JP2704786B2 - Seat fittings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a fixed joint portion attached to a seat portion and a swingable joint portion attached to a backrest, which are connected to each other via a swing shaft. A moving and fixing device is provided for determining the mutual position of the two coupling parts, one of the moving components being rotated with respect to the pivotable coupling part to form a pivoting device. It is configured as a possible disc, this disc has a toothed part on the outer circumference, a claw provided on a swingable joint part engages with this toothed part, and this claw is The invention relates to a fitting for a seat, in particular a motor vehicle seat, with a movable and pivotable backrest, which is engaged with a control lever which is operable for release and which can be returned for restraint.

[Conventional technology]

A joint fitting having a movable and fixed device that can be driven via an eccentric shaft of a swing shaft, configured as a staggered transmission device,
It is already known from DE 2446181. This fitting is particularly suitable for use in front doors for two-door vehicles, where the backrest can be fine-tuned to find the most favorable seating position, but the backseat must be made accessible to the backseat. ing. Therefore, on the one hand, the tilt adjustment of the backrest,
This is possible via a known moving and fixing device configured as a wobble transmission, on the other hand, via a coupling part with a spur gear, fixed to the seat part and a pawl rotatably arranged therein, It can be fixedly connected to create a forward rocker for the backrest. The swingable disc having a spur gear has an engaging portion formed as an arcuate gear cutting portion on the outer periphery, and a claw having an opposing gear cutting portion can be engaged with this engaging portion, and This engagement position is fixed by a swingable support lever. The connection between the coupling part fixed to the seat part and the rotatable disk with spur gears is also inadequate.
This is because the play of supporting the pawl in the joint part fixed to the seat part and the play in the toothed portion of the pawl and the rotatable disk cannot be reliably removed. Furthermore,
The jaw and rotatable disc hog sizing poses a problem for possible crash situations. This is because only the tooth cuts of the pawls and the arcuate cuts of the rotatable disc counter the accident-caused forces introduced into the rotatable disc from the backrest.

German Offenlegungsschrift 35 27 522 discloses a fitting with a pawl restraint for adjusting the backrest, in which a separate pawl is already used to hold the restraining disc, and this restraining circle is used. In addition to the contact surface for the addition of the notch of the restraint plate, the plate also has toothed protrusions which fit into the tooth spaces of the restraint plate without play. This play-free connection with the restraint plate in the area of the tooth cut of the nail,
It must be achieved by a specific tooth shape. This play-free toothed connection may be sufficient for the appropriate use of the application, but requires a projection on the restraint plate and a claw contact surface for its support in the event of high forces caused by accidents In the event of a collision, there is, firstly, a structurally occurring play between the projection and the contact surface when there must be assurance of play-free by means of the tooth cutting area. In order to bring the contact surfaces into contact, they must first be overcome. Furthermore, this known solution does not allow for fine adjustment of the backrest tilt. This is because the adjustment of the backrest with respect to the coupling part fixed to the seat part is effected by means of a pawl coupling of known construction.

[Problems to be solved by the invention]

The object of the present invention is to improve a joint fitting of the type mentioned at the outset, in which, besides the playless connection of the joint part with a rotatable disc, this disc also has a pivotable joint in other circumferential ranges. The aim is to make the parts accessible without play.

[Means for solving the problem]

According to the present invention, a control lever having a control curved surface having an opening track, a restraint preparation section, and a tightening track acts on a claw, and the claw is swingable so as to be limited and eccentric. The problem is solved in that the stop surface of the coupling part is provided on the coupling part and, in the case of a restraint, is clamped towards the support cam of the rotatable disk. This allows for a multipoint support between the joint part and the rotatable disk, so that a completely playless connection between the joint part and the rotatable disk can be achieved in the case of restraint.

The eccentric support of the pawl in the pivotable joint part, which allows this clamping between the pivotable joint part and the rotatable disc, is characterized in that the pawl support point is This is advantageously achieved by being formed by a projection fixed to the part and a slot-like hole surrounding the projection.

It is the control surface of the control lever that acts on the pawl that initiates this tightening, and the constrained portion of this control surface is formed by the intersection of the separation trajectory and the tightening trajectory, and the separation trajectory can swing. The inclining track extends radially inward with respect to the rotation axis of the control lever provided in the coupling portion, and the clamping track extends inward with the radial inclination. The automatic return of the control lever takes place in a known manner via a spring element. In this way, the pawl can be pushed without play into the rotatable disk gear during the aforementioned course of the clamping track.

In order to limit the pivoting movement of the backrest in one and the other direction of rotation, according to another embodiment of the invention, the stop surface associated with the rotatable disk support cam is provided with a pivotable joint part. It is formed by a radial control surface of a surrounding sector notch.

In order to avoid clamping and forcing forces, it is advantageous for the fitting to be symmetrical with respect to the longitudinal direction of the pivot axis, so that the pivotable coupling part is laterally connected to this coupling part. Advantageously, it is arranged between two rotatable disks which are in contact with each other, each of which is provided with a pawl and a control lever, which disks together with a rockable joint part are provided on a rocking shaft. Each of the rotatable disks supported by the eccentric ring has a spur gear.
It meshes with the internal ring gear of the shell which is arranged on both sides and forms the fixed joint part. In this case, the shells forming the fixed joint part are connected to one another by two spaced-apart pieces below the pivot axis provided therein, which are spaced apart from each other. It is used as a stop for a contact cam located on a rotatable disk, which limits the adjustment process of the backrest.

〔Example〕

Embodiments of the present invention are shown in the drawings and are described in detail below.

In the embodiment shown in FIGS. 1 and 2, the fixed joint part 10 consists of two lower halves 10 'and 10 "spaced apart from one another, these lower halves being spaced apart.
Connected to each other via a lower half 10 'and
A support bush 13 is fixed in the range of the joint hole of 10 ", and concentric portions 15 and 16 of a swing shaft 14 are supported on the support bush. The fixed joint portion 10 also has a belt pivot sleeve 11. This belt pivot sleeve is fixed to the lower halves 10 'and 10 "below the spacing piece 12. Concentrically with respect to the supporting bush 13 of each lower half 10 'or 10 ", these lower halves each have an internal ring gear 17. Between these lower halves 10' and 10" Two shell halves 20 '
And a rotatable disc 20 formed of a rolling bearing 21 made of, for example, a needle bearing.
And the bushing 22 are supported by the eccentric ring portions 23 and 24 of the swing shaft 14. The eccentric portions 23 and 24 are arranged between the concentric portions 15 and 16 of the swing shaft, and in this case, the eccentric portion 2
3 is formed in a cylindrical shape, and the eccentric ring portion 24 is formed in a truncated conical shape. The bushing 22 has holes that match the eccentric portions 23 and 24, which are chamfered to create a slight play at the peripheral portion opposite the eccentric distance. . In order to eliminate play, the rocking shaft is arranged so that it can be automatically moved in the axial direction by a spring member 25, for example, configured as a disc spring. Swing axis
A spur gear 26 is integrally formed on the shell halves 20 'and 20 "concentrically with the 14 eccentric portions 23 and 24, respectively, and this spur gear is formed by the eccentric portions 23 or 24 of the fixed joint portion 10. Meshed with the internal ring gear 17. In this case, the spur gear
As is well known, at least one tooth is different between the toothed portion 26 and the toothed portion of the internal gear 17, and the tip diameter of each spur gear 26 is the root diameter of each internal gear 17. Less than the height of at least one tooth, in which case the eccentricity corresponds to the difference between the two diameters.

Between the shell halves 20 ′ and 20 ″ of the rotatable disc 20, a rockable joint part 27 provided on the needle bearing 21 penetrates, which in the embodiment shown is parallel. The pivotable joint part 27 is formed of two adjacent plates, and is pivotally connected to the rotatable disk 20 via a pivoting device, the pivoting device comprising: A jaw 29 is provided on each side of the movable joint portion 27 and supported by a projection 28 fixedly connected to the joint portion 27, and the saw teeth 30 of the jaw Cut into the toothed portion 31 of the shell halves 20 'and 20 "forming With 29 claws,
Swingable joint part via a pin 32 fixed to it
On both sides of 27, the pivot pins of this pivotable joint part 27
A control lever 34 arranged on 33 is engaged. In this case, each control lever 34 has an elongated hole-shaped control curved surface 35 surrounding the pin 32, and the control curved surface includes a separation track 36 inclined radially inward with respect to the shaft pin 33 and extending inward. Following this separation track, a clamping track 37 that inclines in the radial direction with respect to the shaft pin 33 and extends inward is provided. In this case, the intersection range between the separation track and the tightening track is a restraining preparation portion 38. To form A tension spring 39 acts on the projection of the control lever 34 above the shaft pin 33, and the control lever 34 is swung by these tension springs to automatically restrain the claw 29. In addition, a tension member 40, for example in the form of a cable, shown in phantom in FIG. 1 acts on the control lever 34, by means of which the control lever 34 is moved into the release position against the action of the tension spring 39. Can be swung, thereby simultaneously nailing via pin 32
29 is swung to the position where the gear cutting part 31 is released.

The swingable joint part 27 has two stop surfaces 41 substantially diametrically opposed in the joint hole area, and these stop surfaces are in contact with the arc-shaped support cam 42 in the case of restraint. These support cams are mounted on the periphery of the inner surfaces of the shell halves 20 'and 20 "forming the rotatable disc 20. To limit the forward rocking movement of the rockable joint part 27 First, the stopper surface 43 of the notch 44 in the joint hole area of the joint portion 27 is used.

In order to create a play-free connection between the pivotable coupling part 27 and the rotatable disk 20, a slightly elongated hole 45 in the pawl can be seen in FIGS. 3 to 6. In addition, it surrounds a projection 28 fixed to a swingable joint portion 27.

The shell halves 20 'and 2
Z-shaped retaining pieces 46 are used which are arranged on the outer surfaces of the 0 "and partially engage the lower halves 10 'and 10" in the region of the upper joint bore. The intermediate area of the stud 47 for fixing the holding pieces 46 on the shell halves 20 'and 20 "in addition to the clamping pins is the joint part
It passes through a long hole 48 in 27.

1, 5 and 6, when the joint portion 27 is connected to the rotatable disk 20, the tilt of the backrest is adjusted by the rotation of the swing shaft 14. For example, as can be seen from FIG. 2, a gear 49 is connected so as not to rotate relative to the steering wheel, and this gear can be connected to a steering wheel or an electric motor via, for example, an intermediate gear. In order to limit the adjusting movement of the backrest tilt, contact cams 50 are respectively formed integrally with the shell halves 20 ′ and 20 ″ forming the rotatable disc 20 in the lower joint hole area, The cam can contact the spacing piece 12 to limit the rocking movement.

FIG. 3 shows the position of the coupling part 27 with respect to the disk 20 formed from a shell half, which corresponds to the forward swinging position of the backrest. In this position, the tension member 40 causes the control lever 34 to swing clockwise around the shaft pin 33, thereby controlling the control surface 35 of the control lever 34.
The claw 29 is swung to the disengagement position which can be seen from FIG. 3 through the separation track 36 of the claw 29 and the pin 32 fixed to the claw 29. It is above the swinging circle of the cutting portion 31. In this case, the forward swing of the swingable joint portion 27 is limited by the contact of the stopper surface 43 of the front support cam 42 of the disk 20. The disk 20 is fixed in position by the above-mentioned staggering transmission device used for adjusting the backrest unless the swing shaft 14 is operated. In the retracted position of the coupling part 27, which can be seen in FIG. 4, the stop surface 41 of this coupling part 27 is already in contact with a support cam 42 which is fixedly connected to the rotatable disc 20. Claw 29 sawtooth
30 has not yet entered the gear cutting portion 31 of the disk 20. This is because the control lever 34 is still in a counterclockwise oscillating motion caused by the tension spring 39, in which the claw 29 is rotated counterclockwise around the projection 28 by the separation track 36 and the pin 32. Has been rotated. In this case, the slot 45 comes into contact with the front area of the projection 28 at a position opposite to the position known from FIG.

5, the saw teeth 30 of the pawl 29 are loosely engaged with the toothed portions 31 of the rotatable disc 20 formed by the shell halves. This is because the pin 32 is in the restraint preparation portion 38 of the control curved surface 35 of the control lever 34. In this position, there is still a slight play between the saw tooth 30 and the toothed section 31, but this play is further eliminated by the action of the tension spring 39. Because these tension springs cause the control lever 34 to pivot further about the shaft pin 33 in a counterclockwise direction, the pin 32 reaches the area of the clamping track 37 of the control surface 35, whereby the gear cuts 30,31
Between the stop surface 41 of the pivotable joint part 27 and the support cam 42 of the disk 20 formed of a shell half on the other hand. The position of the rocking device as seen from FIG. 6 corresponds to the position shown in FIG.

As already mentioned, the above-described embodiments are merely examples of the present invention, and the present invention is in no way limited thereto.
Rather, various modifications and alternative arrangements of the invention are possible. All new features described herein or shown in the drawings are important to the invention, even if they are not claimed in the claims.

[Brief description of the drawings]

FIG. 1 is a side view of a fitting according to the present invention, and FIG.
FIG. 3 is a cross-sectional view of the fitting shown in FIG. 1 taken along the line II-II of FIG. 1; FIG. 3 is swung forward with respect to the rotatable disk when the pawl is opened; FIG. 4 is a schematic side view of a rocking device having a coupling part attached to the backrest, FIG. 4 is a schematic side view of the coupling part attached to the backrest in a position corresponding to a use position when the pawl is still opened,
FIG. 5 is a schematic side view of a joint portion which is connected to a rotatable disc via a pawl in a use position, and FIG. 6 is a diagram in which a control lever is rotatable with a joint portion attached to a backrest. FIG. 3 is a schematic side view of the coupling part in a coupling position with a rotatable disk which has been swung to a position where it is coupled without play to one another. 20: disk, 27: swingable joint, 29: claw, 34
…… Control lever, 35 …… Control surface, 36 …… Separation trajectory, 37
…… Tightening track, 38… Restriction preparation part, 41… Stopper surface, 42… Support cam

Claims (6)

(57) [Claims] 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 a movement for determining a mutual position of both joint parts. A locking device is provided, wherein one of the moving components is configured as a disk rotatable with respect to a rockable joint portion to form a rocking device. Has a toothed part on the outer circumference, which engages a pawl on the pivotable joint, which can be operated for release and returned for restraint Fitting for a seat having a movable and swingable backrest engaged with a suitable control lever, having a separation track (36), a restraint preparation part (38) and a clamping track (37). Control lever (34) with control surface (35)
Acts on the pawl (29), which is provided on the pivotable joint part (27) so as to be able to be displaced in a limited manner, and in the case of restraint, the stopper surface (41) of the joint part (27). ) Is fastened toward the support cam (42) of the rotatable disk (20). 2. A supporting portion of the pawl (29) is formed by a projection (28) fixed to a swingable joint portion (27) and an elongated hole (45) surrounding the projection. The joint fitting according to claim 1, wherein: 3. A constrained portion (38) of the control curved surface (35) is formed by an intersection of the separation track (36) and the tightening track (37), and the separation track (36) is swingable. The control lever (34) provided at the joint part is inclined inward in the radial direction with respect to the rotation axis (33) of the control lever (34) and extends inward. The joint fitting according to claim 1, wherein: 4. A stopper surface (43) attached to a support cam (42) of a rotatable disk (20) is provided on a swingable joint portion (2).
4. A fitting according to claim 1, wherein the bracket is formed by a radially limiting surface of a sector notch (44), which allows a forward swinging movement, around the circumference of (7). . 5. A swivelable joint part (27) abuts on the sides of the joint part to form a rotatable disk (20).
Are arranged between two shell halves (20 ', 20 "), each of which has a pawl (29) and a control lever (34), and the disc (20) swings. Possible joint parts (27)
And the rotatable shell halves (20 ′, 20 ″) supported by the eccentric wheels (23, 24) of the swing shaft (14) have spur gears (26), respectively. , Lower half (10 ′, 1) arranged on both sides to form a fixed joint part (10)
The joint fitting according to any one of claims 1 to 4, characterized in that the fitting is engaged with the ring gear (17 "). 6. The lower halves (10 ', 10 ") forming the fixed joint part (10) are spaced apart from each other below a pivot shaft (14) provided therein. It is connected to each other by two spacers (12), which are used as stops for a contact cam (50) arranged on a rotatable disc (20), which limits the adjustment process of the backrest. The joint fitting according to claim 5, wherein the fitting is attached.