 3B shows the flywheel in a tilted state. For ease of explanation, the hook spring 48 is shown by a dotted line in FIG. 3A and FIG. 3B.

[0041] 3(A), with the hook spring 48 inserted into the support shaft 43e and placed in the recess 43f, the side of the hook spring 48 is exposed on the lock gear 41 side. The hook spring 48 is placed so as to be closer to the disk portion 41a of the lock gear 41 than other portions of the first end 43a of the flywheel 43.

[0042] 3(B), when the flywheel 43 tilts, the side of the hook spring 48 first comes into contact with the disk portion 41a of the lock gear 41. Furthermore, a flat portion 43g is formed on the portion of the support shaft 43e facing the lock gear 41, and an elastic force is applied to the side of the hook spring 48 by the gap formed by the flat portion 43g. That is, in this embodiment, the buffer portion 44 is formed by the side of the hook spring 48.

[0043] In the retractor 1 according to this embodiment, the gap required to rotate the flywheel 43 can be minimized, and even if the flywheel 43 is tilted due to vibration, the deflection of the hook spring 48 can absorb the impact that occurs when it comes into contact, thereby reducing the generation of vibration noise.

[0044] Here, Fig. 4 shows a modified example of the flywheel, where (A) shows the back of the flywheel and (B) shows a cross section including the flywheel. Note that Fig. 4(A) is a view corresponding to Fig. 2(B), and Fig. 4(B) is a view corresponding to Fig. 3(A).

[0045] As shown in Figures 4(A) and 4(B), the flywheel 43 may have a notch 43j on the first end 43a side that forms a space for accommodating the hook spring 48. In this modified example of the flywheel 43, the recess 43f shown in Figures 2(B) and 3(A) is omitted.

[0046] In this way, the flywheel 43 is formed so that the side of the hook spring 48 facing the lock gear 41 is exposed, and the support shaft 43e is formed so that the side of the hook spring 48 first comes into contact with the disk portion 41a of the lock gear 41 when the flywheel 43 is tilted, so that the presence or absence and shape of the recess 43f can be designed as desired.

[0047] 2A, (A) shows the first embodiment, (B) shows the first modified example, and (C) shows the second modified example. As shown in Fig. 2A and Fig. 5A, a recess 41i is formed in the disk portion 41a of the lock gear 41 that faces the second end portion 43b of the flywheel 43.

[0048] That is, the lock gear 41 has a recess 41i formed in a position opposite to the position where the buffer portion 44 of the flywheel 43 is disposed. With this configuration, even if the flywheel 43 is tilted toward the second end 43b, it is possible to avoid contact between the second end 43b and the lock gear 41, thereby further reducing the generation of vibration noise.

[0049] As in the first modified example shown in Fig. 5(B), an opening 41j may be formed in the disk portion 41a instead of the recess 41i. Furthermore, if the inclination of the flywheel 43 toward the second end 43b is small, as in the second modified example shown in Fig. 5(C), the recess 41i and the opening 41j may be omitted.

[0050] Next, a retractor 1 according to a second embodiment of the present invention will be described with reference to Figures 6(A) and 6(B). Figure 6 is a partially enlarged view showing a retractor according to the second embodiment of the present invention, where (A) shows a state in which a flywheel is assembled to a lock gear, and (B) is a cross-sectional view taken along the arrow BB in Figure 6(A). Note that the same components as those in the first embodiment described above are designated by the same reference numerals, and redundant description will be omitted.

[0051] 6(A) and 6(B), the buffer portion 44 is configured with a leaf spring structure formed on either the surface where the flywheel 43 faces the surface where the lock gear 41 faces. In the second embodiment, the side portion of the hook spring 48 on the lock gear 41 side is not exposed.

[0052] The flywheel 43 includes, for example, a notch 43h formed in a part of the outer edge, and a leaf spring 43i formed to extend from the side of the notch 43h along the surface of the disk 41a of the lock gear 41. A protrusion that abuts against the disk 41a is formed at the tip of the leaf spring 43i.

[0053] In this way, by forming elastic leaf spring portions 43i in parts of the flywheel 43 (two parts in the figure), a buffer portion 44 can be formed, and vibration noise caused by tilting of the flywheel 43 can be reduced. Note that the number, arrangement, and configuration of the leaf spring portions 43i are not limited to those shown in the figure. Also, the leaf spring structure may be formed on the disk portion 41a side of the lock gear 41.

[0054] Next, a retractor 1 according to a third embodiment of the present invention will be described with reference to Figures 7(A) and 7(B). Figure 7 is a partially enlarged view showing a retractor according to the third embodiment of the present invention, where (A) shows a state in which a flywheel is assembled to a lock gear, and (B) is a cross-sectional view taken along the arrow BB in Figure 7(A). Note that the same components as those in the first embodiment described above are designated by the same reference numerals, and redundant description will be omitted.

[0055] 7(A) and 7(B), the buffer portion 44 is configured by an elastic body 49 formed on one of the opposing surfaces of the flywheel 43 and the lock gear 41. In the third embodiment, the side of the hook spring 48 on the lock gear 41 side is not exposed.

[0056] The elastic body 49 is, for example, a spring with a small number of turns, and is arranged on the disk portion 41a facing the outer edge of the flywheel 43. Note that the number, arrangement, and configuration of the elastic body 49 are not limited to those shown in the figure. The elastic body 49 may also be arranged on the flywheel 43 side.

[0057] By disposing an elastic body 49 having elastic force between the flywheel 43 and the lock gear 41 in this way, a buffer section 44 can be formed, and the generation of vibration noise caused by tilting of the flywheel 43 can be reduced.

[0058] Although not shown, in the second and third embodiments described above, the disk portion 41a of the lock gear 41 facing the second end portion 43b of the flywheel 43 may be formed with a recess 41i shown in FIG. 5(A) or an opening 41j shown in FIG. 5(B).

[0059] Next, a seatbelt device according to one embodiment of the present invention will be described with reference to Fig. 8. Fig. 8 is an overall configuration diagram showing a seatbelt device according to one embodiment of the present invention. In Fig. 8, for the sake of convenience, components other than the seatbelt device are shown by dashed lines.

[0060] The seat belt device 100 according to this embodiment shown in FIG. 8 includes a webbing W for restraining an occupant, a retractor 1 for winding up the webbing W, a guide anchor 101 provided on the vehicle body side for guiding the webbing W, a belt anchor 102 for fixing the webbing W to the vehicle body side, a buckle 103 provided on the side of the seat S on which the occupant sits, and a tongue 104 provided on the webbing W, and the retractor 1 has, for example, the configuration shown in FIG. 1.

[0061] Below, we will briefly explain the components other than the retractor 1. The seat S includes, for example, a seat portion S1 on which the occupant sits, a backrest portion S2 located behind the occupant, and a headrest portion S3 that supports the occupant's head. The retractor 1 is built into, for example, a B-pillar P of the vehicle body.

[0062] In general, the buckle 103 is often placed on the side of the seat S1, and the belt anchor 102 is often placed on the underside of the seat S1. The guide anchor 101 is often placed on the B-pillar P. One end of the webbing W is connected to the belt anchor 102, and the other end is connected to the retractor 1 via the guide anchor 101.

[0063] Therefore, when the tongue 104 is fitted into the buckle 103, the webbing W is pulled out from the retractor 1 while sliding through the insertion hole of the guide anchor 101. Furthermore, when an occupant fastens the seat belt or releases the seat belt when getting out of the vehicle, the spring unit 5 of the retractor 1 acts to retract the webbing W until a certain load is applied.

[0064] Although the above-described seat belt device 100 has been described as being applied to the seat S arranged in the front seat of a vehicle, the seat belt device 100 may also be applied to the seat S arranged in the rear seat. Furthermore, the seat belt device 100 may also be applied to a seat belt device used in a vehicle other than a vehicle.

[0065] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention. [Explanation of symbols]

[0066] 1 Retractor 2 spools 3 Base Frame 4 Locking mechanism 5 Spring unit 6 Retainer cover 31 Engagement teeth 41 Lock Gear 41a Disc section 41b Outer wall 41c center 41d Guide groove 41e Swivel axis 41f Protrusion 41g engaging teeth 41h Stopper 41i recess 41j opening 41k engaging claw 42 Paul 42a First end 42b Second end 42c pin 42d Engagement claw 42e Paul Spring 43 Flywheel 43a First end 43b Second end 43c Insertion hole 43d Engagement hole 43e Support shaft 43f recess 43g flat part 43h Notch 43i Leaf spring part 43j Notch 44 Buffer section 45 Rocking Base 45a Storage section 45b Shaft 46 Cap 47 Vehicle Sensors 47a mass body 47b Sensor lever 47c Sensor cover 48 Hook Spring 49 Elastic Body 100 Seatbelt device 101 Guide Anchor 102 Belt anchor 103 Buckle 104 Tongs

Claims

1. A retractor including a spool for winding up a webbing for restraining an occupant, a base frame for rotatably accommodating the spool, and a locking mechanism for restricting rotation of the spool, The lock mechanism includes a lock gear arranged coaxially with the spool so as to be rotatable relative to the spool, a pawl arranged so as to be engageable with the base frame, a flywheel arranged on the lock gear and moving the pawl by the relative rotation between the spool and the lock gear, and a buffer unit having elastic force arranged between the flywheel and the lock gear. A retractor characterized by:

2. 2. The retractor according to claim 1, wherein the locking mechanism includes a hook spring that biases the flywheel in a predetermined direction, and the buffer portion is formed by a side portion of the hook spring.

3. 3. The retractor according to claim 2, wherein the flywheel includes a support shaft that supports the axis of the hook spring.

4. 4. The retractor of claim 3, wherein the flywheel has a recess or cutout that accommodates the hook spring so that a side of the lock gear of the hook spring is exposed.

5. 3. The retractor according to claim 2, wherein the lock gear includes a pivot shaft that pivotally supports the flywheel and a plurality of engagement pawls arranged on an outer periphery of the pivot shaft, and the flywheel includes an insertion hole through which the pivot shaft is inserted and an engagement hole into which the engagement pawls engage.

6. 6. The retractor according to claim 5, wherein the plurality of engagement claws include at least two engagement claws formed at opposing positions, and the opposing direction of the two engagement claws and the axial direction of the hook spring are configured to intersect approximately perpendicularly.

7. 2. The retractor according to claim 1, wherein the buffer portion is configured by a leaf spring structure formed on one of the surfaces where the flywheel and the lock gear face each other.

8. 2. The retractor according to claim 1, wherein the buffer portion is formed of an elastic body disposed on one of the surfaces where the flywheel and the lock gear face each other.

9. 2. The retractor according to claim 1, wherein the lock gear has a recess or an opening formed at a position on the flywheel opposite to a position where the buffer portion is disposed.

10. A seat belt device comprising the retractor according to any one of claims 1 to 9.

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