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Motor vehicle seat

Motor vehicle seat description/claims

This invention relates to a vehicle seat for a motor vehicle.

In a known vehicle seat for an open motor vehicle or convertible (see German document DE 100 47 754 A1), to avoid an undesirable draft for the seat user, air discharge openings are provided level with the upper region of the backrest, which air discharge openings are connected to an air-distributing device integrated in the backrest. The air-distributing device has a fan and a heating element for heating the air flow. Of the air discharge openings, one is arranged in the upper side of the backrest and two are arranged in the lateral narrow sides of the backrest. The air discharge openings are oriented in such a manner that the air flow is discharged essentially in the transverse direction of the vehicle. To avoid eddies of cold air when traveling with the motor vehicle open, a wind deflector is integrated in the backrest, is designed, for example, as a roller blind, and can be extended out of the backrest or retracted into the backrest manually or by motor. In the extended position, the upper edge of the wind deflector is fixed to the rear side of the head cushion. In this case, the wind deflector extends over the entire width of the backrest and tapers toward the head cushion.

In another vehicle seat which is likewise known (see German document DE 101 60 799 A1) and which has an additional heating system for the head, neck and shoulder region of the seat user by means of hot air being blown out, a pressure connection of a hot air fan ends with its blow-out opening in the intermediate space between the head cushion and the upper side of the backrest. The normal of the blow-out opening of the pressure connection is oriented approximately horizontally, so that the head, neck and shoulder region of the seat user has hot air flowing directly against it.

One object of the invention is the object of more effectively designing the ventilation device for supplying hot air to the head, neck and shoulder region of the seat user so that, while any flow noises are negligible, the seat user experiences a comfortable sensation of heat without there being any draft.

This object is achieved according to the invention.

The vehicle seat according to the invention has the advantage that, by means of a diffuser present in the intermediate space between backrest and head cushion, the hot air blow-out opening, which is enclosed in the upper side of the backrest and is advantageously not directly visible, does not issue a directed and focused hot air stream which directly impacts against the neck and head and shoulder region of the seat user or flows past that region at a great flow rate. Rather, the opening issues a diffuse, fanned-out, gentle hot air flow which acts upon the neck and head region of the seat user and, as a result, in this region forms a type of hot air cushion which initiates a comfortable sensation of heat for the seat user. Owing to the fact that the diffuser covers the intermediate space between backrest and head cushion to the rear, the formation of the hot air cushion cannot be disturbed from the rear by horizontal air flows. By the length-variable diffuser being fixed to the head cushion and to the upper side of the backrest, this hot air cushion is produced and maintained irrespective of the size of the seat user and the head restraint height setting, which is dependent on seat user size. Advantageous embodiments of the vehicle seat according to the invention together with expedient developments and refinements of the invention are defined by the further patent claims.

According to a preferred embodiment of the invention, in the transverse direction of the seat, the diffuser covers the region between the two supporting rods of the head restraint. This affords the advantage that the view of the seat user, in particular of the driver, to the rear is not restricted, without compromises having to be made with regard to the hot air cushion produced in the head, neck and shoulder region of the seat user.

The invention is described in more detail below with reference to exemplary embodiments illustrated in the drawings.

FIG. 1 shows part of a side view of a vehicle seat, occupied by a seat user, with backrest, head restraint and hot-air ventilation device,

FIG. 2 shows part of a front view of the backrest with the head restraint in FIG. 1 without the seat user,

FIG. 3 shows an identical illustration as in FIG. 1 with a modified diffuser of the hot-air ventilation device,

FIG. 4 shows an identical illustration as in FIG. 1 with a diffuser according to a further exemplary embodiment,

FIG. 5 shows a section along the line V-V in FIG. 4,

FIG. 6 shows part of a front view of the backrest of a vehicle seat with a hot-air ventilation device according to a further exemplary embodiment, and

FIG. 7 shows a side view of the backrest with the hot-air ventilation device according to FIG. 6 with a modified diffuser.

• Provisional Patent
• Utility Patent

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