DE102006056004B4 - Articulated fitting for motor vehicle seats with at least two locking arms - Google Patents

Abstract

Articulated fitting for motor vehicle seats - having a hinge axis (20), - with an actuating part (36) which is movable between a blocking position and a release position, - with a first hinge part (24) having an internal toothing (28) which is centric to the hinge axis (20) is, - with a second hinge part (30) which is rotatable in the release position of the actuating part relative to the first hinge part (24) about the hinge axis (20) and in a locking position of the actuating part not relative to the first hinge part (24) movable with at least one left-handed locking arm (32, 33) and at least one right-hand locking arm (34, 35) each having a toothed area (38) which cooperates with the internal toothing (28), each around a locking arm axis (56) are pivotally mounted, which is arranged on the second hinge part (30), and each having actuating portions (42) which cooperate with the actuating part (36), - wherein in the locking position Operating member (36) the tooth portions (38) of the locking arms (32-35) in engagement with the internal teeth (28) biased and holds, but in the release position, the actuating part (36) the tooth portions (38) of the locking arms (32-35) not is biased in engagement with the internal toothing (28), all locking arms (32-35) are free of the internal toothing and an adjustment of the first joint part (24) relative to the second joint part (30) is possible, characterized in that an elastic means (80 ), which is supported on the one hand on a left-handed locking arm (32, 33) and on the other hand on a right-handed locking arm (34, 35), and in that this elastic means (80) the tooth region (38) of the left-handed locking arm (32, 33) elastically biased towards the internal toothing (28) and the tooth portion (38) of the right-handed locking arm (34, 35) resiliently biased to the internal toothing (28) out.

Description

The invention relates to a hinge fitting for motor vehicle seats according to the preamble of patent claim 1.

Such a hinge fitting is made FR 1 537 284 A known. The previously known hinge fitting is constructed essentially mirror-symmetrically. He has a left-handed and a right-handed barrier arm. These are identical. They are each pivotable about a pivot axis. The pivot axes have a round cross-section and are located near the internal teeth. The toothed area opposite the locking arms each have an operating area. At the operating areas is an actuating part, which is designed as a slide and has approximately the shape of a pentagon. The operating part is moved by a hand lever. By moving the operating part, which is guided in a longitudinal guide, the two locking arms are blocked or released. A spring is provided which engages the hand lever and biases the actuating member to urge the locking arms into the locking position.

Regardless of the direction of an externally applied torque is always a locking arm optimally in use. The arresting forces occurring at its tooth area are introduced essentially directly into the locking axle.

In addition, reference is made to W02005 / 044617 A1 . EP 1 260 405 A1 and DE 32 11 158 A1 , Such hinge fittings have fundamentally reinforced. However, it has been shown that such hinge fittings do not always work precisely, in particular the engagement of the tooth portion in the internal teeth is not always accurate.

From the US 5,881,854 A a drive device for the adjustment of a joint of a motor vehicle seat is known. It has a left-handed and a right-handed barrier arm. At the beginning of a drive movement of one of the two locking arms is first brought out of engagement with internal toothing, namely the locking in the drive direction locking arm, while the other locking arm remains engaged.

This is where the invention starts. It has set itself the task to further develop the hinge fitting of the type mentioned in that a precise engagement of the tooth portions is achieved in the internal teeth, regardless of the relative position of the joint parts to each other and regardless of the respective process during locking.

This object is achieved by an article having the features of patent claim 1.

In contrast to the hinge fitting of the type mentioned, the locking arms are constantly biased by the elastic means in its locking position. This will help you find your way into their respective locked position. The insertion is separated from the locking, the insertion takes place under the action of the elastic means, the locking under the action of the operating part. In a locking operation, starting from the release position, the following operations take place: The elastic means presses the locking arms into the locking position before the actuating part is pivoted so far that it itself can cause this movement of the locking arms. The operating part is used only to complete and secure the locking position of the locking arms. The blocking position is thus achieved in two steps. First, the elastic means moves the locking arms in their locked position, then this is mechanically secured and held by the actuating part. Only the operating part is able to set the locking arms so that accidental loads can be absorbed, the elastic means is not able to do so. The elastic means is only designed so that it can move the locking arms into their locking position, an elastic force beyond this does not have the elastic means.

In a preferred embodiment, the actuating member for each locking arm each having an arm which is associated with the respective locking arm and the locking arms each have a release edge, which cooperates with this associated arm. The release arm actively moves the blocking arm out of a blocking position. This movement takes place against the force of the elastic means.

The release edge and the associated arm are designed so that, although a free pivoting of the locking arm is reached from its locked position, in a return movement into the locked position of the locking arm but can move freely under the influence of the elastic means and is free of the release edge, as soon as the actuating part is brought from the blocking position to an intermediate position. From this intermediate position it must be moved further to get into the blocking position. Before it is moved from this intermediate position to the blocking position, the elastic means has already moved the locking arms into the blocking position. These can thus find themselves free from the arm in the correct locking position.

Only an elastic means is necessary and provided to preload two locking arms elastically in the locking position. The elastic means can be conveniently placed between the two Arrange locking arms. It requires no additional space or space. The two locking arms are preferably in the immediate vicinity of each other or immediately adjacent.

If the Sperrarmachse is relatively close to the internal teeth and the other geometric relationships are observed, regardless of the direction of rotation is always at least one locking arm selbstarretierend. In both directions of rotation is a mixing behavior, because at least one locking arm is independent of the direction of an attacking torque in an automatic, preferably self-locking state and only the other at least one other locking arm of the other genus must be held by the actuating member in its locked position. The hinge fitting therefore behaves independently of the direction of rotation with respect to externally applied torques.

The number of locking arms is adapted to the requirements. It is quite possible and preferred to provide more than two locking arms. The minimum of the number of locking arms is two. For example, if three locking arms are used, two may be left-handed and one right-handed or vice versa. The number of right-handed locking arms, which is at least one, is equal to or different from the number of left-handed locking arms, of which also at least one is also provided in each case. If an odd number of locking arms is provided, a locking arm is acted upon separately from its own spring as an elastic means.

In operation, the pivot angle of the locking arm between the locking position and the release position is relatively low. The swivel angle is less than 5 degrees.

The pivot point of the locking arm is as close as possible to the internal toothing. The positioning of the pivot point in the vicinity of the internal toothing has the advantage that there are favorable geometrical conditions when pivoting the toothed area into the internal toothing and also when swiveling out. Undercuts are avoided.

Preferably, the first hinge part and the second hinge part define a space in which the locking arms, the operating part and the elastic means are located and which has the shape of a flat cylinder. For the elastic means no additional space is needed, it is placed in the space between two barrier arms. It preferably does not require its own holder, but is defined in recesses. It can be easily mounted, in particular by plugging.

• 1: eine perspektivische Darstellung in Form eines Montagebildes eines Gelenkbeschlags,
• 2: eine Draufsicht auf einen montierten Gelenkbeschlag im Sinne der Pfeile II-II in 1 und gespiegelt, der Gelenkbeschlag entspricht bis auf das elastische Mittel demjenigen nach 1, er ist im Sperrzustand,
• 3: eine Draufsicht wie 2, jedoch für eine dritte Ausbildung, wiederum im Sperrzustand, und
• 4: die Draufsicht wie 3, jedoch nunmehr in der Freigabeposition.

Further advantages and features of the invention will become apparent from the other claims and the following description of a non-limiting embodiment of the invention, that under-BeBezugnahme to the drawings will be explained in more detail below. In this drawing show:

• 1 : a perspective view in the form of a mounting pattern of a hinge fitting,
• 2 : A plan view of a mounted hinge fitting in the direction of arrows II-II in 1 and mirrored, the hinge fitting corresponds to the one to the elastic means 1 he is in a locked state
• 3 : a top view like 2 , but for a third training, again in the locked state, and
• 4 : the top view like 3 , but now in the release position.

In the following, in particular, the first embodiment will be after 1 together with the second embodiment according to 2 discussed, the third embodiment according to the 3 and 4 is discussed only in so far as it differs from the other embodiment.

Like from the 1 and 2 it can be seen, the hinge fitting has a hinge axis 20 centered on an axis line 22 is. The hinge axis 20 is hexagonal in cross section. Furthermore, a first joint part 24 provided, which is substantially a circular disk in the embodiment shown. A blank in the form of a circular disk is processed, in particular embossed, that a central area opposite to an edge region 26 is offset. This is an internal toothing 28 formed the edge area 26 limited to the inside. In addition, a second joint part 30 provided, which is also designed substantially in the form of a circular disk. Both joint parts 24 . 30 have means to connect them to parts of a motor vehicle seat (not shown) to be adjusted against each other. This will be discussed later. Both joint parts 24 . 30 when assembled, they define a cavity substantially in the shape of a flat cylinder. In this cavity are three locking arms 32 . 33 . 34 and an operating part 36 , as well as other parts to be discussed.

Of the three barrier arms 32 . 33 . 34 are two identical, namely the left-handed locking arms 32 . 33 , The barrier arm 34 is right-handed and has a slightly different education. Every barrier arm 32 - 34 each has a tooth area 38 , of the internal toothing 28 is adjusted. The tooth area 38 extends about 35 degrees, as seen from the axis line 22 , and has a variety of teeth, in particular the 2 and 3 demonstrate. In the right-handed barrier arm 34 is the tooth area 38 at one end of the locking arm, which is in the assembled state in the clockwise direction. In the left-handed barrier arm is the tooth area 38 at one end of the locking arm, which is in the mounted state in the counterclockwise direction of rotation.

Overall, a locking arm claimed a sector of about 80 degrees, so that a total of four locking arms in the embodiment shown can be accommodated in principle, see 3 and 4 , Offset to the tooth area 38 Everybody has a barrier arm 32 - 34 a storage 40 who in the trainings after the 1 and 2 on the one hand a hole and on the other hand out of round, it has triangular shape with rounded corners and convex side lines. In training after the 3 and 4 is the storage than for internal toothing 28 open recess or bay and is limited by a circular arc. After all, everyone has a blocking arm 32 - 34 an operating area 42 , To the operating area 42 on the one hand belongs a clamping edge 44 and a release flank 46 ,

The actuating part 36 has a hexagonal hole, that of the hinge axis 20 is adjusted. With this hinge axle 20 is it connected. The actuating part 36 has three arms in the embodiment shown 48 . 49 . 50 namely for each barrier arm 32 - 34 an arm. Adapted to the barrier arms, there are two identical first arms 48 . 49 and a second arm 50 , The latter works with the right-handed barrier arm 34 together. It can be seen that the clamping flanks 44 the barrier arms 32 - 34 essentially coincide and lie on the same radius, but the release flanks 46 differ. Accordingly, the respective adapted arms differ. These have flanks that flanks 44 . 46 assigned. This is especially true of the clamping state, as in 2 and 4 is shown, there are the clamping flanks 44 active, and from the release state, as in 3 is shown, can be seen. In training after the 3 and 4 has the operating part 36 a hole in the shape of a pair of twigs with rounded, short sides.

As can be seen from the figures, the arms grab 48 - 50 similar to a head in recesses, each in the locking arms 32 - 34 are formed, and form a kind of joint.

Between the two barrier arms 33 and 34 , which are different genus, there is a space that is approximately V-shaped. In this space is an elastic means 80 in the form of a compression spring ( 1 ) or in the form of a leg spring ( 2 ) arranged. The elastic means 80 in each case relies on support points 82 from, which are designed as a recess. This will be the elastic means 80 also fixed in each case. The two opposite support points 82 lie on a straight line that extends radially within a connecting line through the Sperrarmachsen 56 of the two barrier arms involved 33 . 34 located. The trained as a compression spring elastic means 80 thus pushes the tooth areas of the two locking arms 33 . 34 in the engaged position.

In the third embodiment, the elastic means 80 also a helical compression spring, but now between two adjacent faces 84 the barrier arms 33 . 34 respectively. 32 . 35 arranged. The recesses 86 in the support points 82 are so deepened that in the locked state ( 3 ) the compression spring is received in them about halfway, in the release state ( 4 ) is the compression spring practically exclusively in the recesses 86 ,

The two-edge of the operating part 36 has an angular position of about 45 ° to a connecting line of the two elastic means 80 ,

In all embodiments, the elastic means 80 so small and formed in spaces between the barrier arms 32 to 35 arranged that no additional space is needed.

Starting from the position according to 4 the actuating part 36 twisted slightly counterclockwise, the release flanks can 46 to 51 glide outward along your arms, keeping you in touch with your arms. In an intermediate state, which is not drawn, are the locking arms 32 to 35 engaged, so in the position according to 3 , the actuating part 36 but is still in contact with them. Starting from this intermediate state now leads a further rotational movement of the operating part 36 to that it is from the release flanks 46 to 51 solve and position according to 3 occupies. It acts with the clamping edges 44 together and holds the engaged position. The actuating part 36 has game in its two-edged, so that it is within the four clamping flanks 44 can position optimally.

Instead of a compression spring can also be a tension spring as an elastic means 80 be used. It is crucial that the elastic means 80 the two locking arms, which it acts on, each elastically biased in the direction of engagement of the locking arms.

By a rotary movement of the operating part 36 Clockwise all locking arms come simultaneously 32 - 35 from the internal teeth 28 free. By a rotational movement of the joint axis 20 in the opposite direction the arms reach 48 - 50 on the described intermediate position on the respective clamping edges 44 , this will get all locking arms 32 - 35 in the locked position.

It is a feather 52 provided in the execution according to the 1 to 3 by two identical, corrugated springs 52 is realized. It loads the operating part 36 elastically so that it is turned to the locked position. Alternatively, the spring is not present and the polygon is loaded by a spring so that it is the actuating part 36 turns into the locked position.

As can be seen from the figures, the locking arms 32 - 35 and the operating part 36 designed as flat stampings, in particular they are made of sheet steel, but it can also be sintered parts. In any case, their height is such that they fit into the cavity passing through the two hinge parts 24 . 30 is limited. In the comments after the 1 and 2 are also the two wavy feathers 52 and the elastic means 80 made so flat that they fit in the said space. The feathers 52 supported on the one hand in notches, which in the operating part 36 are provided. On the other hand, they are based on distinct elevations 54 from the second joint part 30 projecting into the cavity and with an outer, rounded edge in the immediate vicinity of the internal teeth 28 lie, see 2 , This will cause the mutual positioning of the joint parts 26 . 30 each other and facilitates the assembly of the fitting.

At the second joint part 30 are Sperrarmachsen 56 provided in the bearings 40 to grab. They are designed as cones. In 1 and 2 they have a triangular cross-sectional area, this acts with the storage 40 together. This too has a substantially triangular shape. Triangle is always understood here to mean a triangle with rounded corners and outwardly curved triangular sides, as can be seen from the figures. Warehousing 40 has, in particular the 2 and 3 show, locally and deliberately an oversize compared to the triangular cross-section of Sperrarmachsen 56 , thereby a pivoting movement is made possible by the described small pivoting angle. One of the round corners of the triangle forms a projection 60 , This is located near the internal teeth, he is still from the tooth area 38 relatively far away. The pivoting movement of the respective blocking arm 32 - 34 is essentially by this projection 60 determines, the locking arms pivot about a pivot axis 62 , in the 2 indicated by a dot. The cross-sectional shape of the Sperrarmachse 56 and the appropriate form of storage 40 are chosen so that in the locked state of the joint ( 2 or 4) as large as possible support between Sperrarmachse 56 and storage 40 takes place, which also extends over the largest possible distance across a straight line through the pivot axis 62 and through the tooth area 38 runs. In other words, in the blocking case, the blocking force should possible over a large contact surface of the blocking arm 32 - 34 on the Sperrarmachse 56 be transmitted.

In the third embodiment, the Sperrarmachsen 56 round. They, too, have a lower standard than the bearings 40 , This allows the locking arms 32 - 34 each optimally in the internal toothing 28 arrive. Warehousing 40 is for internal toothing 28 open. The barrier arm axis 56 is located relatively close to the internal teeth 28 , Between Sperrarmachse 56 and internal teeth 28 an air gap of less than four, preferably less than 3 mm remains.

1 finally shows that of the two joint parts 24 . 28 formed housing by an outer ring 64 is completed to the outside. This ring holds the two pivoting parts 24 . 30 together. He keeps them in position both in the axial direction and in the radial direction. The ring 64 is crimped or otherwise deformed to fulfill its function.

The fitting is preferably intended for the connection of a seat frame with a backrest, ie as a so-called backrest fitting. 1 shows how the connection to the other parts of the seat structure (not shown) can take place. As in 1 it can be seen are the Sperrarmachsen 56 provided with threaded areas or extended by them. The threaded areas are in the mounted state outside of the second joint part 30 in front. On these supernatants, a structural part, such as a seat support, attached. The connection is made by means of nuts 66 , Likewise, the first joint part 24 attached, for example, on the backrest. The first joint part 24 has six knob-like characteristics 68 , which engage in corresponding holes of the back frame (not shown) and provide for a better transmission of torque. The actual connection is made by three bolts 70 and associated nuts 72 ,

It is also possible on a Sperrarmachse 56 at the same time a left-handed barrier arm 32 and a right-handed barrier arm 34 to arrange, then in the opposite direction of the Sperrarmachse 56 protrude.

LIST OF REFERENCE NUMBERS

20

joint axis

22

axle line

24

1. joint part

26

border area

28

internal gearing

30

2. joint part

32

Barrier arm (left-handed)

33

Barrier arm (left-handed)

34

Barrier arm (right-handed)

35

Barrier arm (right-handed)

36

actuating member

38

posterior region

40

storage

42

operating range

44

clamping edge

46

release edge

48

Arm (1st arm)

49

Arm (1st arm)

50

Arm (2nd arm)

51

Arm (2nd arm)

52

feather

54

survey

56

Sperrarmachsen

60

head Start

62

swivel axis

64

ring

66

mother

68

shaping

70

bolts

72

mother

80

elastic agent

82

support point

84

face

86

recess

Claims (17)

Articulated fitting for motor vehicle seats - with a hinge axis (20), - with an actuating part (36) which is movable between a blocking position and a release position, - with a first hinge part (24) having an internal toothing (28) which is centered to the hinge axis (20) is, - with a second hinge part (30) which is rotatable in the release position of the actuating part relative to the first hinge part (24) about the hinge axis (20) and in a locking position of the actuating part not relative to the first hinge part (24) movable with at least one left-handed locking arm (32, 33) and at least one right-hand locking arm (34, 35) each having a toothed area (38) which cooperates with the internal toothing (28), each around a locking arm axis (56) are pivotally mounted, which is arranged on the second hinge part (30), and each having actuating portions (42) which cooperate with the actuating part (36), - wherein in the Sperrstellun g the actuating member (36) biases and holds the tooth portions (38) of the locking arms (32-35) in engagement with the internal teeth (28), but in the release position the actuating member (36) engages the tooth portions (38) of the locking arms (32-35) ) are not biased into engagement with the internal toothing (28), all locking arms (32-35) are free of the internal toothing and an adjustment of the first joint part (24) relative to the second joint part (30) is possible, characterized in that an elastic means (80) which is supported on the one hand on a left-handed locking arm (32, 33) and on the other hand on a right-handed locking arm (34, 35), and in that this elastic means (80) the tooth region (38) of the left-handed locking arm (32, 33) elastically biased toward the internal toothing (28) and the tooth portion (38) of the right-handed locking arm (34, 35) resiliently biased to the internal toothing (28) out. Joint fitting according to Claim 1 , characterized in that the two locking arms (32, 35, 33, 34) are adjacent. Joint fitting according to Claim 1 or 2 , characterized in that the Sperrarmachsen (56) of the two locking arms (32, 35, 33, 34) have a greater distance from each other than the tooth portions (38) of the two locking arms (32, 35, 33, 34). Joint fitting according to Claim 1 characterized in that the two locking arms (32, 35; 33, 34) each have end faces (84) facing and immediately adjacent to each other, and in that the elastic means (80) is disposed in the end faces (84). Joint fitting according to Claim 1 , characterized in that the actuating part (36) for each locking arm (32, 35, 33, 34) each having an arm (48 - 51) associated with the respective locking arm (32, 35, 33, 34), and that the blocking arms (32, 35, 33, 34) each have a release flank (46) have, which cooperates with the associated arm (48 - 51). Joint fitting according to Claim 1 characterized in that the elastic means (80) is a compression spring or a tension spring and that these at a first support point (82) on the left-handed locking arm (32, 35) and at a second support point (82) on the right-hand locking arm (33, 34) attacks. Joint fitting according to Claim 6 , characterized in that the first support point (82) and the second support point (82) in each case a recess (86) are formed. Joint fitting according to Claim 1 , characterized in that the elastic means (80) is located entirely within a cylindrical space defined by the internal toothing (28). Joint fitting according to Claim 1 , characterized in that the elastic means (80) is in the same plane as the locking arms (32, 33) and the actuating part (36). Joint fitting according to Claim 1 , characterized in that the first hinge part (24), the second hinge part (30) and the actuating part (36) are each flat sheet metal parts, in particular embossed sheet metal parts. Joint fitting according to Claim 1 characterized in that the actuating member (36) has arms (48 - 51) facing the locking arms (32 to 34) and at least one first arm (48) for the at least one left - handed locking arm (32) and at least a second Arm (50) for the at least one right-handed barrier arm (34) are provided. Joint fitting according to Claim 11 , characterized in that the first arm (48) has a different shape than the second arm (50). Joint fitting according to Claim 1 , characterized in that the actuating part (36) with play about the non-circular hinge axis (20) is pivotally mounted and that the actuating part (36) rests in the locked state of the hinge fitting on all locking arms (32-34) with approximately the same contact force. Joint fitting according to Claim 1 , characterized in that the Sperrarmachsen (56) threaded portions and that these threaded portions protrude in the assembled hinge fitting to the outside, outside of the second hinge part (30). Joint fitting according to Claim 1 , characterized in that the hinge parts (24, 30) are substantially disc-shaped and that a ring (64) is provided, which surrounds the outer edges of these hinge parts (24, 30) and holds the hinge parts (24, 30) together. Joint fitting according to Claim 1 , characterized in that the locking arms (32-34) have a bearing (40) and that the bearing (40) is either closed or is open towards the internal toothing (28). Joint fitting according to Claim 1 characterized in that the first hinge part (24) and the second hinge part (30) define a space in which the locking arms (32-34), the actuating part (36) and the elastic means (80) are located and which is the mold a flat cylinder has.

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