JPH0738024Y2 - Seat belt shoulder position adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Use) The present invention relates to a shoulder position adjusting device for a seat belt, for example.

(Prior Art) As a conventional seat belt shoulder position adjusting device, for example, there is a three-point type device used for a front seat of a vehicle shown in FIGS. 3 to 5. In the figure, the through anchor 101 that supports the shoulder portion of the webbing 100.
Are movable up and down with respect to the center pillar 103. A guide rail 105 is provided on the center pillar 103 along the vertical direction of the center pillar 103.

The guide rail 105 is provided with a linear lead screw 107 along the vertical direction, one end of the lead screw 107 is connected to the drive motor / gear unit 109, and the other end is rotatably supported by the guide rail 105. There is.

The through anchor 101 is attached to a guide block 111, and the guide block 111 can move up and down linearly along a guide rail 105. The main body 113 of the guide block 111 is formed with a recess 113a extending in a direction orthogonal to the axial direction of the lead screw 107, and a screw nut 115 is integrally engaged with the recess 113a. The screw nut 115 is screwed onto the lead screw 107, and by driving the drive motor / gear unit 109, the screw nut 115 is moved up and down by the rotation of the lead screw 107.

Then, by driving the drive motor / gear unit 109, the through anchor 101 moves up and down via the screw nut 115 and the guide block 111, and the seat belt shoulder position is automatically adjusted to an optimum position according to the seat height of the occupant. It can be adjusted to prevent shoulder slippage and neck hanging.

(See Japanese Utility Model Publication No. 61-20452).

(Problems to be Solved by the Invention) In such a conventional device, while the center pillar 103 has a predetermined curvature in the vehicle width direction as a whole, the guide rail 105 has It is straight. Therefore, the center pillar inner 103a is connected to the guide rail 10
The width of the center pillar 103 (dimension D in FIG. 4) had to be increased substantially linearly along the straight line 5.

For this reason, the vehicle body shape is restricted by the vehicle width dimension, so that not only the vehicle interior space is restricted, but also there is a limit in securing a sufficient visual field for the rear occupants. Also,
If the width dimension of the center pillar 103 becomes large, it will not look good.

This invention was made in view of the above-mentioned problems, and while the shoulder position can be automatically adjusted, a large vehicle interior space can be secured and the side field of view can be improved to improve the appearance. An object of the present invention is to provide a seat belt shoulder position adjusting device that can be used.

[Structure of the Invention] (Means for Solving the Problem) In order to achieve the above object, the present invention is provided along the vertical direction of a center pillar inner formed uniformly with a predetermined curvature in the vertical direction, and A guide rail formed to have a curvature substantially the same as that of the center pillar inner, a linear lead screw provided along the up-down direction of the guide rail, and a drive motor for rotating the lead screw in the forward and reverse directions. A moving element that is screwed into the lead screw and moves up and down by forward and reverse rotation of the lead screw; and a moving element that is vertically movable along the guide rail and that locks the moving element in the vertical direction and And a guide block in which a through anchor of the seat belt is attached to the inside of the room (action) When the drive motor is driven to drive, the lead screw rotates and the mover moves up and down, so that the guide block to which the through anchor of the seat belt is attached relatively moves in the direction intersecting the moving direction of the mover and has a curvature. Move up and down along the rail.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIGS. 1 and 2 show a three-point type seat belt shoulder position adjusting device used for a front seat of a vehicle according to an embodiment of the present invention.

First, the structure will be described. The through anchor 3 for supporting the shoulder portion of the webbing 1 is vertically movable with respect to a center pillar 5 extending in the vertical direction of the vehicle body. The center pillar 5 is composed of a center pillar outer 5a and a center pillar inner 5b to form a closed cross section, and has a predetermined curvature R1 in the left-right direction of the vehicle body in order to suppress deformation of the vehicle body during rollover and ensure durability. ing.

In the closed cross section of the center pillar 5, a guide rail 7 having a substantially U-shaped cross section is attached along the vertical direction. Brackets 8 and 8 are fixed to the guide rail outer 5a from the upper and lower ends on the outer side in the vehicle width direction, and brackets 10 and 10 for mounting are welded to the center pillar outer 5a at positions corresponding to the brackets 8 and 8. It is fixed by. Bracket 10,
Weld nut 12 is fixed to 10 and fastening bolts 14 and 1
4 penetrates the brackets 8 and 8 and is screwed to the weld nut 12. As a result, the guide rail 7 is attached to the center pillar outer 5a.

The guide rail 7 has a curvature R2 that is substantially the same as the curvature R1 of the center pillar 5 in the left-right direction of the vehicle body. The guide rail 7 is provided with a linear lead screw 9 inside, one end of the lead screw 9 is connected to a drive motor / gear unit 11 provided at an upper portion of the guide rail 7, and the other end is provided at a lower portion of the guide rail 7. It is rotatably attached to the bearing 13. In the middle part of such a lead screw 9,
For example, a cylindrical screw nut 15 is screwed as a moving element that moves up and down by the forward and reverse rotations of the lead screw 9.

A guide block 17 is vertically movably engaged with the guide rail 7, and the guide block 17 is movably engaged with the screw nut 15 in the vertical direction. The screw nut 15 and the guide block 17 are relatively movable in the vehicle width direction A, which is a direction intersecting the moving direction of the screw nut 15, that is, the direction intersecting the vertical direction B, as described later. The guide block 17 includes a guide block body 19 and a cover portion 21.
It consists of two bodies. Therefore, the guide block 17 can be easily attached. Engagement portions 23 and 25 are provided at both edges of the guide block body 19 and the cover portion 21 in the vehicle body front-rear direction so as to extend in the up-down direction, and the engagement portion 23 of the body 19 is arranged in the vehicle width direction of the guide rail 7. The engagement portion 25 of the cover portion 21 is engaged with the outer edge 7a, and is engaged with the inner side surface 7b of the guide rail 7.

It should be noted that stopper portions 26 and 28 for restricting the uppermost position or the lowermost position of the vertical movement of the guide block 17 are formed from the upper end and the lower end of the guide rail 7, respectively.

A recess 27 for inserting the lead screw 9 is formed in the guide block main body 19 so as to be long in the vertical direction, and the rotation of the screw nut 15 is restricted in the middle portion thereof to regulate the screw nut 15.
A recess 29 is formed for relative movement in the vehicle width direction A with respect to 15.

Through anchor 3 is a guide block with anchor bolt 30.
It is attached to 17. A vertical guide 32 is formed on the center pillar inner 5b, a convex portion 31 protruding from the slit 7c of the guide rail 7 is formed on the guide block main body 19, and the cover portion 21 is located inside the passenger compartment from the guide hole 32. An embossed portion 33 is formed so as to slightly project and come into contact with the convex portion 31. A screw hole 35 is formed in the convex portion 31 of the main body 19, and the cover portion
A through hole 37 is formed in the embossed portion 33 of 21. A through hole 39 having a diameter larger than that of the anchor bolt 30 is formed in the through anchor 3. Then, the anchor bolt 30 penetrates the through hole 39 of the through anchor 3 and the through hole 37 of the cover 21, and the main body 19
The screw holes 35 are screwed together.

Next, the operation will be described.

In the above structure, when the drive motor 11 is driven to rotate the lead screw 9, the screw nut 15 is restricted in rotation by the recess 29 of the guide block 17 and moves up and down, so that the guide block 17 moves relative to the screw nut 15. Width direction (arrow A
In the vertical direction (arrow B direction) while moving relative to each other, and moves up and down along the guide rail 7 having a curvature. As a result, the through anchor 3 moves up and down, and the webbing 1 can be hung at the optimum position according to the seat height of the occupant, so that the shoulder disengagement, the neck hang, and the like can be suppressed.

Further, since the through anchor 3 is mounted on the embossed portion 33 slightly projecting to the inside of the vehicle from the guide hole 32, even if the guide rail inner 5b has the curvature R1, the webbing 1
Can be suppressed from interfering with the edge portion of the guide hole 32 of the guide rail inner 5b, and damage can be suppressed.
Moreover, in the through anchor 3, since the webbing insertion hole 1a is formed to be bent toward the vehicle interior side, the interference between the webbing 1 and the edge portion can be further suppressed.

In this embodiment, although the shoulder position of the webbing 1 can be automatically adjusted by driving the drive motor 11, the guide rail 7 has a curvature substantially the same as that of the center pillar 5, so that The width dimension can be reduced and a large vehicle interior space can be secured. Further, since the width dimension of the center pillar 5 can be reduced, not only the side field of view can be improved but also the appearance can be improved.

[Advantages of the Invention] As described above, according to the present invention, the guide rail on which the guide block to which the through anchor of the seat belt is attached is movably supported is configured to have a curvature substantially the same as the curvature of the center pillar. did. Therefore, while the shoulder belt position of the seat belt can be automatically adjusted, the width of the center pillar can be reduced and a large passenger compartment space can be secured, and not only the side field of view is improved but also the appearance is improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a seat belt shoulder position adjusting device according to an embodiment of the present invention, FIG. 2 is a perspective view of a guide block of FIG. 1, and FIG. 3 is a perspective view of a shoulder adjusting device according to a conventional example. Fig. 4 is a sectional view taken along line IV-IV of Fig. 3,
FIG. 5 is an overall perspective view of a conventional example. 3 …… Through anchor 5 …… Center pillar 7 …… Guide rail 9 …… Lead screw 11 …… Drive motor / gear unit 15 …… Screw nut (mover) 17 …… Guide block

Claims (1)

[Scope of utility model registration request] 1. A guide rail which is provided along a vertical direction of a center pillar inner uniformly formed with a predetermined curvature in the vertical direction and has a curvature substantially the same as that of the center pillar inner, and this guide. A linear lead screw provided along the vertical direction of the rail, a drive motor for rotating the lead screw in the forward and reverse directions, and a mover that is screwed into the lead screw and moves up and down by the forward and reverse rotation of the lead screw. And the movable body is vertically movable along the guide rails, the movable elements are vertically locked with each other, and the movable body is relatively movable in the vehicle width direction. A seatbelt shoulder position adjusting device comprising a guide block to which a through anchor is attached.