Seat belt apparatus

Abstract

The present invention provides a seat belt apparatus. The seat belt apparatus comprises: a seat belt retractor, which is mounted on a seatback of a seat and comprises a spool on which a seat belt webbing is wound; an inertia sensor, which is configured for detecting acceleration of a vehicle in a front-rear direction, and based on the detected acceleration, locking the rotation of the spool in a payout direction of the seat belt webbing; an attitude controller, which is configured for maintaining a reference plane of the inertia sensor in a horizontal orientation; and a clutch apparatus, which is connected to the spool and activates locking of the spool by the inertia sensor under a predetermined condition; further comprised is an unlocking apparatus, which, if the predetermined condition is not met, releases the clutch apparatus from locking the spool when the spool rotates in the payout direction of the seat belt webbing.

Description

Safety belt device TECHNICAL FIELD

[0001] The present invention relates to a safety device for a vehicle, and particularly to a safety belt device. BACKGROUND

[0002] As a safety device in a vehicle, a safety belt is used to restrain an occupant at the time of a collision, and to avoid a secondary collision of the occupant with a steering wheel, an instrument panel, or the like at the time of a collision, or to avoid the occupant from being thrown out of the vehicle at the time of a collision, resulting in death or injury. The safety belt for a vehicle, which is also called a seat belt, is an occupant restraint device. This safety belt is recognized as the most inexpensive and effective safety device, and many countries have made it compulsory to equip a safety belt in a vehicle.

[0003] The safety belt device includes a safety belt and a safety belt retractor that winds the safety belt. In the event of a collision of the vehicle or the like, when an acceleration in a horizontal direction of the vehicle is greater than a predetermined value, the acceleration is detected by an acceleration sensor, and thus a lock mechanism is triggered to actuate to cause the safety belt to be unable to be pulled out.

[0004] Nowadays, both a backrest portion and a seat cushion portion of a seat are movable, thereby providing a more comfortable seating angle for a passenger. Therefore, when the safety belt retractor including the acceleration sensor is installed on the backrest portion, the posture of the safety belt retractor needs to be adjusted according to the inclination angle of the backrest portion, thereby ensuring that the acceleration sensor after installation is not affected by the angle of the movable backrest portion of the seat to accurately detect the acceleration.

[0005] In consideration of an autonomous vehicle, in order to provide a seat with a better comfort, the seat is designed in a manner different from a conventional vehicle seat, for example, a seat cushion portion of the seat is designed to have a higher height, and for another example, a backrest portion of the seat is designed to have a larger range of inclination angles with respect to the seat cushion portion, i.e., the seat has a large adjustment angle range and a plurality of adjustment postures.

[0006] Therefore, it is desirable to provide a safety belt device capable of providing a comfortable experience for a passenger during adjustment of a seat in a manner of a large adjustment angle range and a plurality of adjustment postures. SUMMARY

[0007] An object of the present invention is to provide a safety belt device capable of providing a comfortable experience for a passenger during adjustment of a seat in a manner of a large adjustment angle range and a plurality of adjustment postures.

[0008] The present invention provides a safety belt device, comprising:

[0009] a safety belt retractor installed on a backrest portion of a seat, and including

[0010] a spool on which a seat belt is wound;

[0011] an acceleration sensor for detecting an acceleration of the vehicle in a front-rear direction, and, based on the detected acceleration, locking rotation of the spool in an extraction direction of the seat belt;

[0012] a posture controller for maintaining a reference plane of the acceleration sensor horizontal; and

[0013] a clutch device connected to the spool and activating locking of the spool by the acceleration sensor under predetermined conditions;

[0014] wherein,

[0015] the clutch device is further provided with an unlocking device for unlocking the spool from the acceleration sensor when the spool is rotated in the extraction direction of the seat belt under conditions other than the predetermined conditions.

[0016] According to an embodiment of the present application, the clutch device has a first engaging portion and a second engaging portion, the first engaging portion is connected to the spool in a torsion-proof manner, and when the spool is rotated in the extraction direction of the seat belt under the predetermined conditions, the first engaging portion rotates together with the spool, thereby driving the second engaging portion to move to switch the acceleration sensor from a non-engaged state to an engaged state, so as to lock rotation of the spool in the extraction direction of the seat belt; and

[0017] the unlocking device applies a force to the second engaging portion to move it away from the acceleration sensor.

[0018] According to an embodiment of the present application, the unlocking device is configured as a solenoid assembly, and the second engaging portion is moved toward a direction away from the acceleration sensor under the action of a magnetic force applied by the solenoid assembly.

[0019] According to an embodiment of the present application, the solenoid assembly directly applies the magnetic force to the second engaging portion.

[0020] According to an embodiment of the present application, the solenoid assembly includes a solenoid actuator, a return member, and a linkage member, the linkage member is moved from a first position to a second position against a return force applied by the return member under the action of a magnetic force applied by the solenoid actuator, and the second engaging portion is moved toward a direction away from the acceleration sensor in linkage with the linkage member.

[0021] According to an embodiment of the present application, the linkage member has a hook portion at one end, and the second engaging portion is positioned in the hook portion.

[0022] According to an embodiment of the present application, the electromagnetic valve assembly further includes a housing, and the first end of the linkage member is rotatably fixed to the housing, and

[0023] The reset member is configured as a spring, one end of which is fixed to the housing, and the other end of which is fixed to the first end of the linkage member.

[0024] According to an embodiment of the present application, the clutch device and the unlocking device are fixed to an end cap, and the core shaft is rotatably supported on the end cap.

[0025] According to an embodiment of the present application, the acceleration sensor includes a mounting bracket, an inertial ball, and a base including a support surface for holding the inertial ball, the base including a rocking shaft extending in a left-right direction of a vehicle and being held on the mounting bracket in a turnable manner in the front-rear direction via the rocking shaft;

[0026] The attitude controller is connected to a lower side of the base and is freely swingable to drive the base of the acceleration sensor to rock in the front-rear direction via the rocking shaft.

[0027] According to an embodiment of the present application, the first fitting portion of the clutch device is interference-fitted to an end portion of the core shaft;

[0028] and / or,

[0029] The second fitting portion of the clutch device is configured as a leg portion having a bent end, the acceleration sensor further includes an opposite fitting portion, and in the engaged state, the bent end of the leg portion is fitted to a tooth portion of the opposite fitting portion. BRIEF DESCRIPTION OF DRAWINGS

[0030] Features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings. In the drawings, like reference numerals denote like elements, in which:

[0031] FIG. 1 schematically shows a seat having a safety belt device according to the present application.

[0032] FIG. 2 schematically shows a safety belt device according to a first embodiment of the present application.

[0033] FIGS. 3 and 4 schematically show a safety belt device according to a second embodiment of the present application;

[0034] FIG. 5 schematically shows part of a safety belt device according to an embodiment of the present application. DETAILED DESCRIPTION

[0035] The following will describe a specific embodiment of the safety belt device according to the present application with reference to the accompanying drawings. The following detailed description and drawings are provided to illustrate the principles of the present application and are not intended to limit the application to the preferred embodiments described. The various embodiments described herein can be used alone or in any combination. The scope of the present application is defined by the claims.

[0036] In addition, spatially relative terms such as "upper", "lower", "left", "right", and the like, are used to describe the relative position of one element to another element as shown in the drawings. These spatially relative terms are used in accordance with the teachings of the present application to describe the relative position of one element to another element. It is understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the drawings. Thus, the spatially relative terms are used in accordance with the teachings of the present application to describe the relative position of one element to another element, and are not intended to limit the scope of the application to only the specific orientation described in the drawings.

[0037] FIG. 1 schematically shows a seat having the safety belt device of the present application. FIG. 2 schematically shows a safety belt device according to a first embodiment of the present application. FIG. 5 schematically shows part of the components of the safety belt device according to an embodiment of the present application.

[0038] As shown in FIG. 1, the present application provides a safety belt device 1, and the safety belt device 1 is to be installed on a seat. Specifically, referring to FIG. 2, the safety belt device 1 includes a safety belt retractor 100, which is installed on a backrest portion 3 of a seat and is used in cooperation with a safety belt to restrict a passenger to the seat, which can protect the passenger from being injured by colliding with the interior parts of the vehicle, for example, in the event of a collision. The seat cushion portion 2 of the seat is designed to be adjustable over a large angle range, and the backrest portion 3 of the seat is also designed to be adjustable over a large angle range, i.e., the seat has a large adjustment angle range and a plurality of adjustment postures.

[0039] As shown in FIG. 2, the safety belt retractor 100 includes a spool 10, an acceleration sensor 20, a posture controller 30, and a clutch device 40. These components of the safety belt retractor 100 will be described in detail below.

[0040] Note that the spindle is not clearly shown in FIG. 2 due to the obstruction of other members, but the approximate position of the spindle is still shown by a mark for the convenience of description. The spindle 10 is used to wind a seat belt (not shown), and the seat belt is wound on the spindle 10 when the spindle 10 is rotated in a first rotation direction, and the seat belt is pulled out from the spindle 10 when the spindle 10 is rotated in a second rotation direction opposite to the first rotation direction. In the embodiment shown in FIG. 2, the first rotation direction is a clockwise direction B, and the second rotation direction is a counterclockwise direction A. In one example, at one axial end of the spindle 10, a retractor spring can be connected, which is used to apply a force to the spindle 10 in the winding direction of the seat belt to rotate the spindle 10. At the other axial end of the spindle 10, as shown in FIG. 2, an acceleration sensor 20, a posture controller 30, and a clutch device 40 are provided. Optionally, as shown in FIG. 2, the seat belt retractor 100 further includes an end cover, and the spindle 10 is rotatably supported at one end on the end cover. Moreover, the acceleration sensor 20, the posture controller 30, and the clutch device 40 are all mounted on the end side of the end cover.

[0041] Note that the acceleration sensor 20 of the seat belt retractor 100 is used to detect the acceleration of the vehicle in the front-rear direction, and based on the detected acceleration, the rotation of the spindle 10 and thus the pulling-out action of the seat belt are locked, that is, the rotation of the spindle 10 in the above-described second rotation direction is locked. The posture controller 30 is used to keep the reference plane of the acceleration sensor 20 horizontal. Specifically, the posture controller 30 is used to always keep the reference plane of the acceleration sensor 20 slightly horizontal regardless of the change in the inclination angle of the backrest portion of the seat. The clutch device 40 is connected with the spindle 10 and activates the locking of the spindle 10 by the acceleration sensor 20 under predetermined conditions.

[0042] In the embodiment of the present application, the posture controller 30 can be configured as a weight block and connected to the lower side of the base of the acceleration sensor 20 in a pendulum manner. For example, the weight block has a cavity, and a portion of the base is accommodated in the cavity and kept a predetermined distance from the inner wall of the cavity. A through hole is provided on the side wall of the cavity of the weight block, and a protrusion is provided on the base. The protrusion of the base is positioned in the through hole of the weight block, so that the weight block is connected to the lower side of the base in a clamped manner. Of course, the connection between the base and the weight block is not limited to this, and for example, the weight block can be connected to the lower side of the base via a rope. It can be understood that, due to the action of gravity, the base that can be freely swung tends to remain in a plumb position, and in order to stabilize in the plumb position, the weight block is added to the lower side of the base. Therefore, no matter what angle the vehicle and the seat back of the vehicle are in, the weight block can drive the base connected thereto to swing along the front-rear direction of the vehicle to the plumb position, at which time the reference surface of the base is in a substantially horizontal position. When the back of the seat is inclined and rotated rearward, the posture controller 30 drives the base of the acceleration sensor 20 to rotate toward the rear side of the vehicle under the action of gravity. When the back of the seat is rotated forward, the posture controller 30 drives the base of the acceleration sensor 20 to rotate toward the front side of the vehicle under the action of gravity. Even in the case where the seat back is inclined in the front-rear direction, the posture controller 30 can still drive the base of the acceleration sensor 20 to swing in the front-rear direction of the vehicle until the base is in a substantially horizontal position, so that the support surface of the inertial ball as the reference surface is kept in a slightly horizontal state in the front-rear direction of the vehicle.

[0043] When the acceleration in the horizontal direction received by the vehicle is greater than a predetermined value, the inertial ball of the acceleration sensor 20 starts to displace from the neutral position as an inertial body; the first sensor lever of the moving member of the acceleration sensor 20 is linked with the displacement of the inertial ball in the front-rear direction of the vehicle and transmits the linkage to the pawl of the locking mechanism via the second sensor lever, so that the pawl abuts against the tooth portion on the ratchet wheel, and the locking mechanism is operated toward the side of the extraction operation of the safety belt to lock the rotation of the mandrel 10 in the extraction direction of the safety belt.

[0044] The clutch device 40 is connected with the mandrel 10 and activates the locking of the acceleration sensor 20 to the mandrel 10 under a predetermined condition.

[0045] Specifically, in combination with Fig. 5, the clutch device 40 has a first engaging portion 401 and a second engaging portion 402. The first engaging portion 401 is connected to the spindle 10 in a torsion-proof manner, for example, the first engaging portion 401 is in interference fit with the end portion of the spindle 10 to rotate together with the spindle 10. And when the spindle 10 rotates in the direction of the extraction of the safety belt under the predetermined condition, the first engaging portion 401 rotates together with the spindle 10, thereby driving the second engaging portion 402 to move to switch the acceleration sensor 20 from the non-engaged state to the engaged state. Specifically, for the clutch device 40 shown in Fig. 5, when the spindle 10 rotates counterclockwise A under the predetermined condition, the first engaging portion 401 of the clutch device 40 rotates counterclockwise together with the spindle 10, thereby driving the second engaging portion 402 to rotate counterclockwise from the position away from the acceleration sensor 20 to the position shown in Fig. 5, that is, the second engaging portion 402 switches the acceleration sensor 20 from the non-engaged state to the engaged state, which is shown in Fig. 5.

[0046] As a kind of engaging mode, as shown in Fig. 5, the second engaging portion 402 is configured as a leg portion with a bent end, correspondingly, the acceleration sensor 20 further comprises an opposite engaging portion 201, which can be configured as a sector member and has a tooth portion, and in the engaged state, the bent end of the leg portion engages with the tooth portion of the opposite engaging portion 201. When the bent end of the second engaging portion 402 of the clutch device 40 engages with the tooth portion of the opposite engaging portion 201, the second engaging portion 402 is hindered from further counterclockwise rotation due to the force that the bent end and the opposite engaging portion 201 abut against each other and thereby hinder the further counterclockwise rotation of the second engaging portion 402, therefore, the first engaging portion 401 and the spindle 10 are also hindered from further counterclockwise rotation, thereby the clutch device 40 locks the rotation of the spindle 10 in the direction of the extraction of the safety belt. Of course, the opposite engaging portion of the acceleration sensor is not limited to the above form, as long as the structure that can abut against each other with the second engaging portion to hinder the further rotation can be used, for example, a stepped portion. At the same time, in this case, the base of the acceleration sensor 20 is fixed and cannot be shaken due to the abutment of the opposite engaging portion 201 by the second engaging portion 402 of the clutch device 40, but the inertia ball can start to displace as an inertial body from the neutral position due to inertia to lock the rotation of the spindle 10 in the direction of the extraction of the safety belt.

[0047] In one example, the second engaging portion 402 is formed by a strip, and one end of the strip is bent to form a bent end, and the other end is bent to form a bent portion, and the bent end and the bent portion are spaced apart from each other by a distance to accommodate the distance between the spindle 10 and the acceleration sensor 20. Of course, the above-described manufacturing method of the second engaging portion is only an example, and other methods can also be used to manufacture the second engaging portion, such as splicing the second engaging portion via multiple segments. And, as shown in FIG. 5, in order to provide a connection between the first engaging portion 401 and the second engaging portion 402, a groove is provided on one end of the first engaging portion 401, and the bent portion of the second engaging portion 402 is connected to the groove of the first engaging portion 401 in a snap-fit manner. It should be noted that since the first engaging portion 401 and the second engaging portion 402 are connected in a snap-fit manner, if the force acting on the spindle 10 to rotate it counterclockwise is greater than the friction between the first engaging portion 401 and the second engaging portion 402, the first engaging portion 401 and the second engaging portion 402 will rotate relative to each other, and in this case, the bent end of the second engaging portion 402 is still engaged with the counter-engaging portion 201 and cannot be further rotated counterclockwise, while the spindle 10 and the first engaging portion 401 can be further rotated counterclockwise. In other words, in the clutch device 40 of the present application, the friction between the first engaging portion 401 and the second engaging portion 402 is much smaller than the force applied to the clutch device 40 when the seat belt is normally extracted, for example, the friction is set to be 10% of the force applied to the clutch device 40 when the seat belt is normally extracted, so the clutch device 40 does not affect the extraction of the seat belt in the normal use scenario.

[0048] The predetermined condition described above includes the acceleration of the vehicle exceeding a predetermined value, i.e., the situation where the vehicle is sharply decelerated due to a collision.

[0049] However, considering that during the rear adjustment of the backrest portion 3 of the seat, a longer amount of seat belt wearing is required due to the change in the relative position of the occupant and the seat, the seat belt retractor 100 needs to continuously perform the action of continuously weaving the seat belt. However, in the above process, the clutch device 40 and the acceleration sensor 20 will always be engaged, which will cause the acceleration sensor (especially the reference surface of the base) to be unable to adjust to a substantially horizontal position as the angle of the seat backrest portion 3 changes. Therefore, when the adjustment angle of the backrest portion 3 is too large, the inertia ball of the acceleration sensor will lock the spindle of the seat belt, and the seat belt will not be able to continue to be extracted. At this time, the occupant does not get a longer amount of seat belt wearing and feels uncomfortable because the seat belt is too tight.

[0050] To solve the above problem, the seat belt retractor 100 of the seat belt device 1 of the present application further comprises an unlocking device for unlocking the spindle 10 from the clutch device 40 when the spindle 10 is rotated in the extraction direction of the seat belt without satisfying the above-described predetermined condition.

[0051] Optionally, the unlocking device can be configured as an electromagnetic valve assembly 50, and the second engaging portion 402 of the clutching device 40 is moved towards the direction away from the acceleration sensor 20 under the action of the magnetic force exerted by the electromagnetic valve assembly 50.

[0052] As shown in FIG. 2, the electromagnetic valve assembly 50 can directly exert a magnetic force on the second engaging portion 402. The electromagnetic valve assembly 50 can include a housing, a coil and a magnetic core, the housing of the electromagnetic valve assembly 50 is also fixed on the end cover, and the housing is located on both sides of the second engaging portion 402 respectively with the acceleration sensor 20 and the attitude controller 30, when the predetermined condition is not met and the safety belt is pulled out, the coil is energized, and the magnetic core attracts the second engaging portion 402 so that the second engaging portion 402 is attached at the magnetic core, thereby making the second engaging portion 402 away from the acceleration sensor 20, in particular, the relative engaging portion 201, so as to unlock the clutching device and the acceleration sensor. Through this arrangement, the unlocking of the clutching device and the acceleration sensor is achieved in a simple and economical manner.

[0053] Optionally, as another embodiment, as shown in FIG. 3 and FIG. 4, the electromagnetic valve assembly 50 also includes a housing 524, which is fixed on the end cover, in addition, the electromagnetic valve assembly 50 further includes an electromagnetic actuator 525 (i.e. a magnetic core), a reset member 521 and a linkage member 522.

[0054] In one example, the reset member 521 is a coil spring, one end of which is fixed at the protrusion of the housing 524 through an annular portion, and the other end is fixed to the end of the linkage member 522 through another annular portion.

[0055] In one example, the linkage 522 is configured to be supported at the housing 524 in the form of a lever, that is, in Figure 4, the left end, that is, the first end of the linkage 522 is rotatably connected to the housing 524. And, the left end of the linkage 522 is connected with the reset member 521, and the other end is connected with the second matching part 402. When only the reset member 521 applies force to the linkage 522, the left end of the linkage 522 is pulled to a lower position by the reset member 521, at this time, the right end of the linkage 522 is at a higher position; when the electromagnetic actuator 525 applies force to the linkage 522, because the position where the electromagnetic actuator 525 applies force and the position where the reset member 521 applies force are located on both sides of the support position of the linkage 522 supported by the housing 524, and the force applied by the electromagnetic actuator 525 is greater, therefore, the right end of the linkage 522 descends while the left end rises. And, because the second matching part 402 is connected with the end of the linkage 522, therefore, the rising and falling of the right end of the linkage 522 in Figure 4 will be converted into the left and right displacement of the second matching part 402 in Figure 3. Specifically, the descent of the right end of the linkage 522 in Figure 4 causes the left displacement of the second matching part 402 in Figure 3; and, the rise of the right end of the linkage 522 in Figure 4 causes the right displacement of the second matching part 402 in Figure 3. In one example, the linkage 522 has a hook part 523 at the end where the second matching part 402 is located, and the second matching part 402 is positioned in the hook part 523. As shown in the figure, the recess space of the hook part 523 is obviously larger than the transverse dimension of the second matching part, it can be understood that this arrangement is to cause the linkage of the second matching part 402 while not interfering with the normal operation of the second matching part 402. Therefore, by setting the hook, the second matching part 402 is linked with the linkage 522.

[0056] Under the action of the magnetic force applied by the electromagnetic actuator 525, the linkage 522 moves from the first position to the second position against the elastic force applied by the reset member 521, that is, is attracted and abuts on the electromagnetic actuator 525, in the orientation shown in Figure 3, the second position is closer to the left than the first position, that is, farther away from the acceleration sensor 20, so that the linkage 522 moves the second matching part 402 away from the acceleration sensor 20. Conversely, under the sole action of the reset member 521, the first end of the linkage 522 is close to the reset member 521 by the elastic force of the reset member 521, and the hook part 523 moves towards the direction close to the acceleration sensor 20, so that the second matching part 402 can enter the engaged state from the disengaged state with the acceleration sensor 20. By setting the linkage, the magnetic attraction efficiency is improved, so that the same attractive force can be achieved with less current, saving energy.

[0057] Therefore, in the safety belt device of the present application, by setting the unlocking device, the inertia ball of the acceleration sensor is prevented from locking the core shaft of the safety belt during the adjustment of the seat in a large adjustment angle range and in various adjustment postures, ensuring that the webbing can continue to be drawn out, so that the passenger can obtain sufficient webbing wearing amount, thereby providing a comfortable experience for the passenger.

[0058] As described above, although the exemplary embodiments of the present application have been described with reference to the accompanying drawings in the description, the present application is not limited to the above-described specific embodiments, and the scope of protection of the present application should be defined by the claims and their equivalent meanings.

Claims

1. A safety belt device (1) comprising: a safety belt retractor (100) mounted on a backrest portion (3) of a seat and including a spool (10) on which a safety belt is wound; an acceleration sensor (20) for detecting acceleration of a vehicle in a front-rear direction and, based on the detected acceleration, locking rotation of the spool (10) in a direction of extraction of the safety belt; a posture controller (30) for maintaining a reference plane of the acceleration sensor (20) horizontal; and a clutch device (40) connected to the spool (10) and activating, under predetermined conditions, locking of the spool (10) by the acceleration sensor (20); characterized in that it further comprises an unlocking device for, when the predetermined conditions are not met, unlocking the spool (10) by the clutch device (40) when the spool (10) is rotated in the direction of extraction of the safety belt.

2. The safety belt arrangement (1) according to claim 1, wherein the clutch device (40) has a first engaging portion (401) torsionally connected to the spool (10) and a second engaging portion (402), the first engaging portion (401) rotating with the spool (10) when the spool (10) is rotated in the direction of extraction of the safety belt under the predetermined conditions, thereby driving the second engaging portion (402) to move to switch the acceleration sensor (20) from a non-engaged state to an engaged state, thereby locking rotation of the spool (10) in the direction of extraction of the safety belt; and the unlocking device applies a force to the second engaging portion (402) to move it away from the acceleration sensor (20).

3. The safety belt arrangement (1) as claimed in claim 2, wherein the unlocking device is configured as a solenoid assembly (50), and the second engaging portion (402) moves toward a direction away from the acceleration sensor (20) under the action of a magnetic force applied by the solenoid assembly (50).

4. The safety belt arrangement (1) as claimed in claim 3, wherein the solenoid assembly (50) directly applies a magnetic force to the second engaging portion (402).

5. The safety belt arrangement (1) as claimed in claim 3, wherein the solenoid assembly (50) includes a solenoid actuator (525), a return member (521), and a linkage member (522), the linkage member (522) moves from a first position to a second position against a return force applied by the return member (521) under the action of a magnetic force applied by the solenoid actuator (525), and the second engaging portion (402) moves toward a direction away from the acceleration sensor (20) in linkage with the linkage member (522).

6. The safety belt arrangement (1) as claimed in claim 5, wherein the linkage member (522) has a hook portion (523) at one end, and the second engaging portion (402) is positioned in the hook portion (523).

7. The safety belt arrangement (1) as claimed in claim 6, wherein the solenoid assembly (50) further includes a housing (524), a first end of the linkage member (522) is rotatably fixed to the housing (524), and the return member (521) is configured as a spring, one end of which is fixed to the housing (524) and the other end of which is fixed to the first end of the linkage member (522).

8. The safety belt arrangement (1) as claimed in claim 1, wherein The clutch device (40) and the unlocking device are fixed to an end cover, and the mandrel (10) is rotatably supported on the end cover.

9. The safety belt arrangement (1) as claimed in claim 1, wherein The acceleration sensor (20) includes a mounting bracket, an inertial ball, and a base including a support surface for holding the inertial ball, the base including a rocking shaft extending in a left-right direction of the vehicle and being held on the mounting bracket in a turnable manner in the front-rear direction via the rocking shaft; The attitude controller (30) is connected to a lower side of the base and is freely swingable to drive the base of the acceleration sensor (20) to rock in the front-rear direction via the rocking shaft.

10. The safety belt arrangement (1) as claimed in claim 9, wherein The first fitting portion (402) of the clutch device (40) is interference-fitted with an end portion of the mandrel (10); and / or, The second fitting portion (402) of the clutch device (40) is configured as a leg portion having a bent end, the acceleration sensor (20) further includes an opposite fitting portion (201), and in the engaged state, the bent end of the leg portion is fitted with a tooth portion of the opposite fitting portion (201).

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