CN115257622A - Telescopic locking device for safety belt, safety belt system and vehicle - Google Patents

Abstract

The invention discloses a telescopic locking device for a safety belt, the safety belt system and a vehicle. The locking device can automatically stretch and retract, and the lock head of the locking device is arranged at the front part of the cushion and is more flexible. The second locking fitting piece is connected with the locking device, so that the safety belt can be changed from a common three-point mode to a four-point mode, and the safety restraint effect of preventing the hip from moving forwards in dynamic collision and lying positions is achieved.

Description

Telescopic locking device for safety belt, safety belt system and vehicle

Technical Field

The invention relates to the technical field of automobile parts, in particular to a telescopic locking device for a safety belt, the safety belt system and a vehicle.

Background

At present, the new concept of vehicle design is infinite, and the safety belt system is very important to protect human bodies when traffic accidents happen. The existing locking device of the common three-point safety belt is positioned on the side surface of a seat, so that when a collision happens, a passenger can be effectively restrained from moving under the condition of normal sitting posture, and the protection effect is achieved. However, when the seat is adjusted to the lying position and the seat collides, the ordinary three-point safety belt cannot effectively restrain the hip of the passenger from moving forward and cannot achieve the safety restraint effect. And the existing locking device has fixed position, poor flexibility of the lock head and can not be adjusted. When the locking points are additionally arranged at other positions of the seat, the locking device occupies a larger space, and the comfort and the attractiveness of the seat are affected. It is therefore desirable to provide a seat belt system having an adjustable locking mechanism that increases the flexibility of the locking head while effectively restraining the hip of the occupant from moving forward when the seat is adjusted to the reclined position.

Disclosure of Invention

The safety restraint device aims to solve the problems that in the prior art, a locking device cannot be adjusted, and a common three-point safety belt cannot effectively restrain hip forward movement of a passenger and cannot achieve a safety restraint effect.

The application provides a scalable locking device for safety belt, locking device includes the tapered end, draws piece and winding mechanism, winding mechanism includes the pivot and sets up the spiral guide spare in the pivot outside, draw a one end with the tapered end is connected, draw the other end of piece with pivot fixed connection, the pivot is used for rotatory drive draw the piece to follow spiral guide spare removes.

Furthermore, the locking device comprises a fixed base, a guide rail is arranged on the fixed base, and the guide rail is connected with the spiral guide piece.

Further, the guide rail is an arc-shaped groove.

Furthermore, the locking device comprises a telescopic sheath and a lock head supporting piece, the lock head supporting piece is connected with the lock head, and the lock head supporting piece, the telescopic sheath and the fixed base are sequentially connected.

Furthermore, the locking device comprises a driving motor, and an output end of the driving motor is in transmission connection with the rotating shaft.

Further, the traction piece is a steel wire rope or a chain.

The application also provides a safety belt system, which comprises a safety belt, a fixed locking piece and the telescopic locking device, wherein two ends of the safety belt are fixed on one side of a seat, and the fixed locking piece is fixed on the other side of the seat; the locking device is connected with the seat, and a lock head of the locking device is arranged at the front part of the cushion;

the safety belt is provided with a first locking fitting piece and a second locking fitting piece, the first locking fitting piece can be connected with the fixed locking piece, and the second locking fitting piece can be connected with the locking device.

Further, the locking device comprises a controller, wherein the controller is used for controlling the telescopic motion of the locking device.

Further, an occupant detection sensor and a seat angle sensor are included;

the passenger detection sensor is used for detecting the passenger occupation condition of the seat;

the seat angle sensor is used for detecting the angle of the backrest of the seat;

the controller is used for receiving detection signals of the passenger detection sensor and the seat angle sensor and controlling the lock head to stretch according to the detection signals.

The application also provides a vehicle comprising the seat belt system.

The embodiment of the invention has the following beneficial effects:

(1) The lock head of the telescopic locking device can move telescopically, the rotating shaft of the winding mechanism rotates to drive the traction piece to move along the spiral guide piece, and then the lock head can be driven to move telescopically, so that the flexibility of the lock head is increased; the moving path of the traction piece is spiral, so that the occupied space of the locking device can be effectively reduced.

(2) The lock head of the telescopic locking device is arranged at the position, close to the front, in the middle of the cushion, the locking point is additionally arranged in the middle of the cushion, the locking point is positioned between thighs of a passenger, the second locking fitting piece is connected with the locking device, and the safety belt is changed from three points to four points, so that the safety restraint effect of preventing the hip from moving forwards in dynamic collision and lying positions is achieved.

(3) The locking device is combined with the controller, the passenger detection sensor and the seat angle sensor, so that the locking device has an automatic telescopic lifting function. When the passenger adjusts the seat between the sitting position and the lying position, the locking device is controlled to automatically stretch, and the safety belt can be converted between the common three-point mode and the common four-point mode.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the embodiment or the description of the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural diagram of a retractable locking device for a seat belt according to an embodiment of the present invention;

FIG. 2 is an exploded view of a locking device according to an embodiment of the present invention;

FIG. 3 is a schematic illustration of a seat belt system according to an embodiment of the present invention;

FIG. 4 illustrates the wearing process of the three-point seat belt system according to an embodiment of the present invention;

FIG. 5 is a wear sequence for a four-point seat belt system in accordance with an embodiment of the present invention;

fig. 6 is a flow chart illustrating the conversion of a four-point seat belt system to a three-point seat belt system in accordance with an embodiment of the present invention.

Wherein the reference numerals in the figures correspond to: 10-locking device, 20-safety belt, 21-first locking fitting element, 22-second locking fitting element, 30-fixed lock, 40-seat, 50-cushion, 1-liftable lock, 2-traction element, 3-winding mechanism, 31-rotating shaft, 311-driven gear, 32-spiral guide, 4-fixed base, 41-guide groove, 5-telescopic sheath, 6-lock support, 7-driving motor, 71-driving gear.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and operate, and thus should not be construed as limiting the present invention. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In addition, in the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Examples

As shown in fig. 1 and 2, the present embodiment provides a retractable locking device for a safety belt, the locking device 10 includes a lock head 1, a pulling 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 pulling member 2 is connected to the lock head 1, the other end of the pulling member 2 is fixedly connected to the rotating shaft 31, and the rotating shaft 31 is configured to rotate to drive the pulling member 2 to move along the spiral guide 32.

In this embodiment, the lock head 1 of the locking device 10 can move telescopically, the rotating shaft 31 of the winding mechanism 3 rotates to drive the traction member 2 to move along the spiral guide member 32, and thus the lock head 1 can be driven to move telescopically, and the flexibility of the lock head 1 is increased. The moving path of the traction piece 2 is spiral, and the spiral winding type recovery of the traction piece 2 can effectively reduce the space required by movement, thereby reducing the occupied space of the locking device 10.

In particular, the traction element 2 may be a wire rope or a chain. Preferably, it may be a steel cord that is easy to wind while having a certain rigidity. The spiral guide 32 is a guide groove or a guide chamber spirally disposed outside the rotary shaft 31.

Specifically, the locking device 10 includes a fixed base 4, and a guide rail 41 is disposed on the fixed base 4, and the guide rail 41 is connected to the spiral guide 32. The guide rail 41 may be an arc-shaped groove or an arc-shaped guide cavity. The arc-shaped guide rail 41 is connected with the spiral guide 32 to form a complete traction member moving path. The provision of the arcuate guide track 41 also reduces the space taken up by the towing member 2 to move and thus reduces the space taken up by the locking device 10. The stationary base 4 may be used to connect the locking device 10 with the vehicle floor while the guide rail 41 is connected with the spiral guide 32 for supporting and limiting the moving path of the traction member 2 so that the traction member 2 can smoothly move along the guide rail 41 and the spiral guide 32.

Specifically, locking device 10 includes flexible sheath 5 and tapered end support 6, and tapered end support 6 is connected with tapered end 1, and tapered end support 6, flexible sheath 5 and unable adjustment base 4 connect gradually. The lock support piece 6 is sleeved below the lock 1 and used for supporting and protecting the lock 1 and ensuring the appearance and the connection stability. The telescopic sheath 5 is arranged between the lock head support 6 and the fixed base 4. In this embodiment, the stretchable sheath 5 may be an elastic rubber stretchable sheath, or may be a sheath material such as a canvas stretchable sheath or a paper stretchable sheath having a stretchable property. The telescopic sheath 5 can protect the middle traction piece 2 from leakage when the lock head 1 is telescopic.

Specifically, the locking device 10 includes a driving motor 7, and an output end of the driving motor 7 is in transmission connection with the rotating shaft 31. In this embodiment, the output end of the driving motor 7 is provided with a driving gear 71, the rotating shaft 31 is provided with a driven gear 311, and the driving gear 71 is meshed with the driven gear 311 to transmit motor power.

In the locking device 10 of the present embodiment, the driving motor 7 drives the rotating shaft 311 to rotate, so as to drive the traction member 2 to move along the spiral guide member 32 and the guide rail 41, thereby pulling the lock head 1 to perform a telescopic motion. In some embodiments, the lock head 1 may be disposed under a leather sheath of the seat cushion. When tapered end 1 retracts and descends to the cushion below, the cushion leather sheath recovers the original shape, and the appearance and the riding comfort of the seat are not influenced.

As shown in fig. 3, the present embodiment also provides a seat belt system including a seat belt 20, a fixed locking member 30, and a retractable locking device 10. Both ends of the webbing 20 are fixed to one side of the seat 40. Specifically, one end of the safety belt is fixed on the seat backrest through a retractor, and the other end of the safety belt is fixed on the side edge or below the seat cushion. The fixing latch 30 is fixed to the other side of the seat 40. The lock device 10 is coupled to the seat 40, and the lock head 1 of the lock device 10 is disposed at the front of the seat cushion 50. Specifically, the seat cushion is divided into two parts in the transverse direction, wherein the front half part is the front part of the seat cushion. In the embodiment, the locking device 10 is connected with and fixed under the cushion 50, the lock head 1 is arranged in the middle of the front part of the cushion 50, and the lock head 1 can be lifted or lowered from the lower part of the leather sheath of the cushion. When the passenger sits down, the lock head 1 is positioned in the middle of the two legs of the passenger. In some embodiments, the surface of the cushion is designed with a leather sheath protective cover, when the lock head 1 retracts to descend below the cushion, the leather sheath protective cover returns to the original state, and the appearance of the seat and the riding comfort of passengers are not affected.

In particular, a first locking counterpart 21 and a second locking counterpart 22 are provided on the seat belt 20, the first locking counterpart 21 being connectable with the fixed locking element 30, and the second locking counterpart 22 being connectable with the locking device 10. It should be noted that, the first locking mating element 21 and the second locking mating element 22 of the present embodiment have different structural shapes, that is, the first locking mating element 21 cannot be inserted into the locking device 10 incorrectly, and the second locking mating element 22 cannot be inserted into the locking device 30 incorrectly, so that passengers can be prevented from inserting the locking device into the locking device 30 incorrectly.

Specifically, when the first locking engagement piece 21 is connected to the fixed locking member 30 and the second locking engagement piece 22 is connected to the locking device 10, a four-point seat belt system is formed. The lock head 1 of the locking device 10 is arranged at the front position of the middle part of the cushion. A locking point is additionally arranged in the middle of the seat cushion and is positioned between thighs of a passenger, and the second locking fitting piece is connected with the locking device, so that the safety belt is changed from a common three-point mode to a four-point mode, and the safety restraint effect of preventing the hip from moving forwards in dynamic collision is achieved. Especially, when the passenger is in a lying position, the passenger can be prevented from sliding forwards, and the dangerous situation that the restraint is invalid or the neck is tied by a safety belt due to displacement is avoided.

Specifically, the seat belt system of the present 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 may be controlled according to a simple manual press or a command from an electrical switch.

In some embodiments, the controller may be an automatic control unit, the seat belt system further comprising an occupant detection sensor and a seat angle sensor; the passenger detection sensor is used for detecting the passenger occupation condition of the seat; a seat angle sensor for detecting a seat back angle; and the controller is used for receiving detection signals of the passenger detection sensor and the seat angle sensor and controlling the extension and contraction of the lock head 1 of the locking device 10 according to the detection signals.

Specifically, fig. 4 shows a wearing procedure of the three-point seat belt system. When the controller receives a signal that the seat is occupied and the angle of the backrest of the seat is less than or equal to the preset angle, the passenger can complete wearing only by connecting the first locking fitting piece 21 with the fixed locking piece 30, so that a three-point safety belt system is formed;

fig. 5 shows a wearing procedure of the four-point seat belt system. When the controller receives a signal that the seat is occupied and the angle of the backrest of the seat is larger than a preset angle, the controller controls the lock head 1 below the seat cushion to lift on the basis that the first locking matching part 21 is connected with the fixed locking part 30, and at the moment, the second locking matching part 22 is connected with the locking device 10 to finish wearing to form a four-point type safety belt system;

fig. 6 illustrates the conversion of a four-point seat belt system to a three-point seat belt system. When the controller receives a signal that the seat is occupied and the angle of the backrest of the seat is less than or equal to the preset angle, the second locking fitting piece 22 is unlocked from the locking device 10, and the controller receives the unlocking signal and controls the lock head 1 of the locking device 10 to descend to be converted into a three-point safety belt system.

If the passenger has an unlocking requirement, the passenger only needs to unlock the first locking matching piece 21 and the fixed locking piece 30, and then the safety belt can be completely released; the design can complete the free switching of the three-point safety belt and the four-point safety belt under different seat working conditions.

It should be noted that, in the present embodiment, the preset angle is a seat back angle set in advance, and when the preset angle is larger than the preset angle, the seat back angle is closer to the lying position. In some embodiments, the preset angle may be 115-130 °. Preferably, it may be 115 °, 120 °, 125 ° or 130 °. For example, when the angle of the seat back is greater than 120 °, the lock head 1 needs to be controlled to automatically lift up based on the connection between the first locking fitting piece 21 and the fixed locking piece 30, and the second locking fitting piece 22 is connected to the locking device 10 to prevent the hip from moving forward; when the seat back angle is 120 ° or less, only the first locking fitting 21 may be connected to the fixed locking member 30, and a three-point seat belt system may be employed.

The locking device is combined with the controller, the passenger detection sensor and the seat angle sensor, so that the locking device has an automatic telescopic lifting function. When the passenger adjusts the seat between the sitting position and the lying position, the controller automatically controls the locking device to stretch, and the safety belt can be converted between the common three-point mode and the common four-point mode.

The lock head of the telescopic locking device can be arranged at the position close to the front of the middle part of the cushion, a locking point is additionally arranged in the middle of the cushion of the seat, the locking point is positioned between two thighs of a passenger, a second locking fitting piece is connected with the locking device, and the safety belt is changed from a common three-point mode to a four-point mode, so that the safety restraint effect of preventing the hip from moving forwards in dynamic collision and lying positions is met, the better protection effect is achieved for the passenger, the attractiveness of the seat is not influenced, and the riding comfort of the seat is not influenced.

The foregoing is a preferred embodiment of the present invention, and it should be noted that modifications and embellishments could be made by those skilled in the art without departing from the principle of the present invention, and these modifications and embellishments are also regarded as the scope of the present invention.

Claims (10)

1. The telescopic locking device for the safety belt is characterized in that the locking device (10) comprises a lock head (1), a traction piece (2) and a winding mechanism (3), the winding mechanism (3) comprises a rotating shaft (31) and a spiral guide piece (32) arranged on the outer side of the rotating shaft (31), one end of the traction piece (2) is connected with the lock head (1), the other end of the traction piece (2) is fixedly connected with the rotating shaft (31), and the rotating shaft (31) is used for driving the traction piece (2) to move along the spiral guide piece (32) in a rotating mode.

2. Telescopic locking device for safety belts according to claim 1, characterized in that the locking device (10) comprises a fixed base (4), on which fixed base (4) there are guide rails (41), said guide rails (41) being connected to the spiral guide (32).

3. Telescopic locking device for safety belts according to claim 2, characterized in that said guide rail (41) is an arc-shaped slot.

4. A telescopic locking device for safety belts according to claim 3, characterized in that the locking device (10) comprises a telescopic sheath (5) and a lock head support (6), the lock head support (6) being connected with the lock head (1), the lock head support (6), the telescopic sheath (5) and the fixed base (4) being connected in sequence.

5. Telescopic locking device for safety belts according to claim 1, characterized in that the locking device (10) comprises a drive motor (7), the output of the drive motor (7) being in driving connection with the rotating shaft (31).

6. The retractable locking device for a safety-belt according to claim 1, characterized in that the traction element (2) is a wire rope or a chain.

7. A safety belt system, characterized by comprising a safety belt (20), a fixed locking member (30) and a retractable locking device according to any one of claims 1-6, wherein both ends of the safety belt (20) are fixed to one side of a seat (40), and the fixed locking member (30) is fixed to the other side of the seat (40); the locking device (10) is connected with the seat (40), and a lock head (1) of the locking device (10) is arranged at the front part of a cushion (50);

the safety belt is provided with a first locking fitting piece (21) and a second locking fitting piece (22), the first locking fitting piece (21) can be connected with the fixed locking piece (30), and the second locking fitting piece (22) can be connected with the locking device (10).

8. A safety-belt system according to claim 7, characterized by a control for controlling the telescopic movement of the locking device (10).

9. A seat belt system according to claim 8, comprising an occupant detection sensor and a seat angle sensor;

the passenger detection sensor is used for detecting the passenger occupation condition of the seat;

the seat angle sensor is used for detecting the angle of the backrest of the seat;

the controller is used for receiving detection signals of the passenger detection sensor and the seat angle sensor and controlling the locking device (10) to stretch and retract according to the detection signals.

10. A vehicle, characterized in that it comprises a safety belt system according to any one of claims 7-9.

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