SAFETY BELT TRACTOR DEVICE AND TRANSPORT DEVICE

Abstract

A seat belt retractor device (100) and a transport device (200). The seat belt retractor device (100) comprises a locking unit (1), a control unit (2), and a movable rod (21). The locking unit (1) comprises a pawl (12) and a locking wheel (13). The pawl (12) can move into a locking position, thus locking the locking wheel (13). The control unit (2) is used to acquire vehicle sensor information. The movable rod (21) is configured to move into a first position when the vehicle sensor information meets a trigger condition and push the pawl (12) into the locking position, thus locking the locking wheel (13). The structure of the seatbelt retractor device is simplified, thus improving the passenger experience and ensuring the ease of use of seatbelts.

Description

REFERENCES TO RELATED REGISTRATIONS

[0001] This application is based on Chinese patent application No. 202321030225.2, filed on April 28, 2023, and claims priority over the aforementioned Chinese patent application, the entire contents of which are hereby incorporated by reference. TECHNICAL AREA

[0002] This application belongs to the technical field of safety devices; in particular, this application relates to a seat belt retractor device and a transport device. BACKGROUND

[0003] In everyday vehicle use, seat belts, as an important passive safety restraint component, hold occupants back in dangerous situations to protect them from injury or minimize the risk of injury. The release mechanism of a seat belt retractor plays a crucial role in this process. Such a release mechanism, which relies heavily on a vehicle sensor system, actively triggers a retractor locking mechanism upon detecting a dangerous situation, thus restraining the occupant.

[0004] In a conventional release mechanism, a steel ball structure is generally used. Specifically, a steel ball seat is internally provided with a conical surface feature, allowing a steel ball to roll in any direction along the conical surface. Additionally, a brake lever is synchronously positioned to be attached to the steel ball, enabling a vehicle sensor release structure to initiate the rolling of the steel ball based on vehicle acceleration and deceleration or vehicle body position. The rolling of the steel ball then triggers the retractor locking mechanism to restrain the occupant.

[0005] However, the steel ball structure not only increases the complexity of a vehicle design, but also poses the risk of accidental release of the seat belt locking mechanism and makes it more difficult for the occupant to pull out the seat belt, thus impairing the ease of use of the seat belt. SUMMARY

[0006] One objective of this application is to provide a new technical solution for a seat belt retractor device and a transport device.

[0007] According to a first aspect of this application, a seatbelt retractor device is provided, comprising: a locking unit, wherein the locking unit includes a pawl and a locking wheel, the pawl being able to move into a locking position so that the pawl can lock the locking wheel, and the locking wheel being configured to control the retraction of a seatbelt; a control unit being configured to acquire vehicle sensor information and to determine whether or not the vehicle sensor information satisfies a trigger condition; and a movable rod, wherein the movable rod being configured such that, when the vehicle sensor information satisfies the trigger condition, the movable rod moves into a first position and pushes the pawl into the locking position, thereby locking the locking wheel.

[0008] In some embodiments, the latch can move into an unlocked position, or the latch can be switched from the locked position to an unlocked position. If the vehicle sensor information does not meet the triggering condition, the movable rod moves to a second position and abuts the latch, thereby moving the latch into the unlocked position.

[0009] In some embodiments, the belt retractor further comprises a drive structure, wherein the drive structure is connected to the movable rod. If the vehicle sensor information does not meet the triggering condition, the drive structure drives the movable rod to move into the second position in order to engage with and strike the pawl; and / or When the vehicle sensor information meets the trigger condition, the drive structure propels the movable rod to move into the first position.

[0010] In some embodiments, the drive structure comprises an electromagnetic release element and an electromagnetic induction element, wherein the electromagnetic release element is electrically connected to the control unit and the electromagnetic induction element is arranged on the moving rod. When the vehicle sensor information meets the release condition, the electromagnetic release element and the electromagnetic induction element attract each other, and the electromagnetic induction element drives the moving rod to move into the first position and pushes the pawl into the locking position, and / or If the vehicle sensor information does not meet the triggering condition, the electromagnetic trigger element and the electromagnetic induction element repel each other, the electromagnetic induction element drives the movable rod to move into the second position, and the movable rod pushes against the latch to bring the latch into the unlocking position.

[0011] In some embodiments, the seat belt retractor device further comprises an elastic return element, the elastic return element being connected to the movable rod. If the vehicle sensor information does not meet the release condition, the elastic return element pushes the movable rod into the second position, causing the movable rod to strike the pawl and move the pawl into the unlocked position; and / or if the vehicle sensor information meets the release condition, the electromagnetic release element and the electromagnetic induction element attract each other, the movable rod moves into the first position and pushes the pawl into the locked position, and the elastic return element is in a compressed state.

[0012] In some embodiments, the drive structure comprises an electromagnetic release element and an electromagnetic induction element; the electromagnetic release element is electrically connected to the control unit, and the electromagnetic induction element is arranged on the movable rod.If the vehicle sensor information does not meet the triggering condition, the electromagnetic trigger element and the electromagnetic induction element attract each other, the movable rod moves to the second position, so that the movable rod abuts the latch to bring the latch into the unlocked position; and / or if the vehicle sensor information meets the triggering condition, the electromagnetic trigger element and the electromagnetic induction element repel each other, the electromagnetic induction element drives the movable rod to move to the first position, and the movable rod abuts the latch to bring the latch into the locked position.

[0013] In some embodiments, the seat belt retractor device further comprises an elastic return element, the elastic return element being connected to the movable rod. If the vehicle sensor information does not meet the release condition, the elastic return element pushes the movable rod into the second position, causing the movable rod to strike the pawl and move the pawl into the unlocked position; and / or if the vehicle sensor information meets the release condition, the electromagnetic release element and the electromagnetic induction element repel each other, the movable rod moves into the first position and pushes the pawl into the locked position, and the elastic return element is in a compressed state.

[0014] In some embodiments, the latch is provided with a locking end and an engagement end, which are arranged opposite each other, and an engagement area is formed between the locking end and the engagement end. If the vehicle sensor information does not meet the trigger condition, the movable rod is engaged in the engagement area, so that the latch is in the unlocked position; and if the vehicle sensor information meets the trigger condition, the locking end engages with the locking wheel to lock the locking wheel.

[0015] In some embodiments, at least one separating plate is arranged in the engagement area, and the separating plate is configured to divide the engagement area into a plurality of engagement slots. If the vehicle sensor information does not meet the triggering condition, the movable rod is engaged in one of the engagement slots to secure the latch in the unlocked position.

[0016] In some embodiments, at least one separating plate is arranged in the engagement area, and the separating plate is configured to divide the engagement area into a plurality of engagement slots. When the vehicle sensor information meets the trigger condition, the movable rod is engaged in one of the engagement slots and pushes the latch into the locking or unlocking position.

[0017] In some embodiments, a magnetic element is arranged in the engagement area, and a magnetic induction component is arranged on the movable rod. The magnetic induction component is configured to detect the magnetic field strength of the magnetic element and thereby confirm the position of the latch.

[0018] In some embodiments, the movable rod is provided with a limiting groove, and the limiting groove is configured to interact with a projection on a central cover of the seat belt retractor device to limit the movement of the movable rod.

[0019] In some embodiments, the engagement end comprises a first section and a second section, and the first section and the second section are connected to each other to form an L-shaped engagement surface.

[0020] In some embodiments, the locking unit further comprises a drive disc, one end of the pawl is movably connected to the drive disc and the other end of the pawl engages in a locking engagement with the locking wheel.

[0021] In some embodiments, the drive disc is arranged to lock or unlock a ratchet attached to the seat belt via a locking element, whereby the locking wheel controls the retraction of the seat belt.

[0022] According to a second aspect of this application, a transport device is specified which includes the seat belt retractor device according to the first aspect.

[0023] One of the technical effects of this application is as follows:

[0024] A seatbelt retractor device according to an embodiment of this application comprises a locking unit, wherein the locking unit includes a pawl and a locking wheel and the pawl can move into a locking position so that the pawl can lock the locking wheel; a control unit configured to acquire vehicle sensor information; and a movable rod, wherein the movable rod is configured such that, when the vehicle sensor information satisfies a trigger condition, the movable rod moves into a first position and pushes the pawl into the locking position, thereby locking the locking wheel.The movable rod can perform the locking of the locking wheel during movement, and the structure of the seat belt retractor device is simplified, thus improving the occupant experience and ensuring the ease of use of the seat belt.

[0025] Further features and advantages of this application will become apparent from the following detailed description of embodiments of this application with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are included in and form part of this description, illustrate embodiments of this application and, together with the description, serve to explain the principles of this application. Fig. Figure 1 is a diagram illustrating an action of a seat belt retractor device according to an embodiment of this application, in which the vehicle sensor information does not meet a triggering condition; Fig. Figure 2 is a diagram illustrating an action of a seat belt retractor device according to an embodiment of this application, wherein the vehicle sensor information fulfills a triggering condition; Fig. Figure 3 is a diagram of a vehicle sensor unit in a seat belt retractor device according to an embodiment of this application; Fig. 4 is an enlarged partial view of Fig. 1; Fig. 5 is an enlarged partial view of Fig. 2; Fig. Figure 6 is a first diagram of a movable rod in a seatbelt retractor device according to an embodiment of this application; Fig. Figure 7 is a second diagram of a movable rod in a seatbelt retractor device according to an embodiment of this application; Fig. Figure 8 is a first diagram of a latch in a seatbelt retractor device according to an embodiment of this application; Fig. Figure 9 is a second diagram of a latch in a seatbelt retractor device according to an embodiment of this application; Fig. Figure 10 is a third diagram of a latch in a seatbelt retractor device according to an embodiment of this application; Fig. 11 is a fourth diagram of a latch in a seat belt retractor device according to an embodiment of this application; Fig. Figure 12 is a fifth diagram of a latch in a seat belt retractor device according to an embodiment of this application; Fig. Figure 13 is a third diagram of a movable rod in a seatbelt retractor device according to an embodiment of this application; and Fig. Figure 14 is a diagram of a transport device according to an embodiment of this application.

[0027] In the drawings, the following apply: 200: Transport device; 100: Seat belt retractor device; 1: Locking unit; 12: Latch; 121: Locking end; 122: Engagement end; 122d1: First section; 122d2: Second section; 122d3: Contact surface; 12b: Decoupling end; 12c: Toothed end; 123: Separating plate; 124: Engagement area; 124a: Engagement slot; 13: Locking wheel; 14: Drive plate; 15: Locking element; 16: Middle cover; 17: Magnetic element; 2: Control unit; 20: Drive structure; 21: Movable rod; 21a: Suppression end; 21b: Return guide end; 21d: Limiting groove; 22: Electromagnetic release element; 23: electromagnetic induction element; 24: elastic restoring element; 25: magnetic induction component. DETAILED DESCRIPTION OF THE EXECUTION FORMS

[0028] Various embodiments of this application are described in more detail below with reference to the accompanying drawings. It should be noted that, unless otherwise stated, the relative arrangements, numerical expressions, and numerical values ​​of the components and steps depicted in these embodiments do not limit the scope of this application.

[0029] The following description of at least one embodiment serves only for illustration and is not intended to constitute a limitation of this application and its application or use.

[0030] Techniques, methods and devices known to those skilled in the art may not be described in detail, but such techniques, methods and devices should be considered as part of this description where appropriate.

[0031] In all the examples shown and discussed here, each specific value should be understood merely as an example and not as a limitation. Therefore, other examples of the implementations may have different values.

[0032] It should be noted that identical reference symbols in the following figures refer to similar concepts and therefore, once an element is defined in one figure, no further discussion is necessary in the subsequent figures.

[0033] Referring to Fig. 1 and Fig. Paragraph 2 provides for an embodiment of this application comprising a seat belt retractor device 100. The seat belt retractor device 100 includes a locking unit 1, wherein the locking unit 1 comprises a pawl 12 and a locking wheel 13, and the pawl 12 can move into a locking position so that the pawl 12 can lock the locking wheel 13 in the locking position. The locking wheel 13 is configured to control the retraction of a seat belt. For example, in a locked state, the pawl 12 engages the locking wheel 13 to limit the rotation of the locking wheel 13, and the locking wheel 13 can be configured to control the retraction of the seat belt during rotation.

[0034] The seat belt retractor device 100 further comprises a control unit 2. The control unit 2 is configured to acquire vehicle sensor information and determine whether or not the vehicle sensor information meets a triggering condition. The control unit 2 can be a controller within a vehicle system and can determine whether the vehicle sensor information is information that requires a trigger to lock the locking wheel 13, thereby preventing the locking wheel 13 from being accidentally triggered due to inaccurate vehicle sensor information.For example, if the inclination of a vehicle body is excessive or excessive acceleration occurs, this can cause a vehicle infotainment system to generate vehicle sensor information for locking the locking wheel 13. This vehicle sensor information includes information indicating that the seat belt should not be locked if a transport device 200 is parked on an incline or rolling at low speed; in this case, the vehicle sensor information does not meet the triggering condition. Furthermore, the vehicle sensor information also includes information indicating that the seat belt should be locked in the event of a collision involving the transport device 200; in this case, the vehicle sensor information does meet the triggering condition.The control unit 2 can determine, based on the parking or driving state of the transport device 200, whether the vehicle sensor information meets the triggering condition or not.

[0035] With reference to Fig. 2 The seat belt retractor device 100 further comprises a movable rod 21, which is able to move within the seat belt retractor device 100. The movable rod 21 is configured such that: when the vehicle sensor information meets the triggering condition, the movable rod 21 moves into a first position and pushes the pawl 12 into the locking position, so that the pawl 12 locks the locking wheel 13 to tighten the seat belt and protect an occupant. The interaction of the control unit 2 and the movable rod 21 can not only replace a conventional vehicle sensor structure with a steel ball to reduce vibrations and noise from the steel ball, but also prevent accidental triggering of the vehicle sensor information.

[0036] For example, the control unit can receive 2 signals from an acceleration sensor and a velocity sensor of the transport device 200 to perform real-time acceleration monitoring of the transport device 200, and receive signals from a position sensor, a lateral sensor, a vertical sensor, a gyroscope and the like of the transport device 200 to further determine a tilt state of the body of the transport device 200.Furthermore, immediate and future hazardous situations of the transport device 200 can be further evaluated by the synchronous combination of an intelligent driver assistance system and an active safety system of the transport device 200 in order to determine in advance whether a vehicle sensor must perform a restraint behavior in real time, that is, to determine whether the vehicle sensor information meets the trigger condition to send a trigger or non-trigger signal to the movable rod 21.

[0037] According to the seat belt retractor device 100 provided in an embodiment of this application, the control unit 2 determines, by analyzing and identifying various operating conditions, whether it is necessary to trigger the movable rod 21 to lock the locking unit 1 based on the vehicle sensor information, and then determines exactly one state of correct vehicle sensor triggering, thereby implementing corresponding functions for different operating condition requirements.

[0038] When the vehicle sensor information meets the triggering condition, that is, when the vehicle sensor must trigger the locking of the locking wheel 13 under an operating condition of the transport device 200, the movable rod 21 moves to the first position and pushes the pawl 12 into the locking position. In this case, the pawl 12 is switched to the locking position to lock the locking wheel 13. The action of the seat belt retractor device 100 corresponds to that of a conventional seat belt retractor, and the vehicle sensor triggers a locking function to ultimately secure the seat belt.

[0039] The seatbelt retractor device 100 provided in the embodiment of this application comprises a locking unit 1, a control unit 2, and a movable rod 21. The locking unit 1 includes a pawl 12 and a locking wheel 13, and the pawl 12 can be in a locking position so that it can lock the locking wheel 13. The control unit 2 is configured to acquire vehicle sensor information. When the vehicle sensor information meets the triggering condition, the movable rod 21 moves to a first position and pushes the pawl 12 into the locking position, thereby locking the locking wheel 13.The movable rod 21 locks the locking wheel 13 during movement, replacing a conventional vehicle sensor structure with steel balls and simplifying the structure of the seat belt retractor device 100, thereby improving the occupant experience and ensuring ease of use of the seat belt.

[0040] Furthermore, there is a specific action period in the process of retracting and releasing the seat belt restraint device. For example, when the seat belt is in a retracted state, the control unit 2 cannot immediately receive the vehicle sensor information. When the control unit 2 is in a non-retracted state, the movable rod 21 can immediately respond to a release signal and perform a release action of the latch 12.

[0041] In some embodiments, the latch 12 also has a release position. If the vehicle sensor information does not meet the triggering condition, the movable rod 21 moves to a second position and abuts the latch 12, thereby bringing the latch 12 into a release position.

[0042] The latch 12 can move into the unlocked position. When the latch 12 is in the unlocked or locked position, the movable rod 21 can move to abut the latch 12, thus moving it into the unlocked position. Alternatively, the latch 12 can be moved from the locked position to the unlocked position, and when the latch 12 is in the locked position, the movable rod 21 can move to push the latch 12 into the unlocked position.

[0043] It is evident that the latch 12 can lock or unlock the locking wheel 13. In an unlocked state, that is, when the latch 12 is in the unlocked position, the latch 12 is disengaged from the locking wheel 13, and the locking wheel 13, when rotated, can retract the seat belt by structural control. In other words, the retraction of the seat belt by the locking wheel 13 is controlled by the structure.

[0044] With reference to Fig. 1. If the vehicle sensor information does not meet the triggering condition, the movable rod 21 moves to the second position and engages the latch 12. A specific movement process may involve the movable rod 21 approaching and engaging the latch 12, thus placing the latch 12 in the unlocked position to prevent accidental release of the locking wheel 13.

[0045] If the Transport Device 200 is parked on a relatively steep incline, the vehicle body's position may cause a vehicle sensor in the vehicle's infotainment system to send vehicle sensor information to lock the locking wheel 13, even though it is actually just a matter of parking the Transport Device 200. When the Transport Device 200 needs to be restarted, the seat belt may not be able to be extended due to the locking mechanism, thus limiting its use. Alternatively, in off-road mode, the Transport Device 200 tends to creep slowly, and it may experience several rapid accelerations and decelerations within a short period of time.In this case, the risk is usually low, as the transport device 200 is in a low-speed state, but it is more likely that the vehicle sensor will continuously send vehicle sensor information to lock the locking wheel 13, thereby tightening the seat belt to press against the occupant, thus reducing the occupant's comfort.

[0046] The control unit 2 can provide two states precisely: correct vehicle sensor triggering or suppressed vehicle sensoring without triggering, and can also be configured to prevent the locking wheel 13 from locking if the vehicle sensor information does not meet the triggering condition.

[0047] If the vehicle sensor information does not meet the triggering condition—that is, if it is not necessary for the vehicle sensor to trigger the locking of the locking wheel 13 under the operating conditions—the movable rod 21 approaches the pawl 12 and engages with it, placing the pawl 12 in the unlocked position. The control unit 2 can prevent the locking wheel 13 from locking during this movement, and the vehicle sensor information is suppressed and limited, so the locking function is not triggered. The seat belt retractor device 100 does not trigger the locking of the locking wheel 13 based on vehicle sensor information, thus improving the occupant experience and ensuring the ease of use of the seat belt.

[0048] It should be noted that the unlocking and locking positions are not limited to a single fixed position, but can be fixed at a specific location or arranged within a defined range. For example, when the movable rod 21 engages with the latch 12, the latch 12 has multiple engagement positions. When the movable rod 21 interacts with one of the engagement positions on the latch 12, the latch 12 can be in the unlocked position, with a specific unlocked position of the latch 12 varying depending on the engagement position during different engagements.This means that the unlocking position and the locking position can be limited to a position or range within a length range, as long as the latch 12 is in the unlocking position to prevent accidental release of the locking wheel 13, or the latch 12 can be switched to the locking position to lock the locking wheel 13.

[0049] Likewise, the second position and the first position of the movable rod 21 are not limited to a fixed position, but can also be located within a certain range.

[0050] In some embodiments, the seat belt retractor device 100 comprises a drive structure 20, the drive structure 20 being connected to the movable rod 21. If the vehicle sensor information does not meet the triggering condition, the drive structure 20 drives the movable rod 21 to move into the second position and engage with and strike the pawl 12; and / or if the vehicle sensor information meets the triggering condition, the drive structure 20 drives the movable rod 21 to move into the first position.

[0051] For example, the movable rod 21 can engage with the pawl 12 by moving within the seatbelt retractor device 100, placing the pawl 12 in the unlocked position to prevent accidental release of the locking wheel 13. The drive structure 20 can control the movement of the movable rod 21. For example, the drive structure 20 can be a motor, and the movable rod 21 is connected to the motor. The movable rod 21 abuts the pawl 12, or the movable rod 21 pushes the pawl 12 by forward and reverse rotations of the motor to ensure flexibility in the movement of the movable rod 21.

[0052] In some embodiments, with reference to Fig. 3, the drive structure 20 comprises an electromagnetic release element 22 and an electromagnetic induction element 23, wherein the electromagnetic release element 22 is electrically connected to the control unit 2 and the electromagnetic induction element 23 is arranged on the movable rod 21.If the vehicle sensor information meets the triggering condition, the electromagnetic trigger element 22 and the electromagnetic induction element 23 attract each other, and the electromagnetic induction element 23 drives the movable rod 21 to move into the first position and push the latch 12 into the locking position; and / or if the vehicle sensor information does not meet the triggering condition, the electromagnetic trigger element 22 and the electromagnetic induction element 23 repel each other, the electromagnetic induction element 23 drives the movable rod 21 to move into the second position, and the movable rod 21 pushes against the latch 12 to bring the latch 12 into the unlocking position.

[0053] For example, the seat belt retractor device 100 can comprise a base, a middle cover 16, and an outer cover. The middle cover 16 is positioned between the base and the outer cover to support components within the seat belt retractor device 100. In one embodiment, the movable rod 21 and the drive structure 20 can be integrally attached to the middle cover 16. The electromagnetic release element 22 can interact with the control unit 2 to receive a release or unlock signal from the control unit 2 and then execute corresponding locking and unlocking actions via the movable rod 21. In another embodiment, the movable rod 21 and the drive structure 20 can be positioned between the base and the outer cover but separate from the middle cover 16.

[0054] For example, if the vehicle sensor information meets the triggering condition, the electromagnetic release element 22, upon receiving a trigger signal, initiates the electromagnetic release, then attracts the electromagnetic induction element 23 by magnetic force, and the electromagnetic induction element 23 drives the movable rod 21 into the first position in the event of a connection. The electromagnetic release element 22 receives the magnetically attracted electromagnetic release signal to reset the movable rod 21 and the electromagnetic induction element 23 to specific initial positions. In this case, the latch 12 is switched to the locking position and locks the locking wheel 13 to tighten the seat belt and protect the occupant.

[0055] For example, switching the movable rod 21 between the second position and the first position can be achieved by a linear movement, or by a rotation or a curved movement. For example, the movable rod could be a straight rod, a curved rod, or even a spiral rod.

[0056] For example, in the second position the movable rod 21 can engage with the latch 12 to hold the latch back and thereby suppress a vehicle sensor information function.

[0057] For example, the electromagnetic release element 22 and the electromagnetic induction element 23 can each comprise an electromagnet to effect mutual attraction or repulsion between the electromagnetic release element 22 and the electromagnetic induction element 23 by controlling coil current in the electromagnetic release element 22 and the electromagnetic induction element 23. Furthermore, the movable rod 21 can, by means of a magnetic induction effect between the electromagnetic release element 22 and the electromagnetic induction element 23, strike or press the latch 12.

[0058] Furthermore, the electromagnetic release element 22 can comprise an electromagnet, while the electromagnetic induction element 23 can be a magnetic object. This creates a mutual attraction between the electromagnetic release element 22 and the electromagnetic induction element 23 when a current is switched on in the electromagnetic release element 22, causing the movable rod 21 to approach the latch 12. When the electromagnetic release element 22 is not energized, the electromagnetic interaction between the electromagnetic release element 22 and the electromagnetic induction element 23 is canceled, and the objective of pushing the latch 12 through the movable rod 21 is achieved by the deformation of the elastic return element, for example, a spring.

[0059] In some embodiments, with reference to Fig. 3, the seat belt retractor device 100 further comprises an elastic return element 24, the elastic return element 24 being connected to the movable rod 21. If the vehicle sensor information does not meet the triggering condition, the elastic return element 24 pushes the movable rod 21 into the second position, so that the movable rod 21 abuts the latch 12 to bring the latch 12 into the unlocked position; and / or if the vehicle sensor information meets the triggering condition, the electromagnetic release element 22 and the electromagnetic induction element 23 attract each other, the movable rod 21 moves into the first position and pushes the latch 12 into the locked position, and the elastic return element 24 is in a compressed state.

[0060] For example, if the vehicle sensor information does not meet the trigger condition, the elastic return element 24 can have a restoring force to return it to the compressed state, and the restoring force of the elastic return element 24 can push the movable rod 21 into the second position, so that the movable rod 21 abuts the pawl 12 to bring the pawl 12 into the unlocked position. In another embodiment, if the vehicle sensor information does not meet the trigger condition, the elastic return element 24 can have a restoring force in a stretched state, and the restoring force of the elastic return element 24 can pull the movable rod 21 into the second position, so that the movable rod 21 abuts the pawl 12 to bring the pawl 12 into the unlocked position.

[0061] In other embodiments, the electromagnetic release element 22 and the electromagnetic induction element 23 repel each other when the vehicle sensor information meets the release condition, the movable rod 21 moves to the first position and pushes the latch 12 into the locking position, and the elastic return element 24 is in the extended state.

[0062] In some embodiments, the drive structure 20 comprises an electromagnetic release element 22 and an electromagnetic induction element 23, the electromagnetic release element 22 is electrically connected to the control unit 2, and the electromagnetic induction element 23 is arranged on the movable rod 21.If the vehicle sensor information does not meet the triggering condition, the electromagnetic trigger element 22 and the electromagnetic induction element 23 attract each other, and the movable rod 21 moves to the second position, so that the movable rod 21 abuts the latch 12 to bring the latch 12 into the unlocked position; and / or if the vehicle sensor information meets the triggering condition, the electromagnetic trigger element 22 and the electromagnetic induction element 23 repel each other, the electromagnetic induction element 23 drives the movable rod 21 to move to the first position, and the movable rod 21 abuts the latch 12 to bring the latch 12 into the locked position.

[0063] In some embodiments, the seat belt retractor device 100 further comprises an elastic return element 24, wherein the elastic return element 24 is connected to the movable rod 21. If the vehicle sensor information does not meet the release condition, the elastic return element 24 pushes the movable rod 21 into the second position, so that the movable rod 21 abuts the latch 12 to move the latch 12 into the unlocked position; and / or if the vehicle sensor information meets the release condition, the electromagnetic release element 22 and the electromagnetic induction element 23 repel each other, the movable rod 21 moves into the first position and pushes the latch 12 into the locked position, and the elastic return element 24 is in a compressed state.

[0064] In some embodiments, with reference to Fig. 8 to Fig. In section 11, the latch 12 has a locking end 121 and an engagement end 122, which are arranged opposite each other, and an engagement area 124 is formed between the locking end 121 and the engagement end 122. If the vehicle sensor information does not meet the trigger condition, the movable rod 21 is engaged in the engagement area 124, so that the latch 12 is in the unlocked position. If the vehicle sensor information meets the trigger condition, the locking end 121 engages the locking wheel 13 to lock the locking wheel 13.

[0065] For example, if the vehicle sensor information does not meet the triggering condition, the movable rod 21 approaches the latch 12 and extends into the engagement area 124, and the movable rod 21 can engage with the latch 12, so that the latch 12 is in the unlocking position to prevent the locking wheel 13 from being accidentally triggered.

[0066] When the vehicle sensor information meets the triggering condition, the movable rod 21 pushes the latch 12 into the locking position and can engage with the locking wheel 13 via the locking end 121 to lock the locking wheel 13 in order to tighten the seat belt and protect the occupant.

[0067] In some embodiments, with reference to Fig. 10 and Fig. 11, at least one separating plate 123 is arranged in the engagement area 124, and the separating plate 123 is configured to divide the engagement area 124 into a plurality of engagement slots 124a. If the vehicle sensor information does not meet the triggering condition, the movable rod 21 is engaged in one of the engagement slots 124a to secure the latch 12 in the unlocked position.

[0068] For example, the separating plate 123 can divide a section between the locking end 121 and the engagement end 122 to guide the latch 12 further, enabling it to engage smoothly with the movable rod 21 during an unlocking and resetting process. If the vehicle sensor information does not meet the triggering condition, the movable rod 21 can be raised and lowered to various positions to fix the latch 12 in the unlocked position, allowing the latch 12 to engage with the movable rod 21 during a relatively short rotational stroke, thus reducing the rotational stroke and rotation time of the latch 12.

[0069] In some embodiments, with reference to Fig. 10 and Fig. 11, at least one separating plate 123 is arranged in the engagement area 124, and the separating plate 123 is configured to divide the engagement area 124 into a plurality of engagement slots 124a. When the vehicle sensor information meets the triggering condition, the movable rod 21 is engaged in one of the engagement slots 124a and pushes the latch 12 into the locking or unlocking position, and the locking wheel 13 can be locked when the latch 12 is switched into the locking position.

[0070] For example, the separating plate 123 divides a large area between the locking end 121 and the engagement end 122 into a plurality of smaller areas. When the movable rod 21 is engaged in one of the engagement slots 124a and the latch 12 is pressed, the stroke of the movable rod 21 in the engagement slot 124a can be reduced. Based on the improved stability of the engagement of the movable rod 21 in one of the engagement slots 124a, the pressure stroke and pressure time of the movable rod 21 are reduced.

[0071] After a locking function is completed, the latch 12 is rotated and reset to the unlocking position; if the engagement area 124 is divided into a plurality of engagement slots 124a, a plurality of engagement positions can be formed on the latch 12. Regardless of whether the latch 12 is rotated into any position, the latch 12 can engage with the movable rod 21 during a relatively short rotational stroke to reduce the rotational stroke and rotation time of the latch 12, improve the response speed of the latch 12 upon engagement, and further prepare to trigger the next vehicle sensor information in a timely manner.

[0072] If the latch 12 enables multi-stage engagement with the movable rod 21, the movable rod 21 can be driven by receiving a trigger signal from the entire vehicle to cause a connection release of the locking device 1, so that the vehicle sensor can be removed and the seat belt retractor device 100 can serve as an active vehicle sensor mechanism.

[0073] Additionally, several engagement positions can be formed on an end section of the movable rod 21 to facilitate engagement between the latch 12 and the movable rod 21.

[0074] In some embodiments, with reference to Fig. 12 and Fig. In section 13, a magnetic element 17 is arranged in the engagement area 124, and a magnetic induction component 25 is arranged on the movable rod 21. The magnetic induction component 25 is configured to detect the magnetic field strength of the magnetic element 17 in order to confirm the position of the latch 12.

[0075] In particular, when the latch 12 is in the unlocked position, the magnetic induction component 25 can detect that the magnetic field strength of the magnetic element 17 is a first magnetic field strength. When the latch 12 is in the locked position, the magnetic induction component 25 can detect that the magnetic field strength of the magnetic element 17 is a second magnetic field strength, which differs from the first magnetic field strength. The magnetic induction component 25 and the magnetic element 17 can establish contactless communication between the movable rod 21 and the latch 12, thus enabling rapid determination of whether the latch 12 is in the unlocked or locked position. This further optimizes the space utilization of the seat belt retractor device 100 and reduces structural limitations of the units within the seat belt retractor device 100.

[0076] In some embodiments, with reference to Fig. 8 and Fig. 9, the latch 12 has a locking end 121 and an engagement end 122, which are arranged opposite each other, and an engagement area 124 is formed between the locking end 121 and the engagement end 122. The engagement end 122 comprises a first section 122d1 and a second section 122d2, and the first section 122d1 and the second section 122d2 are connected to each other to form an L-shaped engagement surface.

[0077] For example, the engagement end 122 can further comprise a contact surface 122d3, which is triggered by the vehicle sensor, and the movable rod 21 remains in contact with the contact surface 122d3 during its movement to achieve the objective of driving the pawl 12 by the movable rod 21 to switch between the unlocked and locked positions. The L-shaped engagement surface formed by the first section 122d1 and the second section 122d2 can surround the movable rod 21 to ensure the reliability of the engagement and interaction between the movable rod 21 and the pawl 12.

[0078] Furthermore, the latch 12 also comprises a decoupling end 12b and a toothed end 12c. After the locking unit 1 is locked, the decoupling end 12b can be in contact with the outer cover to decouple the latch 12, thereby reducing both the release stroke of the latch 12 and the risk of damage from impacts. The toothed end 12c engages a circumferential tooth section of the locking wheel 13 to lock the locking wheel 13 by means of a connection.

[0079] In some embodiments, with reference to Fig. 6 and Fig. 7, the movable rod 21 is provided with a limiting groove 21d, and the limiting groove 21d is designed to interact with a projection on the central cover 16 to limit the movement of the movable rod 21.

[0080] For example, the movable rod 21 comprises a suppression end 21a and a return guide end 21b. The suppression end 21a is a feature configured for a release contact and can be in contact with a striking surface of the latch 12 to switch the latch 12 into the unlocked position, thereby implementing a release suppression function. The return guide end 21b can be in contact with the elastic return element 24 to effect an axial return movement of the movable rod 21. The projection on the central cover 16 is embedded in the limiting groove 21d, so that the movement of the movable rod 21 is limited by the projection on the central cover 16, preventing the movable rod 21 from having an excessively large stroke and ensuring the assemblial stability of the electromagnetic induction element 23 on the movable rod 21.

[0081] Furthermore, during a stroke in which the movable rod 21 approaches the pawl 12 and engages with it, the projection on the central cover 16 can abut a side wall of the limiting groove 21d to prevent an excessively large stroke of the movable rod 21. During the stroke of the movable rod 21, the projection on the central cover 16 can abut the other side wall of the limiting groove 21d to prevent an excessively large return stroke of the movable rod 21.

[0082] In some embodiments, with reference to Fig. 1 and Fig.2, the locking unit 1 further comprises a drive disc 14, wherein one end of the pawl 12 is movably connected to the drive disc 14 and the other end of the pawl 12 is in locking engagement with the locking wheel 13, thereby realizing a retraction of the safety belt by the locking wheel 13 under a structural control.

[0083] In some embodiments, the drive disc 14 is rotatably connected to a seat belt retractor unit comprising a seat belt by means of a locking element 15. In particular, the drive disc 14 locks or unlocks a ratchet attached to the seat belt via the locking element 15, whereby the locking wheel 13 controls the retraction of the seat belt.

[0084] When the vehicle sensor information meets the triggering condition, the movable rod 21 moves into the first position, the latch 12 is switched into the locking position to lock the locking wheel 13, so that the drive disc 14 and the locking wheel 13 can be locked together, the connection between the locking wheel 13, the latch 12 and the drive disc 14 is established and the seat belt is tightened via the locking link 15 to protect the occupant.

[0085] One embodiment of this application provides a transport device 200, wherein the transport device 200 comprises a seat belt retractor device 100.

[0086] In particular, in the seatbelt retractor device 100 of the transport device 200, if the vehicle sensor information does not meet a triggering condition, a movable rod 21 moves to a second position and engages a latch 12, so that the latch 12 is in an unlocked position. The movable rod 21 can lock the locking wheel 13 during its movement. In this case, the vehicle sensor information is suppressed and does not trigger a locking function, thus improving the occupant experience and ensuring the ease of use of the transport device 200.

[0087] Although some specific embodiments of this application have been described in detail by means of examples, it should be clear to those skilled in the art that the foregoing examples serve only for descriptive purposes and are not intended to limit the scope of this application. It should be clear to those skilled in the art that modifications can be made to the foregoing embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the attached claims. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 202321030225.2

[0001]

Claims

[1] Seat belt retractor device (100), comprising: a locking unit (1) comprising a latch (12) and a locking wheel (13), wherein the latch (12) can move into a locking position so that the latch (12) can lock the locking wheel (13), and the locking wheel (13) is configured to control the retraction of a seat belt; a control unit (2) configured to acquire vehicle sensor information and to determine whether the vehicle sensor information meets a trigger condition or not; and a movable rod (21) wherein the movable rod is arranged such that, when the vehicle sensor information meets the triggering condition, the movable rod (21) moves into a first position and pushes the latch (12) into the locking position, thereby locking the latch (12) the locking wheel (13). [2] Seat belt retractor device (100) according to claim 1, wherein the latch can move into an unlocking position or the latch (12) can be switched from the locking position to an unlocking position; and, if the vehicle sensor information does not meet the triggering condition, the movable rod (21) moves into a second position and abuts the latch (12), thereby bringing the latch (12) into the unlocking position. [3] Seat belt retractor device (100) according to claim 2, further comprising a drive structure (20) wherein the drive structure (20) is connected to the movable rod (21); If the vehicle sensor information does not meet the triggering condition, the drive structure (20) drives the movable rod (21) to move into the second position in order to engage with and strike the latch (12); and / or When the vehicle sensor information meets the trigger condition, the drive structure (20) drives the movable rod (21) to move into the first position. [4] Seat belt retractor device (100) according to claim 3, wherein the drive structure (20) comprises an electromagnetic release element (22) and an electromagnetic induction element (23), wherein the electromagnetic release element (22) is electrically connected to the control unit (2) and the electromagnetic induction element (23) is arranged on the movable rod (21); when the vehicle sensor information meets the triggering condition, the electromagnetic triggering element (22) and the electromagnetic induction element (23) attract each other and the electromagnetic induction element (23) drives the movable rod (21) to move into the first position and pushes the latch (12) into the locking position, and / or If the vehicle sensor information does not meet the triggering condition, the electromagnetic triggering element (22) and the electromagnetic induction element (23) repel each other, the electromagnetic induction element (23) drives the movable rod (21) to move into the second position, and the movable rod (21) pushes the latch (12) to bring the latch into the unlocking position. [5] Seat belt retractor device (100) according to claim 4, further comprising an elastic return element (24) wherein the elastic return element (24) is connected to the movable rod (21); If the vehicle sensor information does not meet the triggering condition, the elastic return element (24) pushes the movable rod (21) into the second position, so that the movable rod (21) abuts the latch (12) to bring the latch into the unlocking position; and / or When the vehicle sensor information meets the triggering condition, the electromagnetic triggering element (22) and the electromagnetic induction element (23) attract each other, the movable rod (21) moves into the first position and pushes the latch (12) into the locking position and the elastic return element (24) is in a compressed state. [6] Seat belt retractor device (100) according to claim 3, wherein the drive structure (20) comprises an electromagnetic release element (22) and an electromagnetic induction element (23), the electromagnetic release element (22) is electrically connected to the control unit (2) and the electromagnetic induction element (23) is arranged on the movable rod (21); If the vehicle sensor information does not meet the triggering condition, the electromagnetic triggering element (22) and the electromagnetic induction element (23) attract each other, the movable rod (21) moves into the second position, so that the movable rod (21) abuts the latch (12) to bring the latch into the unlocking position, and / or When the vehicle sensor information meets the triggering condition, the electromagnetic triggering element (22) and the electromagnetic induction element (23) repel each other, the electromagnetic induction element (23) drives the movable rod (21) to move into the first position, and the movable rod (21) pushes the latch (12) to bring the latch into the locking position. [7] Seat belt retractor device (100) according to claim 6, further comprising an elastic return element (24) wherein the elastic return element (24) is connected to the movable rod (21); If the vehicle sensor information does not meet the triggering condition, the elastic return element (24) pushes the movable rod (21) into the second position, so that the movable rod (21) abuts the latch (12) to bring the latch into the unlocking position; and / or when the vehicle sensor information meets the triggering condition, the electromagnetic triggering element (22) and the electromagnetic induction element (23) repel each other, the movable rod (21) moves into the first position and pushes the latch (12) into the locking position and the elastic return element (24) is in a compressed state. [8] Seat belt retractor device (100) according to one of claims 1 to 7, wherein the latch (12) is provided with a locking end (121) and an engagement end (122) which are arranged opposite each other, and an engagement area is formed between the locking end (121) and the engagement end (122); If the vehicle sensor information does not meet the triggering condition, the movable rod (21) is engaged in the engagement area, so that the latch (12) is in the unlocking position; and When the vehicle sensor information meets the trigger condition, the locking end (121) engages the locking wheel (13) to lock the locking wheel (13). [9] Seat belt retractor device (100) according to claim 8, wherein at least one separating plate (123) is arranged in the engagement area (124) and the separating plate (123) is configured to divide the engagement area (124) into a plurality of engagement slots (124a); and, if the vehicle sensor information does not meet the triggering condition, the movable rod (21) is engaged in one of the engagement slots (124a) to secure the latch (12) in the unlocking position. [10] Seat belt retractor device (100) according to claim 8 or 9, wherein at least one separating plate (123) is arranged in the engagement area (124) and the separating plate (123) is configured to divide the engagement area (124) into a plurality of engagement slots (124a); and, when the vehicle sensor information meets the triggering condition, the movable rod (21) is engaged in one of the engagement slots (124a) and the latch (12) is pressed into the locking position or the unlocking position. [11] Seat belt retractor device (100) according to one of claims 8 to 10, wherein a magnetic element (17) is arranged in the engagement area (124) and a magnetic induction component (25) is arranged on the movable rod (21) and the magnetic induction component (25) is configured to detect the magnetic field strength of the magnetic element (17) in order to confirm a position of the latch (12). [12] Seat belt retractor device (100) according to any one of claims 8 to 11, wherein the engagement end (122) comprises a first section (122d1) and a second section (122d2) and the first section (122d1) and the second section (122d2) are connected to each other to form an L-shaped engagement surface. [13] Seat belt retractor device (100) according to any one of claims 1 to 12, wherein the movable rod (21) is provided with a limiting groove (21d) and the limiting groove (21d) is configured to interact with a projection on a central cover (16) of the seat belt retractor device (100) to limit the movement of the movable rod (21). [14] Seat belt retractor device (100) according to one of claims 1 to 13, wherein the locking unit (1) further comprises a drive disc (14), one end of the pawl (12) is movably connected to the drive disc (14) and the other end of the pawl (12) engages in locking engagement with the locking wheel (13). [15] Seat belt retractor device (100) according to claim 14, wherein the drive disc (14) is configured to lock or unlock a ratchet attached to the seat belt via a locking element (15), whereby the locking wheel (13) controls the retraction of the seat belt. [16] Transport device (200) comprising the seat belt retractor device (100) according to any one of claims 1 to 15.

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