Tubular filaments spring

Abstract

The invention relates to a spring, in particular to move at least one part of a fixture of the vehicle interior space. It was the object of the invention to create a spring, that does not cause disturbing noises due to vibrations. The object is solved by the spring being made of plastic.

Claims

1. A fixture of a vehicle interior space comprising: a first part; a second part that can be moved in relation to the first part between a first position and a second position; and a spring that urges the second part into the first position and that comprises a first end ring; a second end ring; and a tubular wall extending along a longitudinal axis between the rings and formed of first plastic filaments extending at an angle to the longitudinal axis and second plastic filaments also extending at an angle to the axis, and crossing the first filaments, the end rings having a first spacing from each other in a slackened first position of the spring with the tubular wall radially constricted between the rings and a different second spacing shorter than the first spacing from each other in at least one loaded second position with the tubular wall radially bulging between the rings.

2. The fixture according to claim 1, wherein the spring is a compression spring or a tension spring.

3. The fixture according to claim 1, wherein the spring is extensible or compressible in a direction parallel to the longitudinal axis.

4. The fixture according to claim 1, wherein the fixture is a headrest.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) Regarding advantages, reference is made to the embodiments concerning the first aspect of the invention.

(2) Other advantages of the invention are revealed through one embodiment depicted in the drawings. The figures show:

(3) FIG. 1 a front view of a headrest with a head box and with support bars for mounting on a vehicle seat that is not shown,

(4) FIG. 2 a view according to view arrow II in FIG. 1,

(5) FIG. 3 a cross-section view in accordance with view arrow III-III in FIG. 2, wherein the actuating apparatus is situated in a non-actuated position,

(6) FIG. 4 a cross-section view in accordance with cut-out line IV in FIG. 3,

(7) FIG. 5 the section following FIG. 5, wherein the actuating apparatus is in the actuated position,

(8) FIG. 6 the spring as an individual piece in a slackened position,

(9) FIG. 7 the spring as an individual piece in a loaded position,

(10) FIG. 8 a cross-section illustration in accordance with (in text) cut-out line VIII-VIII in FIG. 6.

SPECIFIC DESCRIPTION OF THE INVENTION

(11) Altogether, a headrest is indicated in the drawings with the reference number 10.

(12) In accordance with FIG. 1, the headrest 10 comprises a head part 11 as well as support bars 12, with which the head part 11 can be supported on the backrest of a vehicle seat that is not shown. A headrest surface 13 is designed on the head part that acts as an abutment for the head of a vehicle passenger.

(13) The head part 11 is supported relative to the support bars in the direction z.sub.1 and z.sub.2 in a moveable manner. By means of a latch 16 (see FIG. 3), the head part 11 can be locked relative to the support bars 12 in various relative positions. In addition, an arrangement of a plurality of notched catches 40 are formed on the support bars 12 (see FIG. 2). In a locked position, a bar assigned to the head part 11 engages in one of the notched catches so that a movement of the head part 11 in one of the directions z.sub.1 or z.sub.2 or in both directions z.sub.1 and z.sub.2 is prevented.

(14) In accordance with FIG. 3, the head part 11 comprises a slider 17 that can be moved into direction y.sub.1 and y.sub.2. Two bars are assigned to the slider 17, wherein each bar interacts with one of the notched catches 40. In a release position of the latch 16, the bolt is not engaged in one of the notched catches and the head part 11 can be moved into direction z.sub.1 or z.sub.2.

(15) The latch 16 can be adjusted by means of an actuating apparatus 14 between the locking position and the release position. The actuating apparatus 14 comprises an actuating element 15, for a user being able to adjust the actuating apparatus between a rest position and an actuating position by applying pressure to an actuating surface 28 of the actuating element 15 in the direction y.sub.1. The latch 16 can be adjusted in the release position by moving the actuating element 15 out of the rest position in direction y.sub.1 into an actuating position. The actuating element 15 is connected to the slider 17 in a moveable manner. The actuating element 15 automatically resets into the rest position in direction y.sub.2, which be explained in the following in detail.

(16) In FIG. 4, the actuating apparatus 14 is shown as an assembly. The actuating apparatus 14 comprises a shell-shaped housing 18 that is permanently attached to the head part 11. The actuating element 15 is lead from the housing 18 during its movement between the rest position and the actuating position. An outer surface 19 of the actuating element 15 slides along an inner surface 20 of the housing 18. A radially protruding hook 21 formed on the actuating element 15 is led through a recess 22 that is formed in the housing 18. The recess 22 has the function of a slotted piece to guide the movement of the actuating element 15 and to limit it.

(17) The actuating element 15 is provided with a seat 23 and the housing 18 is provided with a seat 24. The seat 23 and the seat 24 are facing each other. Both seats 23 and 24 have the shape of a cylindrical protrusion. On the seat 24, a first end section 37 of a spring 36 and on the seat 23, a second end section 38 of the spring 36 is placed.

(18) The first end section 37 surrounds the seat 24 coaxially and is set onto the seat 24 in such a way that a front surface of the end section 37 lies against a floor surface 27. The second end section 38 surrounds the seat 23 coaxially and is set onto the seat 23 to such an extent that a front surface of the end section 38 lies against a shoulder 26.

(19) The resting position is shown in FIG. 4 and the actuating position is shown in FIG. 5. In FIGS. 4 and 5, a guide bridge 25 is apparent that limits the elastic deformation of the spring 36 to a definite range.

(20) In FIG. 6, the spring 36 is shown as an individual piece. It can be noticed that the spring 36 comprises filaments 34 and 35. The filaments 34 form an angle with the filaments 35 so that the filaments 34 and 35 cross. Furthermore, the filaments 34 form an angle to the longitudinal axis m. That means the filaments 34 and 35 are not arranged parallel to the longitudinal axis m.

(21) Altogether, the spring 36 comprises three layers 31, 32 and 33 that are arranged in succession in a radial manner. The outer layer 31 is made of filaments 34; a middle layer 32 is made of filaments 35; and an inner layer 33 is made of filaments 34. All filaments 34 and 35 are permanently connected at an end to a ring structure 29 of the first spring and 37 and an opposite end to a ring structure 30 of the second spring and 38.

(22) In FIG. 6, the spring is shown in the slackened position. The spring 36 assumes the slackened position in the rest position of the actuating apparatus. In accordance with an alternative embodiment, the spring 36 could already be subject to a slight amount of pre-tension in the rest position. In the resting position, the spring 36 has a length 11.

(23) In FIG. 7, the spring is shown in the loaded position. The spring assumes the loaded position in the actuating position of the actuating apparatus 14. In the loaded position, the spring 36 has a length 12. Length 12 is less than length 11 because the spring 36 is compressed in the loaded position in the present embodiment. Due to the compression, the spring 36 forms a ring-shaped bulge 39 that protrudes radially.

(24) In FIG. 8, a longitudinal view is shown by the spring 36.

(25) Independent of the position, the spring 36 does not cause any noises due to vibrations, as is the case with metal springs for example.