Safety belt delivery device and vehicle

Abstract

The invention provides a safety belt delivery device and a vehicle, and belongs to the technical field of vehicle parts, and the safety belt delivery device comprises a shell, the delivery arm is slidably arranged in the cavity; the driving mechanism comprises a movable displacement execution element; the displacement executing element is connected with the displacement input end of the connecting rod mechanism, the displacement output end of the connecting rod mechanism is connected with the delivery arm, and the connecting rod mechanism is arranged to be capable of amplifying displacement of the displacement executing element and transmitting the displacement to the delivery arm. The stroke between the retraction position and the extension position is larger than the stroke between the first position and the second position. The mechanism has the beneficial effects that the connecting rod mechanism can play a role in stroke amplification, so that the displacement execution element can drive the delivery arm to complete long-stroke movement only by moving a relatively short stroke; the time required for the displacement execution element to complete the short stroke is extremely short, so that the stretching speed of the safety belt delivery device can be greatly increased, and the stretching time consumption is shortened.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts technology, and relates to a seat belt delivery device and a vehicle. Background Technology

[0002] Seatbelt deliverers, as auxiliary devices that improve the ease of seatbelt access, are widely used in mid-to-high-end vehicles. The core function of a seatbelt deliverer is to use a drive mechanism to extend and retract the delivery arm, actively delivering the seatbelt latch or webbing to a position easily accessible to the occupant. This reduces the difficulty of fastening the seatbelt, increases seatbelt usage, and ultimately ensures driving safety.

[0003] Currently, most seatbelt delivery devices in existing technologies adopt a structure in which the delivery arm is directly driven by a drive unit. This direct-drive structure design has obvious technical defects, which restrict the user experience and delivery efficiency of seatbelt delivery devices: on the one hand, in order to meet the delivery stroke requirements of the seatbelt latch, the delivery arm needs to have a sufficient extension range to ensure that the latch can be delivered to a predetermined position that is easy for the occupant to grasp; on the other hand, the output speed and torque characteristics of the drive unit are relatively fixed, which cannot achieve rapid movement of the delivery arm, resulting in the delivery arm typically taking at least 2 seconds to extend from the initial position to the predetermined position.

[0004] In real-world driving scenarios, occupants often want to quickly access their seatbelts after sitting down. Excessive waiting time not only reduces convenience but may also cause occupants to become impatient and abandon the seatbelt delivery function, contradicting the device's original design intent of increasing seatbelt usage. Furthermore, the delivery arm's retraction process also suffers from slow response; excessive retraction time can lead to interference between the delivery arm and the occupant's limbs, negatively impacting the driving experience. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the prior art by providing a seatbelt delivery device and a vehicle.

[0006] The objective of this invention can be achieved through the following technical solution: a seatbelt delivery device, comprising: A housing having an internal cavity; A delivery arm, which is slidably disposed in the cavity, has a travel position including a retracted position and an extended position; A drive mechanism, the drive mechanism including a movable displacement actuator, the stroke position of the displacement actuator including a first position and a second position; A linkage mechanism is provided, wherein the displacement actuator is connected to the displacement input end of the linkage mechanism, the displacement output end of the linkage mechanism is connected to the delivery arm, the displacement actuator is linked to the delivery arm through the linkage mechanism, and the linkage mechanism is configured to amplify the displacement of the displacement actuator and transmit it to the delivery arm; When the displacement actuator is in the first position, the delivery arm is in the retracted position; when the displacement actuator is in the second position, the delivery arm is in the extended position; wherein the travel distance between the retracted position and the extended position is greater than the travel distance between the first position and the second position.

[0007] Preferably, the housing is provided with a guide groove, the shape of which is consistent with the movement trajectory of the delivery arm and is arc-shaped, and the delivery arm is provided with a sliding shaft that can slide through the guide groove.

[0008] Preferably, the linkage mechanism includes a connecting plate constituting the displacement output end, the connecting plate being provided with a drive groove, the sliding shaft being connected to the drive groove, the sliding shaft being allowed to slide in the length direction of the drive groove, and the sliding shaft being locked in the width direction of the drive groove; wherein, when the linkage mechanism moves, the connecting plate drives the sliding shaft to slide along the guide groove, and the sliding shaft also slides in the length direction of the drive groove to eliminate motion interference with the connecting plate.

[0009] Preferably, the shape of the cavity is adapted to the shape of the delivery arm, and the guide groove, the delivery arm, and the cavity are all arc-shaped with the same curvature.

[0010] Preferably, the linkage mechanism is configured as a scissor type structure, one end of the linkage mechanism is hinged to the housing, the connecting plate is located at the other end of the linkage mechanism, the cross node of the linkage mechanism constitutes the displacement input end, and the displacement actuator is hinged to the cross node of the linkage mechanism.

[0011] Preferably, the linkage mechanism includes a hinged linkage group, a cross linkage group, and an output linkage group. One end of the hinged linkage group is hinged to the housing, one end of the cross linkage group is hinged to the other end of the hinged linkage group, one end of the output linkage group is hinged to the other end of the cross linkage group, the other end of the output linkage group is hinged to the connecting plate, and the displacement actuator is hinged to the cross node of the cross linkage group.

[0012] Preferably, the hinged linkage group includes two first links, one end of which is hinged to the same position of the housing to form a V-shaped structure; the cross linkage group includes two second links, which are hinged to each other to form an X-shaped structure; one end of each of the two second links is hinged to the other end of each of the two first links; and the output linkage group includes two third links, one end of which is hinged to the other end of each of the two second links; and the other end of each of the two third links is hinged to the connecting plate.

[0013] Preferably, the drive mechanism further includes a linear drive element, one end of which is connected to the linear drive element and the other end is hinged to the cross node of the linkage mechanism.

[0014] Preferably, the linear drive element is an electro-hydraulic actuator / pump-controlled electro-hydraulic actuator / electric cylinder.

[0015] A vehicle includes: a seatbelt delivery device as described above, and an electronic control unit, the seatbelt delivery device being mounted on a seat or a B-pillar, the electronic control unit being electrically connected to a drive mechanism of the seatbelt delivery device.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The linkage mechanism can amplify the stroke, so the displacement actuator only needs to move a relatively short stroke to drive the delivery arm to complete a longer stroke. The time required for the displacement actuator to complete this short stroke is extremely short, which can greatly improve the extension and retraction speed of the seat belt delivery device and shorten its extension and retraction time.

[0017] 2. The guide chute can provide guidance and limit for the movement of the delivery arm. The shape of the guide chute is completely consistent with the movement trajectory of the delivery arm, which ensures that the delivery arm can move smoothly along the preset arc trajectory and avoid deviation in the movement direction.

[0018] 3. The shape of a scissor linkage is similar to a figure eight or a cross diamond. The core principle of the scissor structure is to utilize the geometric amplification effect of the cross links. When the displacement actuator moves the cross nodes by a small amount, it changes the included angle of the links. This change in included angle will cause the connecting plate to produce a larger displacement through the lever principle. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the seatbelt delivery device of the present invention in the retracted state.

[0020] Figure 2 This is a schematic diagram of the seatbelt delivery device of the present invention in the extended state.

[0021] Figure 3This is a schematic diagram of the delivery arm of the present invention moving to the extended position.

[0022] Figure 4 This is a schematic diagram of the delivery arm of the present invention moving to the retracted position.

[0023] Figure 5 This is a schematic diagram of the displacement actuator of the drive mechanism of the present invention when it is in the first position.

[0024] Figure 6 This is a schematic diagram of the displacement actuator of the drive mechanism of the present invention when it is in the second position.

[0025] Figure 7 This is an exploded view of the structure of the seatbelt delivery device of the present invention.

[0026] In the figure, 100 is the housing; 110 is the guide slide; 200 is the delivery arm; 210 is the sliding shaft; 300 is the displacement actuator; 400 is the linkage mechanism; 410 is the connecting plate; 411 is the drive slide; 420 is the articulated linkage group; 421 is the first link; 430 is the cross linkage group; 431 is the second link; 432 is the cross node; 440 is the output linkage group; 441 is the third link; and 500 is the linear drive element. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0028] like Figures 1 to 7 As shown, a seatbelt delivery device includes: The housing 100 has a cavity formed inside it; Delivery arm 200 is slidably disposed in the cavity, and the travel positions of delivery arm 200 include a retracted position and an extended position; The drive mechanism includes a movable displacement actuator 300, and the travel positions of the displacement actuator 300 include a first position and a second position. The linkage mechanism 400 is connected to the displacement input end of the linkage mechanism 400, and the displacement output end of the linkage mechanism 400 is connected to the delivery arm 200. The displacement actuator 300 is linked to the delivery arm 200 through the linkage mechanism 400. The linkage mechanism 400 is configured to amplify the displacement of the displacement actuator 300 and transmit it to the delivery arm 200. When the displacement actuator 300 is in the first position, the delivery arm 200 is in the retracted position, and when the displacement actuator 300 is in the second position, the delivery arm 200 is in the extended position; wherein, the travel between the retracted position and the extended position is greater than the travel between the first position and the second position.

[0029] The housing 100 forms a closed cavity, providing space for the extension and retraction of the delivery arm 200. The delivery arm 200 is directly connected to the seatbelt latch (or webbing) and is responsible for delivering the seatbelt to the occupant. The delivery arm 200 can only extend and retract along a preset trajectory; its movement is restricted by the cavity, preventing deviation or wobbling. The retracted position refers to the position where the delivery arm 200 is completely retracted within the cavity of the housing 100. At this position, the seatbelt latch is in its normally concealed position, not occupying passenger space and not interfering with the occupant's seating or standing. The extended position refers to the position where the delivery arm 200 extends a certain distance out of the cavity. At this position, the seatbelt latch is delivered to a predetermined position most convenient for the occupant to grasp, completing the delivery action.

[0030] The drive mechanism is the power source for the telescopic movement of the delivery arm 200. Its core component is the movable displacement actuator 300, which is a component capable of linear movement under power drive. The first position refers to the initial retracted position of the displacement actuator 300, corresponding to the retracted position of the delivery arm 200; the second position refers to the fully extended position of the displacement actuator 300, corresponding to the extended position of the delivery arm 200. The core function of the linkage mechanism 400 is to amplify the small displacement of the displacement actuator 300 and then transmit it to the delivery arm 200, realizing the function of displacement amplification and transmission. The displacement input end of the linkage mechanism 400 is connected to the displacement actuator 300, and the displacement output end of the linkage mechanism 400 is connected to the delivery arm 200. This means that when the displacement actuator 300 moves, it can drive the connecting mechanism to move, and when the linkage mechanism 400 moves, it will drive the delivery arm 200 to telescopically move through the displacement output end.

[0031] The extension process of the seatbelt delivery device is as follows: In the initial state, the displacement actuator 300 is in the first position, the delivery arm 200 is in the retracted position, and the seatbelt latch is hidden. Then, the drive mechanism drives the displacement actuator 300 to move from the first position to the second position (in the extension direction). The displacement actuator 300 simultaneously drives the linkage mechanism 400 to move. The linkage mechanism 400 amplifies the small displacement of the displacement actuator 300 through its own stroke amplification structure and transmits it to the delivery arm 200 through the displacement output end. When the displacement actuator 300 moves to the second position, the delivery arm 200, driven by the linkage mechanism 400, moves to the extended position, delivering the seatbelt latch to a position easily grasped by the occupant, completing the delivery action.

[0032] The retraction and reset process of the seatbelt delivery device is as follows: the drive mechanism moves the displacement actuator 300 from the second position to the first position (in the retraction direction), simultaneously driving the linkage mechanism 400 to move in the opposite direction. The linkage mechanism 400 amplifies the small reverse displacement of the displacement actuator 300 and drives the delivery arm 200 to retract in the opposite direction. When the displacement actuator 300 returns to the first position, the delivery arm 200 also returns to the retracted position simultaneously, hidden inside the housing 100, to avoid interfering with the occupants or other parts of the vehicle.

[0033] During the aforementioned extension and retraction process, the displacement actuator 300 does not need to move an excessive distance; only a small displacement movement is required to drive the delivery arm 200 to complete a sufficient extension stroke via the linkage mechanism 400. Compared to the existing technology where extension and retraction takes at least 2 seconds, this solution can reduce the extension and retraction time of the delivery arm 200 to within 1 second, reducing passenger waiting time and improving convenience. Although the stroke of the displacement actuator 300 (the distance between the first and second positions) is small, it is amplified by the linkage mechanism 400, so the stroke of the delivery arm 200 (the distance between the retracted and extended positions) fully meets the design requirements.

[0034] The linkage mechanism 400 can amplify the stroke, so the displacement actuator 300 only needs to move a relatively short stroke to drive the delivery arm 200 to complete a longer stroke. The time required for the displacement actuator 300 to complete this short stroke is extremely short, which can greatly improve the extension and retraction speed of the seat belt delivery device and shorten its extension and retraction time.

[0035] It should be noted that, in one embodiment, the delivery arm 200 moves 175mm from the retracted position to the extended position (the actual stroke is longer), while the displacement actuator 300 moves only 92mm from the first position to the second position. This significantly shortens the stroke of the displacement actuator 300, reducing the process time to less than 1 second. In contrast, in the prior art, the extension stroke of the drive component is the same as that of the delivery arm 200, i.e., the stroke of the drive component is 175mm, which would take at least 2 seconds.

[0036] like Figures 1 to 4 , Figure 7 As shown, based on the above embodiment, the housing 100 is provided with a guide groove 110. The shape of the guide groove 110 is consistent with the movement trajectory of the delivery arm 200 and both are arc-shaped. The delivery arm 200 is provided with a sliding shaft 210, which can slide through the guide groove 110.

[0037] The guide groove 110 provides guidance and limits for the movement of the delivery arm 200. The shape of the guide groove 110 is completely consistent with the movement trajectory of the delivery arm 200, which ensures that the delivery arm 200 can move smoothly along the preset arc trajectory and avoid deviation in the movement direction. When the delivery arm 200 extends or retracts, the slide shaft 210 slides synchronously along the arc trajectory of the guide groove 110. By limiting the range and direction of movement of the slide shaft 210, the guide groove 110 further constrains the movement trajectory of the delivery arm 200, ensuring that the delivery arm 200 always extends and retracts smoothly along the arc trajectory without deviation, shaking or jamming, thus ensuring the stability and smoothness of the movement of the delivery arm 200, and thereby ensuring that the seat belt latch can be accurately delivered to the predetermined position.

[0038] Based on the above embodiments, the linkage mechanism 400 includes a connecting plate 410 constituting a displacement output end. The connecting plate 410 is provided with a drive slide groove 411. The slide shaft 210 is connected to the drive slide groove 411. The slide shaft 210 is allowed to slide in the length direction of the drive slide groove 411, and the slide shaft 210 is locked in the width direction of the drive slide groove 411. When the linkage mechanism 400 moves, the connecting plate 410 drives the slide shaft 210 to slide along the guide slide groove 110, and the slide shaft 210 also slides in the length direction of the drive slide groove 411 to eliminate motion interference with the connecting plate 410.

[0039] The connecting plate 410 at the displacement output end moves together. Since the sliding shaft 210 is connected to the drive groove 411 of the connecting plate 410, and the sliding shaft 210 simultaneously passes through the guide groove 110 on the housing 100, the movement of the connecting plate 410 will drive the sliding shaft 210 to slide along the arc-shaped trajectory of the guide groove 110, thereby driving the delivery arm 200 to complete the telescopic movement. At the same time, during the movement of the sliding shaft 210 driven by the connecting plate 410, the sliding shaft 210 will also slide synchronously in the length direction of the drive groove 411. The core function of this sliding action is to eliminate the motion interference between the sliding shaft 210 and the connecting plate 410, because there is a difference between the motion trajectory of the connecting plate 410 and the arc-shaped motion trajectory of the sliding shaft 210 along the guide groove 110. By sliding the sliding shaft 210 in the length direction within the drive groove 411, the motion interference between the two can be eliminated.

[0040] It should be further explained that the displacement actuator 300 performs linear motion, while the delivery arm 200 moves in an arc, resulting in their motion trajectories being inconsistent. When the delivery arm 200 moves, its sliding shaft 210 moves along the guide groove 110 on the housing 100 in an arc trajectory; while when the linkage mechanism 400 moves, the connecting plate 410, which serves as its displacement output end, moves in a basically linear trajectory. Since the sliding shaft 210 passes through both the guide groove 110 on the housing 100 and the drive groove 411 on the connecting plate 410, in order to eliminate the motion interference between the sliding shaft 210 and the connecting plate 410 caused by the inconsistent motion trajectories, the sliding shaft 210 needs to be configured to slide within the drive groove 411. This allows the sliding shaft 210 to slide to a position on the drive groove 411 aligned with the guide groove 110 according to changes in its position, thereby eliminating the motion interference between the two.

[0041] Based on the above embodiments, the shape of the cavity is adapted to the shape of the delivery arm 200, and the guide groove 110, the delivery arm 200 and the cavity are all arc-shaped with the same curvature.

[0042] like Figures 1 to 4 , Figure 7 As shown, based on the above embodiment, the linkage mechanism 400 is configured as a scissor structure, one end of the linkage mechanism 400 is hinged to the housing 100, the connecting plate 410 is located at the other end of the linkage mechanism 400, the cross node 432 of the linkage mechanism 400 constitutes the displacement input end, and the displacement actuator 300 is hinged to the cross node 432 of the linkage mechanism 400.

[0043] The scissor-type structure consists of multiple sets of cross-hinged links, enabling telescopic and amplified motion to meet displacement amplification requirements. The cross node 432 of the scissor-type linkage mechanism 400 constitutes the displacement input end of the mechanism, and the displacement actuator 300 is hinged to the cross node 432 of the linkage mechanism 400. The scissor-type linkage mechanism 400 has a shape resembling a figure-eight or a cross-diamond. The core principle of the scissor-type structure utilizes the geometric amplification effect of the cross links. When the displacement actuator 300 moves the cross node 432 by a small amplitude, it changes the included angle of the links. This change in angle, through the lever principle, causes the connecting plate 410 to produce a larger displacement. In other words, this structure, through the geometric amplification effect, enables the connecting plate 410 to produce a larger linear telescopic displacement, achieving stroke amplification. Furthermore, this structure features smooth motion, controllable stroke amplification ratio, and a compact structure.

[0044] When the displacement actuator 300 extends linearly from the first position to the second position, it pushes the cross node 432 of the linkage mechanism 400 to move, causing the scissor linkage mechanism 400 to unfold. The other end of the linkage mechanism 400 (connecting plate 410) moves accordingly, driving the delivery arm 200 to extend along the guide slide 110 through the drive slide 411 and slide shaft 210. When the displacement actuator 300 retracts, it pulls the cross node 432 to move in the opposite direction, causing the scissor linkage mechanism 400 to retract. The connecting plate 410 moves in the opposite direction synchronously, causing the delivery arm 200 to retract. The entire process achieves smooth displacement amplification and transmission without motion interference.

[0045] Based on the above embodiments, the linkage mechanism 400 includes a hinged linkage group 420, a cross linkage group 430, and an output linkage group 440. One end of the hinged linkage group 420 is hinged to the housing 100, one end of the cross linkage group 430 is hinged to the other end of the hinged linkage group 420, one end of the output linkage group 440 is hinged to the other end of the cross linkage group 430, the other end of the output linkage group 440 is hinged to the connecting plate 410, and the displacement actuator 300 is hinged to the cross node 432 of the cross linkage group 430.

[0046] Specifically, the hinged linkage group 420 includes two first linkages 421, one end of which is hinged to the same position of the housing 100 to form a V-shaped structure. The cross linkage group 430 includes two second linkages 431, which are hinged to each other to form an X-shaped structure. One end of each second linkage 431 is hinged to the other end of each first linkage 421. The output linkage group 440 includes two third linkages 441, one end of which is hinged to the other end of each second linkage 431. The other end of each third linkage 441 is hinged to the connecting plate 410.

[0047] like Figure 1 , Figure 2 , Figures 5 to 7 As shown, based on the above embodiment, the drive mechanism further includes a linear drive element 500, one end of the displacement actuator 300 is connected to the linear drive element 500 and the other end is hinged to the cross node 432 of the linkage mechanism 400.

[0048] The linear drive element 500 is the core component of the drive mechanism that outputs linear power. It is responsible for providing the driving force for the linear motion of the displacement actuator 300. The displacement actuator 300 can perform reciprocating linear motion under the drive of the linear drive element 500, and ensure that its linear motion can be smoothly transmitted to the cross node 432 of the linkage mechanism 400.

[0049] Preferably, the linear drive element 500 is an electro-hydraulic actuator / pump-controlled electro-hydraulic actuator / electric cylinder.

[0050] like Figures 1 to 7 As shown, based on the above embodiments, a vehicle includes: such as a seat belt delivery device, and also includes an electronic control unit. The seat belt delivery device is mounted on the seat or B-pillar, and the electronic control unit is electrically connected to the drive mechanism of the seat belt delivery device.

[0051] The electronic control unit (ECU), as the control core of the seatbelt delivery device, is electrically connected to the linear drive element 500 in the drive mechanism. It sends control commands to the drive mechanism to control the movement of the displacement actuator 300 between a first position and a second position. The ECU can automatically trigger the delivery action based on preset logic or external signals, including but not limited to: door opening or closing signals, seat sensor signals, ignition switch signals, central control system commands, or autonomous driving system status signals. For example, when it detects that an occupant has sat in the seat and the door is closed, the ECU determines that seatbelt delivery is required and outputs an electrical signal to drive the linear drive element 500, causing the displacement actuator 300 to move from the first position to the second position. Through the linkage mechanism 400, the delivery arm 200 moves from the retracted position to the extended position, delivering the seatbelt latch to the predetermined position. When use is complete or the retraction condition is met, the ECU controls the drive mechanism to reverse, causing the delivery arm 200 to return to the retracted position and be hidden inside the housing 100.

[0052] The seat belt delivery device is installed on the side of the seat or the B-pillar. Regardless of the installation position, the guide groove 110 on the housing 100 cooperates with the sliding shaft 210 on the delivery arm 200, and the drive groove 411 on the connecting plate 410 slides with the sliding shaft 210. This effectively constrains the movement trajectory and eliminates the movement interference caused by the difference between linear drive and arc movement, ensuring a smooth and reliable delivery process.

[0053] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0054] Furthermore, in this invention, descriptions involving "first," "second," "a," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0055] In this invention, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "fixed" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction between two elements, unless otherwise explicitly limited.

[0056] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A seatbelt delivery device, characterized in that, include: A housing (100) having a cavity formed inside; A delivery arm (200) is slidably disposed in the cavity, and the travel positions of the delivery arm (200) include a retracted position and an extended position; A drive mechanism, the drive mechanism including a movable displacement actuator (300), the travel position of the displacement actuator (300) including a first position and a second position; A linkage mechanism (400) is provided, wherein the displacement actuator (300) is connected to the displacement input end of the linkage mechanism (400), the displacement output end of the linkage mechanism (400) is connected to the delivery arm (200), the displacement actuator (300) is linked to the delivery arm (200) through the linkage mechanism (400), and the linkage mechanism (400) is configured to amplify the displacement of the displacement actuator (300) and transmit it to the delivery arm (200); When the displacement actuator (300) is in the first position, the delivery arm (200) is in the retracted position, and when the displacement actuator (300) is in the second position, the delivery arm (200) is in the extended position; wherein the travel distance between the retracted position and the extended position is greater than the travel distance between the first position and the second position.

2. A seatbelt delivery device as described in claim 1, characterized in that: The housing (100) is provided with a guide groove (110), the shape of which is consistent with the movement trajectory of the delivery arm (200) and is arc-shaped. The delivery arm (200) is provided with a sliding shaft (210), which slides through the guide groove (110).

3. A seatbelt delivery device as described in claim 2, characterized in that: The linkage mechanism (400) includes a connecting plate (410) constituting the displacement output end. The connecting plate (410) is provided with a drive groove (411). The sliding shaft (210) is connected to the drive groove (411). The sliding shaft (210) is allowed to slide in the length direction of the drive groove (411), and the sliding shaft (210) is locked in the width direction of the drive groove (411). When the linkage mechanism (400) moves, the connecting plate (410) drives the sliding shaft (210) to slide along the guide groove (110), and the sliding shaft (210) also slides in the length direction of the drive groove (411) to eliminate motion interference with the connecting plate (410).

4. A seatbelt delivery device as described in claim 3, characterized in that: The shape of the cavity is adapted to the shape of the delivery arm (200), and the guide groove (110), the delivery arm (200) and the cavity are all arc-shaped with the same curvature.

5. A seatbelt delivery device as described in claim 3, characterized in that: The linkage mechanism (400) is configured as a scissor structure. One end of the linkage mechanism (400) is hinged to the housing (100). The connecting plate (410) is located at the other end of the linkage mechanism (400). The cross node (432) of the linkage mechanism (400) constitutes the displacement input end. The displacement actuator (300) is hinged to the cross node (432) of the linkage mechanism (400).

6. A seatbelt delivery device as described in claim 5, characterized in that: The linkage mechanism (400) includes a hinged linkage group (420), a cross linkage group (430), and an output linkage group (440). One end of the hinged linkage group (420) is hinged to the housing (100), one end of the cross linkage group (430) is hinged to the other end of the hinged linkage group (420), one end of the output linkage group (440) is hinged to the other end of the cross linkage group (430), and the other end of the output linkage group (440) is hinged to the connecting plate (410). The displacement actuator (300) is hinged to the cross node (432) of the cross linkage group (430).

7. A seatbelt delivery device as described in claim 6, characterized in that: The hinged linkage group (420) includes two first linkages (421), one end of which is hinged to the housing (100) at the same position to form a V-shaped structure. The cross linkage group (430) includes two second linkages (431), which are hinged to each other to form an X-shaped structure. One end of each second linkage (431) is hinged to the other end of each first linkage (421). The output linkage group (440) includes two third linkages (441), one end of which is hinged to the other end of each second linkage (431). The other end of each third linkage (441) is hinged to the connecting plate (410).

8. A seatbelt delivery device as described in claim 5, characterized in that: The drive mechanism further includes a linear drive element (500), one end of which is connected to the linear drive element (500) and the other end is hinged to the cross node (432) of the linkage mechanism (400).

9. A seatbelt delivery device as described in claim 8, characterized in that: The linear drive element (500) is an electro-hydraulic actuator / pump-controlled electro-hydraulic actuator / electric cylinder.

10. A vehicle, characterized in that, include: The seatbelt delivery device as claimed in any one of claims 1 to 9 further includes an electronic control unit, the seatbelt delivery device being mounted on the seat or B-pillar, and the electronic control unit being electrically connected to the drive mechanism of the seatbelt delivery device.

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