RU2241612C1 - Vehicle seat-rest fastener - Google Patents

Abstract

FIELD: automotive industry; vehicle seats.

SUBSTANCE: proposed headrest fastener contains headrest with pair of vertical posts installed in guides on seat backrest and connected in lower part by common crossmember. Said fastener has vertical displacement interlock mechanism. Guides are rigidly connected in upper part with bushings installed for turning on upper part of backrest framework and fixed from axial displacement by U-shaped stops secured on upper part of framework. Guides are installed for interaction with bridges of U-shaped stops. Moreover, device is furnished with spring members in form of zigzag springs whose upper ends are secured on common crossmember, and lower ones, on lower part of backrest framework.

EFFECT: improved safety at front collisions, provision of simple design and reliability.

4 cl, 3 dwg

Description

The invention relates to the field of automotive industry, in particular to the fastening of the headrests of vehicle seats.

The prior art design of the mounting of the head restraint of a vehicle seat with a locking device (see, for example, RF patent No. 218695, CL 60 N 2/48 of 08/02/2000), comprising a head restraint with a rod installed in a locking device, which is located in the seat back guide bush, the locking device includes a lever and an elastic locking element, the lever being made integral, the lower part of it is a plate with a through hole for the headrest rod, and the upper part is made in the form e staples, while one of the end sections of the upper part is fixed in the elastic blocking element.

In this design, the guide sleeve with the locking device is rigidly fixed to the backrest frame, and the headrest has only vertical adjustment. The design of the rigid fastening of the guide sleeve of the headrest prevents injury to the cervical vertebrae, but does not reduce the risk of traumatic effects on the cervical spine. It is also possible that traumatic brain injuries due to the large amplitude of the deviation of the human head back when it hits a rigidly fixed headrest.

The closest device of the same purpose to the claimed invention in terms of features is a device for attaching a head restraint of a vehicle seat (see application DE No. 4034120, CL 60 N 2/48 of 10/10/1991), containing a head restraint with a pair of uprights located in guides installed in a cavity located in the back of the seat and tapering downward, while the guide racks in their lower part are connected by a common axis, and guide inserts are installed in the upper wide part of the cavity, which determine the amount of inclination head, in the middle part of the cavity there are damping elements made in the form of inflatable chambers connected to an air compressor.

The known design of the active head restraint allows to obtain high damping properties and a large swing amplitude of the head restraint.

However, the use of an air compressor to adjust the elastic properties of the system leads to the following disadvantages: the design is difficult for practical use; compressed air must be supplied to the seatback; to place the elements of the mechanism requires an exact cavity inside the back; low reliability due to possible leaks in the compressed air supply system; tilting the headrest back can lead to an increase in the distance between the head and the surface of the headrest more than acceptable, which reduces the safety.

The technical result of the invention is to increase the safety in emergencies during a frontal impact of a vehicle of both a person sitting directly on the seat and a passenger sitting behind, ensuring simplicity and reliability of the structure.

The specified technical result in the implementation of the invention is achieved by the fact that the known mounting device for the head restraint of a vehicle seat, comprising a head restraint with a pair of vertical struts installed in rails located in the back of the seat and connected in its lower part by a common crossbar, is equipped with a locking mechanism against vertical movement, and said guides in their upper part are rigidly connected to bushings mounted for rotation on the upper part of the backrest frame and fixed with axial movement of the U-shaped stops fixed on the upper part of the frame, while the guides are installed with the possibility of interaction with the jumpers of the U-shaped stops, in addition, the device is equipped with spring elements, the upper ends of which are fixed on a common axis, and the lower ones on the lower part of the frame backs.

The locking mechanism against vertical movement is made in the form of transverse grooves on vertical racks and clamps mounted on vertical racks with the ability to move with them.

U-shaped stops are fixed on the upper part of the frame at an angle.

Spring elements are made in the form of zigzag springs "snakes".

Comparison of the claimed technical solution with the prior art in scientific, technical and patent documentation on the priority date in the main and related sections shows that the set of essential features of the claimed solution was not previously known, therefore, it meets the patentability condition of "novelty."

The proposed technical solution is industrially applicable, because can be manufactured industrially, efficiently, feasibly and reproducibly, therefore, meets the patentability condition "industrial applicability".

The invention is illustrated by drawings, where figure 1 shows a General view of the mounting device of the head restraint of the seat and the forces that drive it; figure 2 is a front view (without headrest); figure 3 is a side view (without headrest).

The device for attaching a head restraint of a vehicle seat includes a head restraint 1 with a pair of vertical struts 2 installed in guides 3 located in the backrest 4 of the seat. The backrest 4 of the seat has a frame 5 to which the device is attached, and is poured, for example, with polyurethane foam or other printed material to create a monolithic single structure.

The guides 3 are connected in their lower part by a common crossbeam 6, and in their upper part are rigidly connected to the bushings 7, mounted with the possibility of rotation on the upper part of the frame 5 of the backrest and fixed from axial movement by U-shaped stops 8, covering the bushings 5 at the ends, and fixed on the top of the frame 5.

The guides 3 are installed with the possibility of interaction with the jumper of the U-shaped stops 8. The limitation of the angle of inclination of the headrest 1 back (Fig. 1) is due to the contact of the cylindrical part of the guides 3 with the jumpers of the U-shaped stops 8.

U-shaped stops 8 allow you to set the angle of inclination of the entire head restraint 1 due to its spatial position, namely, rigid mounting on the frame 5 of the backrest at the required angle.

The device is equipped with spring elements, the upper ends of which are fixed on a common crossbar 6, and the lower ones on the lower part of the backrest frame 5. The spring elements are made in the form of zigzag springs 9 "snakes" of spring steel.

The device has a locking mechanism against vertical movement, made in the form of transverse grooves 10 on the uprights 2 and latches 11 mounted on the uprights 2 with the possibility of moving with them.

The operation of the device.

the inclination of the head restraint 1 forward occurs due to the pressing of the back of a person in the back of his seat or when a rear seat headrest 1 is hit in the front seat in an emergency.

The guides 3 of the head restraint 1, rigidly connected to the bushings 7, mounted with the possibility of rotation on the upper part of the backrest frame 5, enable it to be tilted forward at the time of the accident.

The working position of the headrest 1 and its blocking from tilting back is determined by the position of the U-shaped stops 8, mounted on the upper part of the frame 5.

The inclination of the headrest 1 is elastic and is ensured by zigzag springs 8 "snakes". The springs 9 elastically connect to each other the common crossbar 6 of the guides 3 with the lower part of the backrest frame 5.

The magnitude of the elastic tilt of the headrest 1 forward and the force required for this is determined by the properties of the springs 9 and the magnitude of their preliminary tension.

The preliminary tension of the springs 8 can be created by reducing their length or lifting the crossbar 6

The simultaneous operation of the springs 8 and the stuffing material of the backrest 4 gives the backrest the necessary bearing capacity.

The elastic characteristic of the system, together with the elastic characteristics of head restraint 1, meets the requirements of UNECE Regulation No. 25 with regard to energy absorption and time for slowing down the impact on the head restraint

This embodiment of the invention makes it possible to ensure safety in emergency situations during a frontal impact of a vehicle, both of a person sitting directly on the seat and of a passenger sitting behind, to ensure simplicity and reliability of the structure.

Claims (4)

1. A device for attaching a head restraint of a vehicle seat, comprising a head restraint with a pair of uprights installed in rails located in the back of the seat and connected at its lower part by a common crossbeam, characterized in that it is provided with a locking mechanism against vertical movement, and the rails in its upper parts are rigidly connected to bushings mounted to rotate on the upper part of the back frame and fixed from axial movement by U-shaped stops fixed to erhney portion of the carcass, wherein the guides are positioned to engage the webs U-shaped stops, moreover, the device is provided with spring elements, the upper ends of which are fixed on a common crossbeam, and the lower part of the lower backrest frame. 2. The mounting device for the headrest of a vehicle seat according to claim 1, characterized in that the locking mechanism from vertical movement is made in the form of transverse grooves on vertical struts and latches mounted on vertical racks with the ability to move with them. 3. The vehicle headrest mounting device according to claim 1, characterized in that the U-shaped stops are fixed at an angle to the upper part of the frame. 4. The mounting device for the headrest of the vehicle seat according to claim 1, characterized in that the spring elements are made in the form of zigzag springs "snakes".

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