DE10318928A1 - Collapsible/expandable head restraint for a motor vehicle's seat adjusts its height by means of a pneumatic adjusting device designed as collapsible bellows - Google Patents

Abstract

A head restraint (1) has an inactive position (R) inside a motor vehicle's seat (2) or inside an upper end (2.2) of a seat back and an operating position (B) outside the seat back adjusted to the height of a driver's head. A sensor inside the motor vehicle's seat surface activates the head restraint.

Description

The The invention relates to a headrest for a motor vehicle seat at least a first sliding bearing and a translatory acting Adjustment.

It is already an automatically controlled headrest from the DE 28 47 795 A1 known, which is set or moved over a sensor in the driver's seat in height. Here, a rest position A within the seat or the backrest part and several operating positions B and C are possible. The headrest is driven via a mechanical gear with a motor, which is connected via a control circuit with the sensor in the seat in operative connection.

Of the Invention is based on the object, a headrest such form and arrange that ensures easy adjustment is.

Is solved the task according to the invention by that the adjusting device is a pneumatically formed actuator having a first gas volume operatively connected to a pump stands. This ensures that the control of the pump, the above an arbitrarily arranged control line is connected to the actuator, the position of the headrest is adjustable. An arrangement of mechanical gear members, the In addition, increase the weight of the vehicle seat, is not necessary. By the sinking of the headrest inside the vehicle seat, the sense of space is increased and at Folding motor vehicle seats is not the expansion of the headrests required. additionally can the headrest in combination with the airbag function from safety-related establish be activated accordingly fast in the event of a collision.

For this It is advantageous that the actuator as a gas piston, as Folding bellows and / or is designed as an airbag. The use of a Bellows guaranteed a lightweight design and is also maintenance-free.

A additional possibility is according to a further development, in that the actuator acts in the direction of movement of the headrest Biasing element and the biasing element as a spring or as Bellows is formed. By using the preload element is at least one adjusting movement of the headrest or the actuator at Failure of the adjustment or the pump guaranteed. For safety reasons is the adjusting movement upwards into an operating position by the Spring provided. When using the bellows as Spring and actuator is not an additional biasing element necessary.

Advantageous it is this also that a rest position R within the vehicle seat and an operating position ensured by the biasing spring B with respect to the vertical above the rest position R provided is. In the rest position R the increased sense of space is ensured and a decrease the headrest for a Moving the vehicle seat avoided.

According to one preferred embodiment of inventive solution in the end provided that the actuator with a gas pressure supply of lumbar support or other pneumatic elements of the motor vehicle seat in operative connection stands and / or the adjusting device with a sensor in one seat the vehicle seat is in operative connection. Thus, an additional pump unnecessary. In unoccupied vehicle seat, the feeling of space is not impaired and in folding motor vehicle seats is the expansion of the respective headrests not mandatory.

From special meaning is for the present invention that the headrest a second the shape of the headrest having generating gas volume, wherein the second gas volume with the first volume of gas and / or with the pump and / or with a Airbag system is in flow communication and a pressure-free rest position R within the vehicle seat and a pressurized Operating position B outside the motor vehicle seat is provided, wherein a motor vehicle seat in the rest position R occlusive Cover provided with respect to the vertical at the upper side of the headrest is. The headrest points in a deflated state a significantly smaller volume of construction, so that the motor vehicle seat be designed to be correspondingly narrow can. additionally can the headrest in combination with the airbag function from safety-related Reasons in the Collision case can be activated accordingly fast. By the Cover is the recess in which the headrest in their Rest position R is closed.

Further Advantages and details of the invention are in the claims and explained in the description and shown in the figures.

there demonstrate:

1 a motor vehicle seat in the front view with a headrest and a Verstellein direction;

2 a motor vehicle seat in the side view with a headrest and an adjustment.

A motor vehicle seat 2 according to 1 has a headrest 1 on that at its upper end 2.2 is provided. The headrest 1 is from this operating position B inside in the motor vehicle seat 2 adjustable to a rest position R.

Inside the vehicle seat 2 is the headrest 1 about a first camp 3.1 as well as a second camp 3.2 slidably guided in the vertical direction.

For a change between the operating position B and the rest position R is an adjustment 4 with an actuator 4.1 intended. The actuator 4.1 is designed as a gas pressure piston, wherein its gas volume 4.2 with a pump 4.3 is in active connection. The actuator 4.1 is here via a first connection element 4.5 and a second connecting element 4.6 with the headrest 1 mechanically connected.

The pump 4.3 promotes gas or ambient air into the gas pressure piston 4.1 so the headrest 1 moves from the rest position R to the operating position B. In case of a reversal of the delivery rate of the pump 4.3 becomes the gas piston 4.1 deflated, leaving the headrest 1 moves from the operating position B in the rest position R. Depending on the control of the actuator 4.1 or the pump 4.3 are also intermediate positions of the headrest 1 between the operating position B and the rest position R possible.

Next to the actuator 4.1 is a trained as a compression spring biasing element 4.4 between the gas piston 4.1 and the first connection element 4.5 or the second connecting element 4.6 intended. In case of failure of the gas pressure piston 4.1 thus becomes the headrest 1 moved into their operating position B and ensures the functionality.

According to 2 is at the top 2.2 of the vehicle seat 2 a recess 2.3 for the headrest 1 intended. The headrest 1 is again about the first camp 3.1 within the vehicle seat 2 or a backrest 2.4 of the vehicle seat 2 arranged.

The adjusting device 4 indicates the actuator 4.1 with the first gas volume 4.2 on that with the pump 4.3 is in active connection. By the delivery rate of the pump 4.3 becomes the gas piston 4.1 pressurized with gas, leaving the headrest 1 in an operating position B 'moves. By draining or sucking off the gas from the gas pressure piston 4.1 through the pump 4.3 this is emptied and the headrest 1 moves into a lower, within the recess 2.3 provided rest position R '.

The headrest 1 is in this case upwards by a cover 1.1 limited, which in the rest position R 'the recess 2.3 of the vehicle seat 2 or the backrest 2.4 closes at the top.

Within a seat 2.1 of the vehicle seat 2 is a sensor 5 provided, via a control device, not shown, with the pump 4.3 is in operative connection and the capacity of the pump 4.3 depending on the occupation of the vehicle seat 2 certainly.

1

headrest

1.1

cover

2

Automotive seat

2.1

seat

2.2

upper The End

2.3

recess

2.4

backrest

3.1

first camp

3.2

second camp

4

adjustment

4.1

Actuator Bellows, gas piston

4.2

first gas volume

4.3

pump

4.4

Biasing member feather

4.5

first connecting element

4.6

second connecting element

5

sensor

Claims (10)

Headrest ( 1 ) for a motor vehicle seat ( 2 ) with at least one first sliding bearing ( 3.1 ) and a translationally acting adjusting device ( 4 ), characterized in that the adjusting device ( 4 ) a pneumatically formed actuator ( 4.1 ) with a first gas volume ( 4.2 ) provided with a pump ( 4.3 ) is in operative connection. Headrest according to claim 1, characterized in that the actuator ( 4.1 ) is designed as a gas pressure piston, as a bellows and / or as an airbag. Headrest according to claim 1 or 2, characterized in that the actuator ( 4.1 ) in the direction of movement of the headrest ( 1 ) acting biasing element ( 4.4 ) having. Headrest according to one of the preceding claims, characterized in that the pretensioning element ( 4.4 ) is designed as a spring or as a bellows. Headrest according to one of the preceding claims, characterized in that a rest position R within a recess ( 2.3 ) of the motor vehicle seat ( 2 ) and an operating position B with respect to the vertical above the rest position R is provided. Headrest according to one of the preceding claims, characterized in that the actuator ( 4.1 ) with a gas pressure supply of the lumbar support or other pneumatic elements of the motor vehicle seat ( 2 ) is in operative connection and / or the adjusting device ( 4 ) with a sensor ( 5 ) in a seat ( 2.1 ) of the vehicle seat ( 2 ) is in operative connection. Headrest according to one of the preceding claims, characterized in that the headrest ( 1 ) a second the shape of the headrest ( 1 ) has forming gas volume. Headrest according to one of the preceding claims, characterized in that the second gas volume with the first gas volume ( 4.2 ) and / or with the pump ( 4.3 ) and / or is in flow communication with an airbag system. Headrest according to one of the preceding claims, characterized in that a pressure-free rest position R within the motor vehicle seat ( 2 ) is provided and a pressurized operating position B outside the motor vehicle seat ( 2 ) is provided. Headrest according to one of the preceding claims, characterized in that a recess of the motor vehicle seat ( 2 ) in the rest position R occlusive cover element ( 1.1 ) with respect to the vertical at the upper side of the headrest ( 1 ) is provided.