WO2016166009A1

WO2016166009A1 - Guide sleeve for a vehicle seat, vehicle seat, and method for producing a guide sleeve

Info

Publication number: WO2016166009A1
Application number: PCT/EP2016/057601
Authority: WO
Inventors: Karsten Wehling
Original assignee: Johnson Controls Gmbh
Priority date: 2015-04-15
Filing date: 2016-04-07
Publication date: 2016-10-20

Abstract

The invention relates to a guide sleeve (5) for receiving a rod (4) of a head restraint (3), comprising a sleeve body (6), which has a rod receptacle (10) for receiving the rod (4), wherein at least one insert (8) arranged on the inner contour of the rod receptacle (10) in some segments is provided. The invention further relates to a vehicle seat (1) for a motor vehicle, comprising a backrest (2) and a head restraint (3), wherein a previously described guide sleeve (5) is arranged on the backrest (2) in order to fasten the head restraint (3) to the backrest (2). The invention further relates to a method for producing a guide sleeve (5) for receiving a rod (4) of a head restraint (3), comprising a sleeve body (6), which has a rod receptacle (10) for receiving the rod (4), wherein an insert (8) is arranged on the inner contour of the rod receptacle (10).

Description

GUIDE SLEEVE FOR A VEHICLE SEAT, VEHICLE SEAT AND

METHOD FOR PRODUCING A GUIDE SLEEVE

The invention relates to a guide sleeve for receiving a rod of a

Headrest, with a sleeve body having a rod receptacle for receiving the rod. Another object of the invention is a vehicle seat for a motor vehicle with a backrest and with a headrest. Furthermore, the invention relates to a method for producing a guide sleeve for receiving a rod of a headrest with a sleeve body having a rod receptacle for receiving the rod.

PRIOR ART DE 199 19 335 B4 describes a guide sleeve which is used for fastening a headrest to the backrest of a vehicle seat. The guide sleeve is inserted into an opening in the backrest of a vehicle seat and serves to receive the rod of the headrest. to

Height adjustment of the headrest, the rod can be moved in the guide sleeve and possibly locked in a predetermined detent position.

Such guide sleeves have proven themselves in use. However, it has proved to be disadvantageous that the rod of the headrest can move slightly in the locked position relative to the guide sleeve. Therefore, it may be due to vibrations of the vehicle or the vehicle seat

unwanted rattling noises come. task

The invention is based on the object to improve a guide sleeve of the type mentioned above, in particular to reduce the noise caused by movement of the rod of the headrest in the guide sleeve, and to provide a vehicle seat with a guide sleeve according to the invention and a method for producing a guide sleeve according to the invention.

solution

The object is achieved by a guide sleeve for receiving a rod of a headrest with a sleeve body having a rod receptacle for receiving the rod, and with a on the inner contour of the rod receptacle

arranged insert.

By arranged on the inner contour of the rod receiving insert, the surface texture of the inner contour of the rod holder can be set at least in sections. In this respect, the nature of the surface of the inner contour of the rod receptacle can be chosen such that movements of the rod in the guide sleeve are reduced, which is a lesser

Noise development results.

Advantageous embodiments, which can be used individually or in combination with each other, are the subject of the dependent claims.

According to an advantageous embodiment of the sleeve body is formed of a first material and the insert is formed of a second, deviating from the first material. In this respect it is possible the

Adjust the surface finish of the inner contour of the rod holder regardless of the material of the sleeve body.

Particularly preferably, the sleeve body is made of a material with a high

Impact resistance formed, whereby the robustness of the guide sleeve opposite accidental impact is increased. In particular, the material of the sleeve body has a higher impact resistance than the material of the insert. It has proven to be advantageous if the sleeve body is made of a polyamide, for example nylon or Perlon. It is particularly advantageous if the

Sleeve body of an impact-modified polyamide, such as impact-modified nylon or impact modified Perlon is formed. For example, the sleeve body may be made of Akulon® K223-TP4.

An advantageous embodiment provides that the insert is formed from a material with a low coefficient of friction, whereby the force required for height adjustment of the headrest is reduced. In this respect, it is possible to increase the force acting on the rod of the headrest by the use of contact force, without the force required for height adjustment of the headrest

to influence significantly. Preferably, the coefficient of friction of the material of the insert with respect to a given reference material is less than that

Coefficient of friction of the material of the sleeve body with respect to the same reference material. The insert may be formed of a material comprising polyoxymethylene (POM). It is particularly preferred if the insert has a slip additive. The slip additive may be molybdenum disulfide, Teflon, chalk, wax or silicone. For example, the insert from HOSTAFORM® C9021

XAP ² , HOSTAFORM® C9021 M XAP ² , HOSTAFORM® C9021 TF5,

HOSTAFORM® C9021 TF XAP ² or HOSTAFORM® C9021 SW XAP ² LS. According to an advantageous embodiment, the insert is designed such that it partially or completely engages around a rod inserted into the rod receptacle. The insert may be formed as a sleeve.

Preferably, the sleeve body has a recess arranged on the inner contour of the rod receptacle, in particular a groove, in which the insert engages, whereby the insert can be fixed relative to the sleeve body. According to an advantageous embodiment of the insert is designed such that it protrudes at least partially from the inner contour of the rod receptacle, so that the cross-sectional area of the rod receptacle is reduced. As a result, unwanted movements of the rod, in particular in a locking position in which the rod is locked against the guide sleeve, reduced and the noise can be further reduced. The insert preferably has a projection which reduces the cross-sectional area of the rod receptacle. Of the

Projection can be designed as a circumferential, in particular closed, projection around a longitudinal axis of the rod receptacle. The protrusion may be dimensioned such that the extent of the cross-sectional area of the rod receptacle is reduced by a value in the range of 0.05 mm to 0.2 mm, in particular by 0.01 mm. Preferably, the insert has a plurality of projections spaced apart along the longitudinal axis of the rod receptacle, so that a

Reduction of the cross-sectional area takes place at several positions along the longitudinal axis.

A further advantageous embodiment provides that the guide sleeve has a plurality of inserts arranged on the inner contour of the rod receptacle, whereby the retention of the rod of the headrest in the guide sleeve can be further improved.

It is advantageous if the guide sleeve is a locking element for locking the rod relative to the guide sleeve in a predetermined

Has locking position, so that the headrest in a predetermined

Position can be set against the backrest.

The object is further achieved by a vehicle seat for a motor vehicle with a backrest and with a headrest, wherein a guide sleeve described above is arranged on the backrest for fastening the headrest to the backrest.

The object is further achieved by a method for producing a

A guide sleeve for receiving a rod of a headrest with a sleeve body having a rod receptacle for receiving the rod, wherein on the

Inner contour of the rod receiving an insert is arranged. In the vehicle seat and the manufacturing method, the same advantages as already associated with the invention

Guide sleeve have been described.

According to an advantageous embodiment of the method, the insert is arranged by an injection molding process on the inner contour of the rod receptacle, so that the production of the insert and the connection of the insert with the

Sleeve body can be done in a common process step. It is not necessary to first produce the insert and then to arrange in an assembly step on the sleeve body.

It is particularly advantageous if both the insert and the sleeve body are produced by an injection molding process, in particular a two-component injection molding process, so that both the insert and the sleeve body can be produced with a common injection molding machine.

The advantageous features described in connection with the guide sleeve can also alone or in combination in the vehicle seat and the

Use manufacturing process.

Figures and embodiments of the invention

Before describing embodiments of the invention in more detail with reference to drawings, it should first be noted that the invention is not based on the components described or the ones described

Procedural steps is limited. Furthermore, the terminology used is not a limitation, but has only exemplary character. Insofar as the singular is used below in the description and the claims, the plural is included in each case, unless the context explicitly excludes this. In the following, the invention is explained in more detail with reference to advantageous embodiments shown in the figures. However, the invention is not limited to these embodiments. It shows: a part of a vehicle seat in a perspective view; a guide sleeve according to a first embodiment in a side view; the guide sleeve of Figure 2 in a sectional view along the section line AA in Figure 2 with a recorded rod ..; an illustration of a guide sleeve according to a second

Embodiment in a sectional view along the section line A-A in Figure 2 without a recorded rod ..; an illustration of a guide sleeve according to a third

Embodiment; the guide sleeve of Figure 5 in a sectional view without recorded rod ..;

Fig. 7, the guide sleeve of FIG. 5 in a sectional view with

received rod;

8 is an illustration of a guide sleeve according to a fourth

Embodiment;

Fig. 9, the guide sleeve of FIG. 8 in a sectional view without

pickup rod; the guide sleeve of Figure 8 in a sectional view with recorded rod. 1, a vehicle seat 1 for a motor vehicle is shown, which may be designed as a front seat or as a back seat. The vehicle seat 1 has a backrest 2, of which in FIG. 1 only one frame is shown. Above the backrest 2, a headrest 3 is arranged, which has two parallel rods 4, which in at the top of the Rückenlehen second

provided openings are introduced.

In the openings of the backrest 2 each have a guide sleeve 5 is arranged, via which the rods 4 can be fixed to the backrest 2 of the vehicle seat 1.

As can be seen from the illustrations in FIGS. 2 and 3, FIG

Guide sleeve 5 according to a first embodiment, a substantially elongated structure. The guide sleeve 5 has an integrally formed

Sleeve body 6, which extends along a longitudinal axis L. By doing

Sleeve body 6, a rod receptacle 10 is provided, in which, as shown in Fig. 3, the rod 4 of the headrest 3 is received. The rod holder 10 has a circular cross-section. The rod 4 can by a in the

Figures not shown locking element of the guide sleeve 5 are locked in a plurality of predetermined positions, wherein the rod 4 protrudes more or less far from the rod holder 10. To adjust the height of the headrest 3, the rod 4 can be moved between these predetermined positions. The sleeve body 6 of the guide sleeve 5 is made of a plastic with a high

Formed impact resistance, whereby the robustness of the guide sleeve 5 is increased with respect to accidental impact. For example, the sleeve body 6 can be formed from Akulon® K223-TP4.

The guide sleeve 5 also has two on the inner contour of the

Bar receptacle 10 arranged inserts 8, on which the

Surface texture of the inner contour of the rod holder 10

in sections, in particular at least in the area of the inserts 8, is adjustable. The two inserts 8 each engage in a recess in the sleeve body 6. The inserts 8 are formed of a deviating from the material of the sleeve body 6 material, so that the surface texture of the inner contour of the Stangenaufnahnne 10 can be adjusted independently of the Matenal of the sleeve body 6. The material of the insert 8 is preferably a material with a low coefficient of friction, for example HOSTAFORM® C9021

XAP ² , HOSTAFORM® C9021 M XAP ² , HOSTAFORM® C9021 TF5,

HOSTAFORM® C9021 TF XAP ² or HOSTAFORM® C9021 SW XAP ² LS.

In the position shown in Fig. 3, the rod 4 of the headrest 3 is located directly on the two inserts 8, in particular on an inner contact surface of the inserts 8 at. As a result, unwanted rattling noise, which can be caused by slight movements of the rod 4 in the guide sleeve 5, reduced. Since the inserts 8 are made of a material with a low coefficient of friction, the force required to adjust the height of the headrest 3 force compared to a guide sleeve 5 is reduced without such an insert 8. 4 shows a modification of the first embodiment of the guide sleeve 5 shown in FIGS. 2 and 3, in the form of a second embodiment of the guide sleeve 5 with sleeve body 6 and two inserts 8. In contrast to the first exemplary embodiment, the inserts 8 are such designed such that the inserts 8 partially protrude from the inner contour of the rod receptacle 10. As a result, unwanted movements of the rod 4, in particular in a locking position in which the rod 4 is locked relative to the guide sleeve 5, reduced and the noise can be further reduced. Each insert has a about a longitudinal axis L of the rod holder 10th

completely circumferential projection 9. The projection 9 has a height by which the diameter of the rod holder 10 is reduced by a value in the range of 0.05 mm to 0.2 mm, in particular by 0.01 mm. Since a plurality of inserts 8 are provided with a projection 9 in the rod receptacle 10, which are arranged spaced apart along the longitudinal axis L, a reduction of the diameter takes place at a plurality of positions along the longitudinal axis L. The above-described guide sleeves 5 for receiving a rod 4 of a headrest 3 each have a sleeve body 6, which comprises a rod receptacle 10 for receiving the rod 4. On the inner contour of the rod holder 10, an insert 8 is arranged, through which the surface texture of the

Inner contour of the rod receptacle 10 can be set at least in sections. In this respect, it is possible to reduce unwanted movements of the rod 4 in the guide sleeve 5, resulting in less noise. In a third embodiment shown in FIG. 6 and FIG. 7, it is provided that the guide sleeve 5 has exactly one insert 8. In this respect, the insert 8 can be formed in one piece. The insert 8 may have a plurality of projections 9, which are preferably arranged spaced apart along the longitudinal axis L. Also, the projections 9 deviating from a full extent in the circumferential direction can be arranged uniformly distributed only at least 3 limited sections. It is also possible that the projections 9 have a longitudinal extent along the longitudinal axis L. In the figures 8, 9 and 10, a fourth embodiment of the guide sleeve 5 is shown. Notwithstanding the example described above

Embodiments, the insert 8 is designed according to the fourth embodiment substantially in the form of a sleeve. The insert 8 has on its inside projections 9, which, after attaching the insert 8 to one end of the sleeve body 6 of the guide sleeve 5, with recesses in

Coil body 6 cooperate, that on the one hand the insert 8 is thereby fixed on the sleeve body 6, and on the other hand projecting from the outside into the recesses projections 9 protrude from the inner contour of the sleeve body 6 to provide a contact surface for the rod 4. A further projection 9 of the insert 8 can be realized in that a on the sleeve body. 6

projecting portion of the insert 8 has a smaller inner diameter than the inner diameter of the sleeve body. 6 The guide sleeves 5 described above can be produced by a two-component sputtering method, in which, in a first step, the sleeve body 6 consisting of the first material is connected to the

Bar receptacle 10 is formed and in a second step following the first step from the second material of the insert 8 is formed on the inner contour of the rod receptacle 10. In this respect, the use in the production is formed directly on the sleeve body 6 and does not have to be connected in a wide step with this. Preferably, a two-component injection molding process with a rotatable tool (so-called turning-plate tool) is used.

The features disclosed in the above description, the claims and the drawings can be used both individually and in combination for the

Realization of the invention in its various embodiments of

Meaning.

Although the invention has been described in detail in the drawings and the foregoing description, the illustrations are illustrative and exemplary and not limiting. In particular, the choice of the proportions of the individual elements shown in the drawing should not be construed as necessary or restrictive. Furthermore, the invention is not limited in particular to the illustrated embodiments. Other variants of the invention and their execution will be apparent to those skilled in the art from the foregoing

Revelation, the figures and the claims.

Terms used in the claims, such as "comprising,""having,""including,""containing," and the like, do not exclude other elements or steps. The use of the indefinite article does not exclude a majority. A single device can perform the functions of several units or devices mentioned in the claims. LIST OF REFERENCE NUMBERS

1 vehicle seat

2 backrest

3 headrest

4 pole

5 guide sleeve

6 sleeve body

8 use

9 lead

10 pole recording

L longitudinal axis

Claims

claims

Guide sleeve (5) for receiving a rod (4) of a headrest (3), with a sleeve body (6), which has a rod receptacle (10) for receiving the rod (4),

characterized,

in that at least one insert (8) arranged in sections on the inner contour of the rod receptacle (10) is provided.

Guide sleeve (5) according to claim 1, wherein the sleeve body (6) formed of a first material and the insert (8) is formed of a second, deviating from the first material.

Guide sleeve (5) according to claim 2, wherein the material of the sleeve body (6) has a higher impact resistance than the material of the insert (8).

A guide sleeve (5) according to any one of the preceding claims, wherein the insert (8) is formed of a material having a coefficient of friction, the coefficient of friction of the material of the insert (8) with respect to a given reference material being less than the coefficient of friction of the material of the sleeve body ( 6) with respect to the same reference material.

Guide sleeve (5) according to one of the preceding claims, wherein the insert (8) is designed such that it partially or completely surrounds a bar (4) introduced into the rod receptacle (10).

Guide sleeve (5) according to one of the preceding claims, wherein the sleeve body (6) has a on the inner contour of the rod receptacle (10).

having arranged recess in which the insert (8) engages.

A guide sleeve (5) according to claim 6, wherein the recess is a groove.

8. guide sleeve (5) according to one of the preceding claims, wherein the insert (8) is formed such that it at least partially from the

Inner contour of the rod receptacle (10) protrudes, so that the

Cross-sectional area of the rod receptacle (10) is reduced.

9. guide sleeve (5) according to one of the preceding claims, wherein the

Insert (8) has a projection (9).

Guide sleeve (5) according to one of the preceding claims, wherein the guide sleeve (5) has a locking element for locking the rod (4) relative to the guide sleeve (5) in a predetermined locking position.

1 1. Vehicle seat (1) for a motor vehicle with a backrest (2) and with a headrest (3),

characterized,

for securing the headrest (3) to the backrest (2) a

Guide sleeve (5) according to one of the preceding claims on the

Backrest (2) is arranged.

12. A method for producing a guide sleeve (5) for receiving a rod (4) of a headrest (3), with a sleeve body (6) having a

Bar mount (10) for receiving the rod (4),

characterized,

in that an insert (8) is arranged on the inner contour of the rod receptacle (10).

13. The method according to claim 12, wherein the use by a

Injection molding is arranged on the inner contour of the rod holder.

14. The method according to claim 13, wherein both the insert and the

Sleeve body are produced by a common injection molding process.

15. The method of claim 14, wherein the insert and the sleeve body are produced by means of a two-component injection molding process.