SEAT BELT SUPPORT POINTS FORWARD AND BACKWARD ADJUSTMENT STRUCTURE

Abstract

A safety belt lower anchorage front-back adjustment structure may have a bottom base and a seat frame that is mounted on the bottom base. A support base may be respectively mounted on the bottom base at positions corresponding to a left side and a right side of the seat frame. A sliding component may be provided on each the support base. Two of the sliding components may be able to slide forward and backward on the corresponding support base. A driving assembly may be provided between the sliding component and the corresponding support base used for driving the sliding component to slide forward and backward among the two sliding components. A buckle may be fixedly mounted on one sliding component, and a lower anchor is fixedly mounted on the other sliding component.

Claims

1-10. (canceled)

11. A safety belt lower anchorage front-back adjustment structure, comprising: a bottom base and a seat frame that is mounted on the bottom base, a support base being respectively mounted on the bottom base at positions corresponding to a left side and a right side of the seat frame, a sliding component being provided on each said support base, two said sliding components being able to slide forward and backward on the corresponding support base, and a driving assembly being provided between the sliding component and the corresponding support base, used for driving the sliding component to slide forward and backward; among two said sliding components, a buckle is fixedly mounted on one sliding component, and a lower anchor is fixedly mounted on the other sliding component.

12. The safety belt lower anchorage front-back adjustment structure as claimed in claim 11, wherein: the support base comprises an inner support base and an outer support base that is fixedly mounted to an outer side of the inner support base by means of a screw, the inner support base being fixedly fitted to a side part of the bottom base.

13. The safety belt lower anchorage front-back adjustment structure as claimed in claim 12, wherein: a front end and a back end of the outer support base are provided with an outwardly bent support plate, two guide rods being fixedly mounted between the support plates, a front end and a back end of the sliding component being provided with an inwardly extending assembly plate, and a sliding hole that slidably fits over the guide rod being provided on the assembly plate.

14. The safety belt lower anchorage front-back adjustment structure as claimed in claim 13, wherein: the driving assembly comprises an electric motor and a lead screw that is in motive power connection with an output shaft of the electric motor, the electric motor being fixedly fitted to an outer side of one of the support plates, and two ends of the lead screw being rotatably supported on two said support plates.

15. The safety belt lower anchorage front-back adjustment structure as claimed in claim 14, wherein: the electric motor is a reduction motor, and an upper end of the lead screw is in motive power connection with an output end of the electric motor.

16. The safety belt lower anchorage front-back adjustment structure as claimed in claim 13, wherein: a bushing is fitted in the sliding hole.

17. The safety belt lower anchorage front-back adjustment structure as claimed in claim 13, wherein: the sliding component is a linear sliding block.

18. The safety belt lower anchorage front-back adjustment structure as claimed in claim 11, wherein: the driving assembly comprises an electric motor and a synchronous belt, a synchronous wheel being fitted over an output end of the electric motor, a directional wheel being provided on the support base, the synchronous belt being fitted over the synchronous wheel and the directional wheel, and the sliding component being fixedly mounted to one side of the synchronous belt.

19. The safety belt lower anchorage front-back adjustment structure as claimed in claim 14, wherein: the bottom base is provided with an angle adjuster electric motor for adjusting a tilt angle thereof, and the angle adjuster electric motor and the electric motor are synchronously controlled by means of a controller.

20. The safety belt lower anchorage front-back adjustment structure as claimed in claim 14, wherein: the electric motor is a strip-shaped construction and is longitudinally mounted on an outer side of the support plate, a width of the electric motor not exceeding an outwardly bent length of the support plate.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG. 1 is a structural schematic drawing of a seat (only showing a seat frame portion);

[0022] FIG. 2 is a right view of the seat (with a backrest made invisible);

[0023] FIG. 3 is a partial schematic drawing of a safety belt lower anchorage (a lower anchor position);

[0024] FIG. 4 is a structural schematic drawing of the lower anchorage of the seat in a zero-gravity mode (a buckle component side);

[0025] FIG. 5 is a top view of a seat (a normal sitting posture mode);

[0026] FIG. 6 is a left view of a seat (a normal sitting posture mode);

[0027] FIG. 7 is a left view of a seat (a zero-gravity sitting posture mode);

[0028] FIG. 8 is a schematic drawing of a structure of another embodiment of a driving assembly 5.

DETAILED DESCRIPTION

[0029] The device and method are further explained below in conjunction with the embodiments and accompanying drawings.

[0030] FIG. 1 shows a safety belt lower anchorage front-back adjustment structure, the structure comprising a bottom base A, a seat frame B and two support bases 1, and a back end of the bottom base A and a back end of the seat frame B being rotatably mounted. In the present embodiment, the two support bases 1 are symmetrically mounted at a left side and a right side of the bottom base A, and the safety belt lower anchorage front-back adjustment structure further comprises two sliding components 2. The two sliding components 2 are slidably mounted on the left and right support bases 1 in one-to-one correspondence in a front-back direction of the bottom base A. A buckle 3 and a lower anchor 4 are respectively fixedly provided on outer sides of the left and right sliding components 2. The buckle 3 is used for locking a safety belt. The lower anchor 4 is used for cooperating with the buckle 3 to restrain the waist of an occupant. A driving assembly 5 is mounted between the support base 1 and the sliding component 2. The driving assembly 5 being used for driving the sliding component 2 to move forward and backward. With such a design, front-back motion of the sliding components 2 achieves front-back adjustability of the safety belt lower anchorage. Such a structure has the advantages of structural simplicity and high reliability, and can adapt to groups with different body types, ensuring wearing comfort of the safety belt, and, when the seat performs multi-angle adjustment, the front-back adjustment of the safety belt lower anchorage can also ensure the safety belt always has a restraining effect on the occupant.

[0031] Further in conjunction with FIGS. 2, 3 and 4, in the present embodiment, the support base 1 comprises an inner support base 1a and an outer support base 1b. The inner support bases 1a are fixedly mounted to a left side and a right side of the bottom base A by means of bolts. Mounting positions of the left and right inner support bases 1a are symmetrical in a front-back direction of the bottom base A. The outer support base 1b are fixedly mounted to an outer side of the inner support base 1a by means of a bolt. A front end and a back end of the outer support base 1b are provided with an outwardly bent support plate 1b1, such that the outer support base 1b is overall a U-shaped structure. The two guide rods 1c are fixedly mounted between the front and back support plates 1b1. A front end and a back end of the sliding component 2 being provided with an assembly plate 2a that extends toward the bottom base A. A sliding hole 2b is provided on the assembly plate 2a. A bushing 2c is fitted in the sliding hole 2b. The sliding component 2 is slidably fitted over the guide rod 1c by means of the bushing 2c. With such a design, the sliding component 2 can be firmly fitted over the guide rod 1c, and the bushing 2c is used to make the sliding component 2 slide more smoothly.

[0032] Furthermore, in the present embodiment, the driving assembly 5 is composed of an electric motor 5a and a lead screw 5b that is in motive power connection with an output shaft of the electric motor 5a, the electric motor 5a being a strip-shaped reduction motor, the electric motor 5a being longitudinally fixedly mounted to an outer side of one of the support plates 1b1 of the outer support base 1b by means of a bolt. A width of the electric motor 5a does not exceed an outwardly bent length of the support plate 1b1. A front end and a back end of the lead screw 5b are rotatably supported between front and back support plates 1b1. One end of the lead screw 5b is in motive power connection with the output shaft of the electric motor 5a. The sliding component 2 is mounted to the lead screw 5b in a threaded manner. By means of programming, the left and right electric motors 5a and a seat angle adjuster electric motor perform synchronous adjustment using the same controller. With such a design, the operation of the electric motors 5a causes the lead screws 5b to rotate, and with the lead screws 5b fitted to the sliding components 2 in a threaded manner, the rotation of the lead screws 5b enables the sliding components 2 to move forward and backward, thereby achieving front-back adjustability of the safety belt lower anchorage (a buckle 3 and a lower anchor 4), and, while the seat angle adjuster electric motor operates, the electric motors 5a also operate, realizing synchronous adjustment of a seat angle with the safety belt buckle, and the longitudinal mounting of the electric motors 5a also does not increase the overall volume of the seat.

[0033] FIG. 5 shows a top view of the present utility model mounted on a seat, the buckle 3 and the lower anchor 4 being symmetrically mounted to the left side and the right side of the bottom base A, and an overall width of the driving assembly 5 not exceeding a width of the buckle 3 or the lower anchor 4 that rotates hidden in the sliding component 2. With such a design, the symmetrical mounting ensures that the safety belt and the waist position of the occupant are in a parallel state, which can restrain the occupant to a maximum extent, and the overall mounting structure also does not increase the space occupied by the seat, and the overall lower anchorage occupies a small proportion of the space.

[0034] FIGS. 6 and 7 respectively show positions of the lower anchorage of the seat in a conventional mode and a zero-gravity mode, wherein only the positions of the buckle 3 in the different modes are shown because the buckle 3 and the lower anchor 4 are symmetrically mounted in a left-right direction. In the present embodiment, the electric motors 5a and the angle adjuster electric motor of the seat are synchronously controlled by means of a controller, so that the lower anchorage also moves forward as the angle of the seat frame B of the seat is increased. With such a design, the safety belt lower anchorage can also self-adaptively adjust when the seat switches between multiple modes.

[0035] As shown in FIG. 8, in addition to the lead screw and electric motor driving means above, the driving assembly 5 may further be composed of an electric motor 5a and a synchronous belt 5c. A synchronous wheel 5d is fitted over an output end of the electric motor 5a. A directional wheel 1d is fixedly mounted on the support base 1. The synchronous belt 5c is fitted over the synchronous wheel 5d and the directional wheel 1d. The sliding component 2 is fixedly mounted on top of the synchronous belt. With such a design, the operation of the electric motors 5a drives the synchronous belts 4c to rotate by means of rotation of the synchronous wheels 5d, and the rotation of the synchronous belts 4c drives front-back motion of the sliding components 2, thereby achieving front-back adjustment of the safety belt lower anchorage (the buckle 3 and the lower anchor 4).

[0036] Finally, it must be explained that the above merely describes preferred embodiments; a person skilled in the art, having been enlightened by the foregoing may make various similar representations without going against the purpose of the present disclosure and the claims, all such changes falling within the scope of protection the claims.