JPS6129557Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a passive seat belt device in which a seat belt automatically operates in response to opening and closing of a door in a vehicle, etc., and fastens and releases the seat belt regardless of the intention of the occupant. It is something.

A passive seatbelt device normally has a guide rail on the side rail of the vehicle body that guides the seatbelt from the release position at the front to the fastening position at the rear, and is driven by a drive source such as a motor that is activated by opening and closing the door in the forward and reverse directions. When the door is open, the seat belt is held at the front end of the guide rail, allowing the occupant to get on and off freely; when the door is closed, the seat belt is guided by the rear end of the guide rail, and the seat belt is held at the front end of the guide rail, allowing the occupant to get in and out of the vehicle freely. Normally, it is adapted to fit the body of the person.

The present invention improves the configuration of the guide mechanism that guides the seat belt in the longitudinal direction as described above, thereby increasing the amount of guide movement of the seat belt in the longitudinal direction relative to the limited length of the guide rail. The opening area for the passenger to get on and off is made large especially when the seatbelt is guided and held forward and the seatbelt is released, thereby improving the ease of getting on and off the seat.The embodiments shown in the accompanying drawings will be described below.

In the figure, reference numeral 1 denotes a seat belt. Although not shown, one end of the belt is connected to a vehicle body member (for example, the floor or a member fixed to the floor) under the center side of the seat, and the other end is a seat belt that straddles the seat. The retractor 2 is connected to the side rail 3 of the vehicle body via the retractor 2.

The retractor 2 used is one with an emergency lock.

A guide rail 4 is attached to the side rail 3 in the front-rear direction, and a moving member 5 such as a slider or roller that moves while being guided by the guide rail 4 is fitted into the guide rail 4. Moving member 5
An arm 6 is provided at its lower end with a through hole 7 through which the seat belt 1 is inserted and guided. The guide member 5 and the arm 6 may be constructed integrally or, as shown in the figure, may be constructed separately and connected by bolts or the like.

A cover 6a made of synthetic resin or the like is attached to the surface of the arm 6.

One end of a cable 8 such as a gold wire is fixed to the movable member 5, and the movable member 5 is driven by a drive source 9 such as an electric motor that rotates forward and backward in response to opening and closing of the door.
is controlled to move back and forth within the guide rail 4 via a cable 8.

The guide rail 4 is configured such that its front and rear ends are curved upward at a predetermined radius to form curved portions 4a and 4b.

In the above configuration, when the door is opened from the seatbelt fastened state where the moving member 5 is located at the rear end of the guide rail 4 as shown by the solid line in FIG. is pulled forward. Then, the through hole 7 at the tip of the arm 6 moves forward and pulls out the seat belt 1 from the retractor 2, as shown by the chain line in FIG.
The seatbelt is released and supported forward, allowing the occupant to get in and out of the vehicle freely.

At this time, since an upwardly curved curved section 4a is formed at the front end of the guide rail 4, the movable member 5 and the arm 6 rotate forward at the curved section 4a, and this rotation causes the seat belt to The support point by the through hole 7 of No. 1 is located further forward by α than the drive amount l of the movable member 5, so that the area for getting on and off the passenger can be increased accordingly, and the ease of getting on and off the vehicle can be significantly improved.

When the occupant sits down in the seatbelt and closes the door, the drive source 9 rotates in the opposite direction to the above to let out the cable 8, and the cable 8 or the seatbelt 1 is wound by the retractor 2. Due to the retracting force (the retractor 2 is always urged by a spring in the direction of retracting the seatbelt), the movable member 5 moves backward within the guide rail 4, and the seatbelt is fastened as shown by the solid line in FIG. However, at this time, the movable member 5 and the arm 6 are rotated rearward due to the rear curved portion 4b, and the through 7
The seatbelt support point is located at the rear of the drive amount l by β, and the arm 6 and the through hole 7 are located at the rear of the door glass, for example at the center pillar, so these members do not obstruct the occupant's side visibility. Not only is there no seatbelt 1 due to through 7
The insertion and support of the seat belt 1 in the fastened state is performed in a substantially natural state, and the seat belt can be supported by the retractor 2 without almost any load applied to the through 7.

As described above, according to the present invention, with a simple configuration in which the front part of the guide rail that guides the movable member is curved upward, the amount of forward guidance of the seatbelt is reduced relative to the amount of drive of the movable member when the movable member moves forward. This makes it possible to significantly improve the ease of getting on and off the vehicle.

Moreover, by adopting a configuration in which the rear end of the guide rail is also curved upward, the amount of rearward movement of the seatbelt guide members such as the arm and the through can be made larger than the amount of movement of the moving member, and when the seatbelt is fastened. It is of great practical value as it improves side visibility and allows ideal seatbelt fastening conditions.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention, FIG. 2 is a detailed view of the main part of FIG. 1, and FIG. 3 is a sectional view of the main part of FIG. 2. 1... seat belt, 2... retractor, 3...
...Side rail, 4...Guide rail, 4a, 4b
...Curved portion, 5...Moving member, 6...Arm, 7
...Through, 8...Cable, 9...Drive source.

Claims (1)

[Scope of claim for utility model registration] (1) A guide rail is provided on the side rail of the vehicle body in the longitudinal direction, and as the door opens and closes, the seat belt is moved along the guide rail to the front seat belt release position and the rear seat belt release position. In a passive seat belt device that is activated to the fastened position,
A moving member fitted to the guide rail so as to move forward and backward as the door is opened and closed is provided with an arm extending downward, and a through hole for inserting and guiding a seat belt is provided at the lower end of the arm. A passive seat belt device characterized in that a curved portion that curves upward is formed at the front end of the rail. (2) The passive seat belt device according to claim 1, wherein the guide rail has an upwardly curved curved portion formed at its rear end.