JPH04269912A - Connection fitting for seat - Google Patents

Abstract

PURPOSE: To reduce a number of components for supporting a wedge part which forms an eccentric ring, on an oscillating shaft, by making an engagement body integrally formed or welded on the oscillating shaft. CONSTITUTION: An oscillating shaft 17 comprises an engagement body 24, for forming an eccentric part for eccentrically supporting a flat gear 12 to an annular gear 14, and the engagement body 24 comprises two stopper projections 19 punched from a periphery of the oscillating shaft 17 at an interval. The stopper projection 19 comprises a stopper face 20 for supporting a wedge part 26 formed from one part. Further the wedge part 26 has a shape satisfying that the eccentric part formed by the engagement range and the wedge part 26, has the eccentric distance for making the flat gear 12 engaged with the annular gear 14 in an engagement position, and releasing the gear cutting parts 13, 15 from the engagement at the side opposite to the engagement part.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] In the present invention, a fixed joint part attached to a seat part and a swingable joint part attached to a backrest are connected to each other via a swing shaft, and both joint parts are mutually connected. A moving and fixing device configured as a transmission is provided for determining the position, the support of one joint part being carried out on an eccentric part of a swivel shaft, which swivel shaft forms an eccentric wheel. The invention relates to a fitting for a seat, in particular a motor vehicle seat, with an adjustable backrest, having a relatively non-rotating engagement body for supporting at least one wedge-shaped part.

0002

[Prior Art] Federal Republic of Germany Patent No. 3013304
In the above-mentioned type of fitting known from the specification, the engaging body consists of a disc, which disc has engaging projections arranged at an angle of more than 180° to each other and is oscillating. It is fixed so that it does not rotate relative to the moving shaft. This disc is surrounded by a hole in the coupling part supported by the eccentric part, which hole is held in the eccentric position by a wedge-shaped part arranged on the engaging disc between the engaging projections. The two wedge-shaped parts with a crescent-shaped cross section, which taper towards the engagement projections and can be subjected to forces by these engagement projections, are pushed toward each other by the energy accumulator in the region of the apex of the eccentric wheel and The hole provided in the shaft is supported on the swing shaft. In practice, it has been found suitable for reasons of manufacturing technology to use a locking sleeve with a locking projection for supporting the wedge-shaped part instead of the locking disk. This engagement sleeve is fixed to the swing shaft by a tightening pin. By using both wedge-shaped parts, it is achieved that there is no play between the meshing points and the supporting points in the case of fixing. Instead of both wedge-shaped parts, it is also sufficient in simple cases to use only one crescent-shaped wedge-shaped part, which tapers from the middle region towards the end and swings together with the engagement body. Forms an unchanging eccentric part of the moving axis. In the latter case, it goes without saying that the play that is functionally caused by movement also exists in the fixed case. However, in each case, depending on the requirements of the engaging body, the oscillating shaft has three components, namely the shaft end, which forms the fundamental element of the oscillating shaft, and the wedge-shaped part for the formation of the eccentric part. It must consist of an engaging body or an engaging sleeve connectable to the shaft end and at least a coupling element fixing the mutual position of the shaft end and the engaging body.

0003

SUMMARY OF THE INVENTION An object of the present invention is to reduce the number of components for supporting the wedge-shaped part forming the eccentric on the pivot shaft.

0004

According to the present invention, this problem is solved in that the engaging body is integrally formed or welded to the swing shaft.

[0005] It is advantageous to form the engagement body as a stop protuberance punched out of the pivot shaft. This makes it possible to form the pivot shaft from only one component. This is because the engaging body for supporting the wedge-shaped portion forming the eccentric ring is integrally formed on the pivot shaft as a component consisting of one part of the pivot shaft. This simplifies the manufacture and assembly of the fitting.

For surface contact of the wedge-shaped part of the engaging body of the rocking shaft in the case of movement, the two stopper elevations arranged at a distance from each other preferably have a stopper surface that is as flat as possible; The stopper surface of is within the range of the semi-circumference of the swing axis. In this case, in order to self-support the hole of one of the joint parts provided in the eccentric part, the stop surfaces are at least 180° to each other, preferably about 220° to 260°.
Advantageously, they are spaced apart at an angle of .

[0007] Formation of a flat stopper surface in the stopper ridge is easy if the side surface of the recess formed in the swing shaft for forming the stopper ridge is arranged at right angles to the stopper surface. This can be achieved through a unique pressing process.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention will be explained in detail below with reference to embodiments shown in the drawings.

The joint fittings include a lower joint part 10 which can be fixedly connected to the seat part, an upper joint part 11 which can be connected to the backrest and can swing, and this upper joint part 11 is connected to the lower joint part 10. It has a moving and fixing device that allows it to swing against the ground.

[0010] This moving and fixing device is, for example, a joint part 1.
It includes a spur gear 12 with external teeth 13 formed by stamping from 0, which external teeth correspond to internal teeth 15 of an annular gear 14 of the coupling part 11 formed by stamping, for example.
interlock with each other. The diameter of the tip circle of the external tooth 13 is smaller than the diameter of the root circle of the internal tooth 15 by at least one tooth height. Gearing parts 13 and 15 therefore have a different number of teeth by at least one tooth, the number of internal teeth 15 being greater than the number of external teeth 13. This arrangement
The internal teeth 15 of the joint part 10 are selected in such a way that they can roll over the external teeth 13 of the coupling part 10.

The disk produced during the formation of the internal teeth 15 of the ring gear 14 and connecting this ring gear concentrically is:
A strip 25 is supported on a section 18 of the pivot shaft 17, on which a strip 25 is also supported, which is fixedly connected to the upper coupling part 11 and covers the coupling part 10 in the area of the coupling hole. A concentric engagement part 22 adjoins the pivot shaft 17 projecting from this strip 25, which has a non-circular cross-section with a central threaded hole formed by a chamfer. A handle, not shown, which can be used for adjustment, can thereby be held against relative rotation. Part 18 is followed by another engaging part 23, which has a slit, which serves for the rotational engagement of the transmission shaft to the coupling fitting arranged on the other longitudinal side of the seat. .

In order to form an eccentric portion for eccentrically supporting the spur gear 12 with respect to the annular gear 14, the swing shaft 1 is
7 is provided with an engaging body 24, which is formed from two stopper ridges 19 punched out from the circumference of the pivot shaft 17 at a distance. These stopper protuberances 1
9 is a stop surface 2 for supporting a wedge-shaped part 26 formed from one part in the embodiment according to FIGS. 1 and 2;
It has 0. The stopper surfaces 20 on the wedge-shaped portion 26 side of each stopper ridge 19 form an angle of 180° or more with respect to each other. In the example shown in FIGS. 1 and 2, this angle is chosen to be 245°. The stopper ridges 19 formed by the notches of the rocking shaft 17 are such that the stopper surfaces 20 of these stopper ridges 19 are located on the side surface 21 of the notch on the rocking shaft.
It is formed at right angles to the Figures 1 and 2
The wedge-shaped portion shown in FIG.
3 and 15 are shaped such that they have an eccentric distance such that they are disengaged on the opposite side from the engaged point.

In the embodiments shown in FIGS. 1 and 2, the play required for the movement function cannot be eliminated. In the embodiment that can be seen in FIG. 3, the wedge-shaped section 26 is replaced by two wedge-shaped sections 26' and 26'', which are stored at the apex of the eccentric between these wedge-shaped sections 26' and 26''. It is arranged between the stopper ridges 19 in such a way that the forceps 27 can be arranged. The manner of operation of this embodiment, which can be seen in FIG. 3, is the same as in the solution according to DE 30 13 304.

As already mentioned, the embodiments shown and described above only illustrate the subject matter of the invention by way of example, and the subject matter of the present invention is in no way limited thereto. On the contrary, various variations and other configurations of the subject matter of the invention are possible. Moreover, all novel features mentioned in the description or shown in the drawings are important to the invention, even if they are not explicitly claimed in the claims.

[Brief explanation of the drawing]

1 is a vertical cross-sectional view of a fitting with only one wedge-shaped part according to the invention; FIG.

[Figure 2] II-II in Figure 1 of the joint fittings that can be seen in Figure 1
It is a sectional view along a line.

FIG. 3 shows a sectional view of a further embodiment of a fitting in which the eccentric part is formed from two wedge-shaped parts for play elimination, which are supported on a pivot axis;

[Explanation of symbols]

17 Swing axis 24 Engagement body

Claims (5)

[Claims] [Claim 1] A fixed joint part attached to the seat part and a swingable joint part attached to the backrest, characterized in that the engaging body (24) is integrally formed or welded to the swing shaft (17). The parts are connected to each other via a pivot shaft, and a moving and fixing device is provided, which is designed as a transmission and which determines the mutual position of the two joint parts, so that the support of one joint part is fixed to the other by a rocking shaft. For a seat with an adjustable backrest, the pivoting axis being carried out on an eccentric part of the pivot axis, the pivot axis having a relatively non-rotating engagement body for supporting at least one wedge-shaped part forming an eccentric wheel. Fittings. [Claim 2] The engaging body (24) includes a swing shaft (17).
2. Fitting according to claim 1, characterized in that it is provided with a stop protuberance (19) punched out from ). [Claim 3] Two stopper ridges (19) arranged at a distance from each other have a stopper surface (20), and these stopper surfaces extend in a semicircular range of the swing axis (17). 3. The fitting according to claim 2, wherein the fitting is arranged in a plane perpendicular to a certain longitudinal axis. [Claim 4] The stopper surfaces (20) are 180° to each other.
The joint fittings according to claim 3, characterized in that the fittings are spaced apart at an angle greater than or equal to the above. 5. The side surface (21) of the recess formed in the swing shaft (17) for forming the stopper protuberance (19) is arranged at right angles to the stopper surface (20). 5. The joint fitting according to claim 1, wherein the joint fitting is a waiting sign.