A retractable locking device for a seat belt, a seat belt system and a vehicle

Abstract

The application discloses a telescopic locking device for a safety belt, a safety belt system and a vehicle, the locking device comprising a lock head, a traction piece and a winding mechanism, the winding mechanism comprising a rotating shaft and a spiral guide arranged outside the rotating shaft, one end of the traction piece being connected with the lock head, the other end of the traction piece being fixedly connected with the rotating shaft, and the rotating shaft being used for rotating to drive the traction piece to move along the spiral guide. The locking device can automatically extend and retract, the lock head of the locking device is arranged at the front part of a seat cushion, and the lock head is more flexible. The second locking matching piece is connected with the locking device, the safety belt can be changed from a common three-point type to a four-point type, and therefore the safety restraint effect of preventing the hip from moving forward in a dynamic collision and a lying position can be achieved.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, specifically to a retractable locking device for seat belts, a seat belt system, and a vehicle. Background Technology

[0002] With the emergence of numerous new vehicle design concepts, seatbelt systems remain crucial for occupant protection in traffic accidents. Existing standard three-point seatbelts have their locking devices located on the side of the seat. In a collision, these effectively restrain occupant movement in a normal sitting position, providing protection. However, when the seat is adjusted to a reclining position, the standard three-point seatbelt fails to effectively restrain the occupant's hips from forward movement, thus failing to achieve the desired restraint effect. Furthermore, existing locking devices are fixed in position, have poor locking mechanism flexibility, and are not adjustable. Adding locking points to other locations on the seat would require significant space, impacting seat comfort and aesthetics. Therefore, it is necessary to provide a seatbelt system with an adjustable locking mechanism, increased locking mechanism flexibility, and the ability to effectively restrain hip movement when the seat is in a reclining position. Summary of the Invention

[0003] In order to solve the problems of non-adjustable locking devices and the inability of ordinary three-point seat belts to effectively restrain the forward movement of the occupant's hips and achieve the desired safety restraint effect.

[0004] This application provides a retractable locking device for seat belts. The locking device includes a lock head, a traction member, and a winding mechanism. The winding mechanism includes a rotating shaft and a spiral guide disposed outside the rotating shaft. One end of the traction member is connected to the lock head, and the other end of the traction member is fixedly connected to the rotating shaft. The rotating shaft is used to rotate and drive the traction member to move along the spiral guide.

[0005] Furthermore, the locking device includes a fixed base, on which a guide rail is provided, and the guide rail is connected to the spiral guide.

[0006] Furthermore, the guide rail is an arc-shaped groove.

[0007] Furthermore, the locking device includes a telescopic sleeve and a lock head support, the lock head support being connected to the lock head, and the lock head support, the telescopic sleeve, and the fixed base being connected in sequence.

[0008] Furthermore, the locking device includes a drive motor, the output end of which is connected to the rotating shaft via a transmission connection.

[0009] Furthermore, the traction component is a wire rope or chain.

[0010] This application also provides a seat belt system, including a seat belt, a fixing fastener, and the aforementioned retractable locking device. The two ends of the seat belt are fixed to one side of the seat, and the fixing fastener is fixed to the other side of the seat. The locking device is connected to the seat, and the locking head of the locking device is located at the front of the seat cushion.

[0011] The seat belt is provided with a first locking fitting and a second locking fitting. The first locking fitting can be connected to the fixed locking device, and the second locking fitting can be connected to the locking device.

[0012] Furthermore, it includes a controller for controlling the telescopic movement of the locking device.

[0013] Furthermore, this includes occupant detection sensors and seat angle sensors;

[0014] The occupant detection sensor is used to detect the occupancy status of the seat;

[0015] The seat angle sensor is used to detect the seat back angle;

[0016] The controller is used to receive detection signals from the occupant detection sensor and the seat angle sensor, and control the extension and retraction of the lock head according to the detection signals.

[0017] This application also provides a vehicle including the aforementioned seatbelt system.

[0018] Implementing the embodiments of the present invention has the following beneficial effects:

[0019] (1) The lock head of the telescopic locking device of this application can move in a telescopic manner. The rotation of the shaft of the winding mechanism drives the traction member to move along the spiral guide, which can drive the lock head to move in a telescopic manner, thus increasing the flexibility of the lock head. The movement path of the traction member is spiral, which can effectively reduce the space occupied by the locking device.

[0020] (2) The lock head of the retractable locking device of this application is located in the front of the middle of the seat cushion. A locking point is added in the middle of the seat cushion. The locking point is located between the occupant's thighs. The second locking fitting is connected to the locking device. The seat belt is changed from a normal three-point type to a four-point type, thereby satisfying the safety restraint effect of preventing the hip from moving forward in dynamic collisions and lying positions.

[0021] (3) The locking device of this application is combined with the controller, the occupant detection sensor and the seat angle sensor, so that the locking device has an automatic extension and retraction function. When the occupant adjusts the seat between the sitting and reclining positions, the locking device can be automatically extended and retracted, which can switch the seat belt between the ordinary three-point and four-point types. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the present invention, the accompanying drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a retractable locking device for a seat belt according to an embodiment of the present invention;

[0024] Figure 2 This is an exploded structural diagram of the locking device according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of a seat belt system according to an embodiment of the present invention;

[0026] Figure 4 This is the wearing procedure of the three-point seat belt system according to an embodiment of the present invention;

[0027] Figure 5 This is the wearing procedure of the four-point seat belt system according to an embodiment of the present invention;

[0028] Figure 6 This is the conversion process from a four-point seat belt system to a three-point system according to an embodiment of the present invention.

[0029] In the figure, the corresponding reference numerals are as follows: 10-locking device, 20-seat belt, 21-first locking mating part, 22-second locking mating part, 30-fixed buckle, 40-seat, 50-seat cushion, 1-liftable lock head, 2-traction part, 3-winding mechanism, 31-rotating shaft, 311-driven gear, 32-spiral guide, 4-fixed base, 41-guide rail groove, 5-telescopic sleeve, 6-lock head support, 7-drive motor, 71-drive gear. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be understood that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0032] Furthermore, in this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] Example

[0034] like Figure 1 and 2 As shown, this embodiment provides a retractable locking device for seat belts. The locking device 10 includes a lock head 1, a traction member 2, and a winding mechanism 3. The winding mechanism 3 includes a rotating shaft 31 and a spiral guide 32 disposed outside the rotating shaft 31. One end of the traction member 2 is connected to the lock head 1, and the other end of the traction member 2 is fixedly connected to the rotating shaft 31. The rotating shaft 31 is used to rotate and drive the traction member 2 to move along the spiral guide 32.

[0035] In this embodiment, the locking head 1 of the locking device 10 can extend and retract. The rotation of the shaft 31 of the winding mechanism 3 drives the traction member 2 to move along the spiral guide member 32, thereby driving the locking head 1 to extend and retract, increasing the flexibility of the locking head 1. The movement path of the traction member 2 is spiral, and the spiral winding and retraction of the traction member 2 can effectively reduce the space required for movement, thereby reducing the space occupied by the locking device 10.

[0036] Specifically, the traction component 2 can be a steel wire rope or a chain. Preferably, it can be a steel wire rope that is easy to wind and has a certain rigidity. The spiral guide component 32 is a spiral groove or guide cavity arranged on the outside of the rotating shaft 31.

[0037] Specifically, the locking device 10 includes a fixed base 4, on which a guide rail 41 is provided, and the guide rail 41 is connected to the spiral guide member 32. The guide rail 41 can be an arc-shaped groove or an arc-shaped guide cavity. The arc-shaped guide rail 41 and the spiral guide member 32 form a complete traction member movement path. The arc-shaped guide rail 41 also reduces the space occupied by the traction member 2, thereby reducing the space occupied by the locking device 10. The fixed base 4 can be used to connect the locking device 10 to the vehicle floor, while the guide rail 41 and the spiral guide member 32 are connected to support and restrict the movement path of the traction member 2, so that the traction member 2 can move smoothly along the guide rail 41 and the spiral guide member 32.

[0038] Specifically, the locking device 10 includes a telescopic sleeve 5 and a lock head support 6. The lock head support 6 is connected to the lock head 1, and the lock head support 6, the telescopic sleeve 5, and the fixed base 4 are connected in sequence. The lock head support 6 is sleeved under the lock head 1 to support and protect the lock head 1 while ensuring its appearance and connection stability. The telescopic sleeve 5 is disposed between the lock head support 6 and the fixed base 4. In this embodiment, the telescopic sleeve 5 can be an elastic rubber telescopic sleeve, or it can be other protective sleeve materials with telescopic properties such as canvas telescopic sleeves or paper telescopic sleeves. The telescopic sleeve 5 can protect the middle traction component 2 from being exposed when the lock head 1 is extended or retracted.

[0039] Specifically, the locking device 10 includes a drive motor 7, the output end of which is connected to the rotating shaft 31 for transmission. In this embodiment, the output end of the drive motor 7 is provided with a drive gear 71, and the rotating shaft 31 is provided with a driven gear 311. The drive gear 71 and the driven gear 311 mesh to transmit motor power.

[0040] In this embodiment, the locking device 10 drives the rotating shaft 311 to rotate via the drive motor 7, which in turn moves the traction member 2 along the spiral guide member 32 and the guide rail 41, thereby pulling the lock head 1 to extend and retract. In some embodiments, the lock head 1 can be located under the seat cushion cover. When the lock head 1 retracts and descends under the seat cushion, the seat cushion cover returns to its original shape, without affecting the seat's appearance or seating comfort.

[0041] like Figure 3As shown, this embodiment also provides a seat belt system, including a seat belt 20, a fixing fastener 30, and a retractable locking device 10. Both ends of the seat belt 20 are fixed to one side of the seat 40. Specifically, one end of the seat belt is fixed to the seat back via a retractor, and the other end is fixed to the side or bottom of the seat cushion. The fixing fastener 30 is fixed to the other side of the seat 40. The locking device 10 is connected to the seat 40, and the locking head 1 of the locking device 10 is located at the front of the seat cushion 50. Specifically, the seat cushion is divided into two equal parts laterally, with the front half being the front portion of the seat cushion. In this embodiment, the locking device 10 is connected to and fixed under the seat cushion 50, and the locking head 1 is located in the middle of the front portion of the seat cushion 50. The locking head 1 can be raised or lowered from under the seat cushion cover. When the passenger sits down, the locking head 1 is located between the passenger's legs. In some embodiments, the seat cushion surface is designed with a leather cover. When the lock 1 retracts and descends under the seat cushion, the leather cover returns to its original state, without affecting the appearance of the seat or the passenger's comfort.

[0042] Specifically, the seat belt 20 is provided with a first locking engagement 21 and a second locking engagement 22. The first locking engagement 21 can be connected to the fixing fastener 30, and the second locking engagement 22 can be connected to the locking device 10. It should be noted that in this embodiment, the first locking engagement 21 and the second locking engagement 22 have different structural shapes, that is, the first locking engagement 21 cannot be mistakenly inserted into the locking device 10, and the second locking engagement 22 cannot be mistakenly inserted into the fixing fastener 30, which can prevent passengers from inserting them into the wrong position.

[0043] Specifically, when the first locking engagement 21 is connected to the fixing locking element 30, and the second locking engagement 22 is connected to the locking device 10, a four-point seat belt system is formed. The locking head 1 of the locking device 10 is located in the front center of the seat cushion. Adding a locking point in the middle of the seat cushion, located between the occupant's thighs, connects the second locking engagement to the locking device, changing the seat belt from a standard three-point to a four-point system. This achieves the safety restraint effect of preventing forward hip displacement during a dynamic collision. Especially when the occupant is in a reclining position, it also prevents the occupant from sliding forward, avoiding the danger of ineffective restraint or the neck being strangled by the seat belt due to displacement.

[0044] Specifically, the seatbelt system in this embodiment includes a controller for controlling the telescopic movement of the locking device 10. Specifically, the controller controls the drive motor 7, thereby controlling the telescopic movement of the locking device 10. In some embodiments, the controller can be controlled according to simple manual pressing or electric switch commands.

[0045] In some embodiments, the controller may be an automatic control unit, and the seat belt system may also include an occupant detection sensor and a seat angle sensor; the occupant detection sensor is used to detect the occupant occupancy of the seat; the seat angle sensor is used to detect the seat back angle; and the controller is used to receive the detection signals from the occupant detection sensor and the seat angle sensor, and control the extension and retraction of the locking head 1 of the locking device 10 according to the detection signals.

[0046] Specifically, such as Figure 4 The wearing procedure for a three-point seat belt system is as follows: When the controller receives a signal that the seat is occupied and the seat back angle is less than or equal to a preset angle, the occupant only needs to connect the first locking engagement piece 21 to the fixed locking piece 30 to complete the wearing process and form a three-point seat belt system;

[0047] like Figure 5 The wearing procedure for a four-point seat belt system is as follows: When the controller receives a signal that the seat is occupied and the seat back angle is greater than the preset angle, the controller controls the lock head 1 under the seat cushion to rise, based on the connection between the first locking engagement 21 and the fixed locking device 30. At this time, the second locking engagement 22 is connected to the locking device 10 to complete the wearing process and form a four-point seat belt system.

[0048] like Figure 6 This describes the conversion process from a four-point seatbelt system to a three-point seatbelt system. When the controller receives a signal that the seat is occupied and the seat back angle is less than or equal to a preset angle, it unlocks the second locking engagement 22 from the locking device 10. Upon receiving the unlock signal, the controller controls the locking head 1 of the locking device 10 to descend, thus converting the system to a three-point seatbelt system.

[0049] If a passenger needs to unlock the seatbelt, they only need to unlock the first locking engagement piece 21 and the fixed locking piece 30 to completely release the seatbelt. This design allows for free switching between three-point and four-point seatbelts under different seating conditions.

[0050] It should be noted that in this embodiment, the preset angle is a pre-set seat back angle. When the preset angle is greater than the preset angle, the seat back angle is closer to a reclining posture. In some embodiments, the preset angle can be 115°-130°. Preferably, it can be 115°, 120°, 125°, or 130°. For example, when the seat back angle is greater than 120°, based on the connection between the first locking engagement 21 and the fixed locking fastener 30, it is necessary to control the lock head 1 to automatically rise and connect the second locking engagement 22 to the locking device 10 to prevent the hips from moving forward; when the seat back angle is less than or equal to 120°, only the first locking engagement 21 and the fixed locking fastener 30 can be connected, and a three-point seat belt system can be used.

[0051] This application integrates the locking device with a controller, occupant detection sensor, and seat angle sensor, enabling the locking device to automatically extend, retract, and raise / lower. As the occupant adjusts the seat between a sitting and reclining position, the controller automatically extends or retracts the locking device, allowing the seatbelt to switch between a standard three-point and four-point harness.

[0052] The lock head of the retractable locking device can be set in the front of the middle of the seat cushion. An additional locking point is added in the middle of the seat cushion, located between the occupant's two thighs. The second locking fitting is connected to the locking device, and the seat belt changes from a regular three-point belt to a four-point belt. This provides a safety restraint effect to prevent forward hip movement during dynamic collisions and reclining positions, offering better protection for the occupant without affecting the seat's aesthetics or seating comfort.

[0053] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A retractable locking device for seat belts, characterized in that, The locking device (10) includes a lock head (1), a traction member (2) and a winding mechanism (3). The winding mechanism (3) includes a rotating shaft (31) and a spiral guide (32) disposed outside the rotating shaft (31). One end of the traction member (2) is connected to the lock head (1), and the other end of the traction member (2) is fixedly connected to the rotating shaft (31). The rotating shaft (31) is used to rotate and drive the traction member (2) to move along the spiral guide (32) so as to drive the lock head (1) to extend and retract. The spiral guide (32) is a guide groove or guide cavity spirally arranged on the outside of the rotating shaft (31); the locking device (10) includes a fixed base (4), and a guide rail (41) is provided on the fixed base (4). The guide rail (41) is connected to the spiral guide (32) to form the moving path of the traction member (2). The guide rail (41) is an arc-shaped groove or an arc-shaped guide cavity.

2. The retractable locking device for a seat belt according to claim 1, characterized in that, The locking device (10) includes a telescopic sleeve (5) and a lock head support (6). The lock head support (6) is connected to the lock head (1). The lock head support (6), the telescopic sleeve (5), and the fixed base (4) are connected in sequence.

3. A retractable locking device for a seat belt according to claim 1, characterized in that, The locking device (10) includes a drive motor (7), the output end of which is connected to the rotating shaft (31) for transmission.

4. A retractable locking device for a seat belt according to claim 1, characterized in that, The traction component (2) is a wire rope or chain.

5. A seatbelt system, characterized in that, Includes seat belt (20), fixing fastener (30), locking device (10), controller, occupant detection sensor and seat angle sensor; The locking device (10) includes a lock head (1), a traction member (2), and a winding mechanism (3); the winding mechanism (3) includes a rotating shaft (31) and a spiral guide (32) disposed outside the rotating shaft (31). One end of the traction member (2) is connected to the lock head (1), and the other end of the traction member (2) is fixedly connected to the rotating shaft (31). The rotating shaft (31) is used to rotate and drive the traction member (2) to move along the spiral guide (32) so as to drive the lock head (1) to extend and retract. The spiral guide (32) is a guide groove or guide cavity spirally arranged on the outside of the rotating shaft (31); the locking device (10) includes a fixed base (4), and a guide rail (41) is provided on the fixed base (4). The guide rail (41) is connected to the spiral guide (32) to form the moving path of the traction member (2). The guide rail (41) is an arc-shaped groove or an arc-shaped guide cavity; The two ends of the seat belt (20) are fixed to one side of the seat (40), and the fixing fastener (30) is fixed to the other side of the seat (40); the locking device (10) is connected to the seat (40), and the lock head (1) of the locking device (10) is located at the front of the seat cushion (50); The seat belt is provided with a first locking fitting (21) and a second locking fitting (22). The first locking fitting (21) can be connected to the fixed locking device (30), and the second locking fitting (22) can be connected to the locking device (10). The occupant detection sensor is used to detect the occupancy status of the seat; The seat angle sensor is used to detect the seat back angle; The controller is used to receive detection signals from the occupant detection sensor and the seat angle sensor, and to control the extension and retraction of the locking device (10) according to the detection signals.

6. A seatbelt system according to claim 5, characterized in that, Includes a controller for controlling the telescopic movement of the locking device (10).

7. A vehicle, characterized in that, Includes the seat belt system as described in any one of claims 5 and 6.

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