EP3569107A1 - Hinge with a defined pressure-point - Google Patents

Abstract

Swivel joint (1) for adjusting a functional part of a furniture with a mounting lever (2) and a pivot lever (5), wherein the mounting lever (2) and the pivot lever (5) against each other from a starting position to an end position about a pivot axis (6) in a Adjusting direction (E) are pivotally connected, wherein the pivot lever (5) by a blocking positive engagement of a locking mechanism (19) against pivoting in the return direction (R) is locked, wherein the locking mechanism (19) has a locking cam (16) and a in a direction relative to the locking cam (16) rotatable sprocket (12) and wherein the locking cam (16) of an engaged with the sprocket (12) detent position in a disengaged from the sprocket (12) located release position and back is adjustable. In order to reduce the design effort and costs and to make the handling more comfortable, it is provided that against the restoring force of a Sicherungsfedermittels (28) adjustable safety cam (27) is provided and that the safety cam (27) in the securing position accidental adjustment of the Locking cam (16) of the detent position in the release position obstructed and releases in the release position, an adjustment of the locking cam (16) from the detent position to the release position and that the safety cam (27) by adjusting the pivot lever (5) is adjustable.

Description

The invention relates to a pivot joint for adjusting a functional part, in particular a head part, a foot part or an armrest, a piece of furniture, in particular seat and / or upholstered furniture, with a mounting lever for mounting the pivot joint on the furniture and a pivot lever for carrying and adjusting the functional part the mounting lever and the pivot lever are pivotally connected to each other from a starting position to an end position about a hinge pivot axis in a setting direction, wherein the pivot lever in a plurality of provided between the starting position and the end position locking positions by a blocking positive engagement of a locking against pivoting in the Setting direction opposite return direction is locked, wherein the locking mechanism comprises a locking cam and a rotatable in one direction relative to the locking cam gear and wherein the locking cam by pivoting de s pivot lever is provided by a located in engagement with the sprocket detent position in a disengaged from the sprocket release position and back adjustable.

Swivel joints for adjusting a functional part of a piece of furniture are known in different configurations. In most cases, the pivot joints are used to adjust a headboard, a footboard or an armrest of a chair, which is typically upholstered furniture. The pivot joints have a mounting lever, with which the pivot joints are fixed to the respective furniture. In addition, a pivot lever is provided which carries the respective functional part and pivots the respective functional part about the mounting lever. For this purpose, the mounting lever and the pivot lever about a hinge pivot axis in a setting direction against each other from a starting position to an end position are formed pivotable.

When adjusting the pivot lever relative to the mounting lever in the adjustment direction starting from the starting position successively different locking positions are passed. The user of the furniture adjusts the pivot joint so far or pivots the pivot lever so far in the direction of adjustment until he has set a comfortable position of the corresponding functional part. So that the functional part at least approximately retains this position and does not accidentally zurückverstellt back to the starting position, the pivot lever can only be zurückverstellt to the next locking position. In the locked position, a locking mechanism engages positively and in a blocking manner and thus locks the pivot lever in relation to pivoting in the return direction opposite to the adjustment direction relative to the mounting lever. The locking mechanism is formed by a locking cam and a ring gear, which is rotatable relative to the locking cam. To lock the locking mechanism, the locking cam can engage in the toothing of the ring gear.

In order nevertheless to be able to reset the pivoting lever back into the starting position, the pivoting lever only has to be adjusted in the direction of adjustment up to an end position, whereby the locking cam is brought out of engagement with the toothed ring in a release position. As long as the locking cam is in the release position, the pivot lever can be adjusted in the return direction back to an opposite end position. As a result, the locking cam is then brought back into engagement with the ring gear in the starting position, so that the pivot joint can be adjusted individually in the adjustment direction again to allow the user a comfortable sitting position.

In the known pivot joints, it always happens that the user wants to adjust the pivot lever in the adjustment direction almost into the associated end position, so as to adjust the functional part as far as possible from the initial position in the adjustment direction. In this case, the user can accidentally too far adjust the pivot lever, if he does not pay attention, and so the locking cam from the Adjust the locking position to the release position, so that it is no longer possible to lock the swivel joint. The user must first adjust the swivel joint back into the return direction so as to return the locking cam from the release position into the detent position engaging in the sprocket. Now the swivel joint can be swiveled again by the desired angle in the adjustment direction. To overcome this problem, pivot joints are often provided with an enlarged adjustment range, so that the functional part, already well before the pivot lever reaches the end position in the direction of adjustment, assumes positions that are no longer perceived as comfortable under normal circumstances. The user then has no incentive to fully exploit the adjustment range and therefore runs no risk accidentally to adjust the pivot lever in the end position in the adjustment direction. However, the user must then always adjust the pivot lever quite far, in order to move the pivot lever back in the return direction can. Corresponding pivot joints are therefore structurally complex, cost-intensive and less comfortable to handle.

Therefore, the present invention has the object, the above-mentioned and previously described in more detail pivot joint such and further, that on the one hand, the design complexity and reduced costs and on the other hand, the handling can be made more comfortable.

This object is achieved in a pivot joint according to the preamble of claim 1, characterized in that a against the restoring force of a Sicherungsfedermittels of a securing position in a release position and in the direction of the restoring force of the release position in the securing position back adjustable safety cam is provided and that the safety cam in the Secured securing position accidental adjustment of the locking cam of the detent position in the release position and releases in the release position, an adjustment of the locking cam from the detent position to the release position and that the safety cam is adjustable by adjusting the pivot lever from the securing position to the release position.

By using a spring-loaded via the securing spring means locking cam, a defined pressure point for the adjustment of the pivot lever between the end of the adjustment range and the end position can be provided. If the pivot lever is moved with a small force in the direction of adjustment in the direction of the end of the adjustment, as is typically the case when adjusting the pivot lever and / or carried by the pivot lever functional part, we blocked the adjustment of the locking cam from the detent position to the release position. The positive connection between the locking cam and the safety cam then leads to a clear feedback to the user that the end of the adjustment range has been reached. While in the range of the adjustment of the pivot lever can be adjusted with little force in the direction of adjustment, this force is not sufficient to adjust the adjustment lever further than to the end of the adjustment range. It comes to a positive connection between the locking cam and the safety cam and thus to block the further adjustment of the pivot lever in the adjustment with only a small amount of force.

If, however, the force applied to the pivoting lever in the direction of adjustment is markedly increased, then the securing cam is displaced against the restoring force of the securing spring means from the securing position into the release position. While the safety cam in the securing position, the adjustment, in particular accidental adjustment, the locking cam has hindered or blocked by the pivoting position in the release position by pivoting the pivot lever in the adjustment, the safety cam in the release position is an adjustment of the locking cam from the detent position to the release position free.

The adjustment of the safety cam from the securing position to the release position is carried out by adjusting the pivot lever in the Setting direction and thus as well as the setting of the functional part in the adjustment direction. Thus, the safety cam provides a noticeable pressure point for the user when adjusting the pivot lever. The user can therefore, if he notices the pressure point, decide whether he wants to leave the pivot lever and thus the functional part in the appropriate position in which a zurückverstellen on the locking mechanism of the pivot joint is prevented. However, he may also decide to adjust the pivot lever against the pressure point to deliberately adjust the locking cam from the detent position to the release position to lock the functional part in another position, which in turn is freely adjustable. In this case, the safety cam due to the restoring force of the Sicherungsfedermittels which acts on the safety cam, zurückverstellt from the release position back into the securing position when the locking cam is moved from the release position back into the locked position. Then, the safety cam is again ready to generate a pressure point when the pivot lever is adjusted to the end of the adjustment range.

In a first particularly preferred embodiment of the swivel joint, the locking cam on a engageable with the safety cam tripping sliding surface to adjust by the interaction of the safety cam and the tripping sliding surface of the locking cam in a structurally simple and reliable way the safety cam from the securing position to the release position can. For this purpose, it is useful if the tripping sliding surface is inclined relative to the adjustment direction of the safety cam from the securing position to the tripping position. Then, for example, the locking cam can be at least substantially adjusted or pivoted in a direction perpendicular to the articulation pivot axis and still adjust the safety cam in one direction at least substantially parallel to the joint pivot axis. The trigger surface makes it possible in principle in a comfortable and structurally simple way that the locking cams adjust the safety cam by conditioning the tripping sliding surface of the securing position in the direction of the release position, in particular in the release position can. It is understood that a sufficient force must be transmitted to each other via the corresponding system of locking cams and safety cams, which causes the safety cam in the direction of the release position adjusted and thus releases the adjustment of the locking position to the release position for the locking cam.

Alternatively or additionally, the safety cam may have a tripping sliding surface that can be brought into contact with the locking cam. Due to the interaction of the locking cam and the tripping sliding surface of the safety cam can be adjusted in a structurally simple and at the same time reliable manner of the safety cam from the securing position to the release position. It lends itself in particular to when the tripping sliding surface is inclined relative to the adjustment of the safety cam from the securing position to the release position, so that the locking cam the safety cam by conditioning on the tripping sliding surface of the securing position in the direction of the release position, in particular in the release position adjusted can be. Then, for example, the locking cam can be at least substantially adjusted or pivoted in a direction perpendicular to the pivot axis joint and thereby still adjust the safety cam in one direction at least substantially parallel to the joint pivot axis. The trigger surface makes it possible in principle in a comfortable and structurally simple way that the locking cam can adjust the safety cam by abutment against the tripping sliding surface of the securing position in the direction of the release position, in particular in the release position.

It is particularly preferred in this context if the tripping sliding surfaces of the safety cam and the locking cam for adjusting the safety cam from the securing position to the release position by adjusting the pivot lever in abutment against each other are designed to slide brought together. The cooperating tripping sliding surfaces can then be coordinated so that the adjustment of the safety cam in the Trigger position can be done very reliably and easily. In particular, it is possible to be able to precisely adjust the forces required for adjusting the safety cam.

Both from a functional and constructive point of view, it is particularly preferred if the safety cam between the securing position and the release position and, if necessary, also back in a direction parallel to the joint pivot axis is adjustable. Thus, the pressure point for adjusting the safety cam by adjusting the pivot lever can be adjusted easily and precisely. In addition, the safety cam and the associated safety spring means can be easily and reliably arranged.

In order to build the swivel joint simple, compact and reliable, it makes sense, if the sprocket has a pointing away from the pivot axis outer teeth. Then, the locking cam and the safety cam can be arranged outside the sprocket and also act together outside of the sprocket. This is simple and possible with fewer compromises, because there is sufficient space outside the sprocket for the locking cam and the safety cam.

In order to provide the highest possible flexibility and a very wide adjustment range, the sprocket, in particular endless, may be provided circumferentially around the hinge axis. Thus, the functional part can be set very far and comfortable for the user. Alternatively or additionally, the locking cam may have a toothing corresponding to the toothed rim, which may contribute to a secure and reliable locking of the pivoting lever in the return direction in a certain position within the adjustment range. The more teeth of the locking mechanism intermesh with each other, the higher the forces can be absorbed in principle in the return direction. It is particularly preferable to provide at least one control disk, which is rotatable and detachable at least in sections, together with the ring gear relative to the locking cam. The setting range and the starting position of the swivel joint can then be adjusted via the control disk and, if necessary, varied by replacing the control disk. To adjust the pivot joint, a release stop of the control disk when pivoting the pivot lever in the adjustment in a certain position of the pivot joint can be brought into abutment with the locking cam. A further adjustment of the pivot lever then causes the locking cam is adjusted by the control disk in a disengaged from the sprocket release position. The pivot lever can be pivoted with the locking cam in the release position in the return direction back to the starting position, which has been prevented by the locking cam by the locking engagement of the locking mechanism with the locking cam. Thus, the locking cam from the release position back into the locking position and thus the pivot joint can be adjusted back to the starting position, the control disk still has a locking stop, the pivoting of the pivot lever in the return direction in a certain position of the pivot lever in contact with the locking cam is brought. If the pivot lever is further adjusted in this position in the return direction, the locking cam is returned by the control disk in the starting position in a detent position in engagement with the ring gear.

By using a control disc for adjusting the locking cam from the locking position to the release position and back by pivoting the pivot lever in the adjustment or the return direction, the pivot joint can be adapted very quickly and easily to different requirement profiles. The swivel joint can also remain unchanged in principle. All you have to do is select a suitable control disk or replace the existing control disk with another control disk. This is therefore possible simply and quickly because the control disk is detachably provided on the pivot joint. The built-control disk is also provided at least partially rotatable together with the ring gear relative to the locking cam. Thereby, the control disk can be adjusted by pivoting the pivot lever, at least in a certain adjustment of the pivot lever together with the ring gear and thus against the locking cam. It is thus achieved that the release stop of the control disk when pivoting the pivot lever in the adjustment direction with the locking cam is brought into abutment that the locking cam is adjusted by the rotation of the control disk together with the ring gear in a disengaged from the sprocket release position. While the locking cam is arranged in the release position, the pivot lever can be pivoted in the return direction back to the starting position, wherein the locking cam remains out of engagement with the ring gear, so as not to affect the adjustment of the pivot lever.

In addition, the at least partially common adjustment of the control disk allows the sprocket that passes through an adjustment of the pivot lever in the return direction after reaching the starting position a locking stop of the control disk with the locking cam in a manner in abutment, so that the locking cam by the rotation of the control disk is moved back together with the sprocket from the release position in the starting position in a locking position in engagement with the sprocket. Now, the pivot joint can be set back in the adjustment direction, wherein a certain position of the pivot joint is then positively held against a Zurückverstellen in the return direction, because the locking mechanism, in particular the locking cam and the ring gear, intermesh positively in the corresponding position of the pivot joint. However, an adjustment of the pivot lever further in the direction of adjustment remains possible.

The control disk is thus used in particular for adjusting the locking cam from the detent position to the release position and back. So that's enough Basically, when the control disk rotates in the angular ranges of the pivot lever together with the ring gear in which the adjustment of the locking cam from the detent position to the release position and back is provided. However, this does not mean that the control disc can not be rotatable together with the ring gear over the entire displacement or adjustment angle of the pivot lever.

Depending on how the control disk is formed and arranged in the pivot joint, the setting angle or the adjustment range of the pivot joint can be defined in a simple manner as well as the orientation of the pivot lever to the mounting lever in the starting position. Against the background that a further adaptation of the swivel joint is unnecessary and the control disk can be very easily, quickly, inexpensively and individually finished, so many different swivel joints for very many different applications can be kept without increased manufacturing costs and / or storage costs.

If the locking cam at least partially projecting laterally relative to the ring gear, the release stop and the locking stop of the control disc can be provided on the side opposite the sprocket protruding portions of the locking cam abutting. In this way, a reliable and structurally simple adjustment of the locking cam is ensured by the control disk. A lateral projection of the locking cam relative to the sprocket is preferably to be understood to mean a projection parallel to the joint pivot axis, in particular in the direction of the control disk. Thus, the at least one control disk can interact easily and reliably with the at least one locking cam.

The control disk can be at least partially positively held rotationally fixed relative to the sprocket. The positive connection ensures a reliable interaction between the sprocket and the control disk. In this case, a rotation of the control disk is independent of the ring gear and / or vice versa as required and in areas possible. However, the sprocket and the control disc can not be rotated completely independently of each other. When and for adjusting the locking cam from the detent position to the release position and back the sprocket and the control disc do not rotate independently, but together or together. Nevertheless, it is particularly preferred in terms of reliability and a low-noise adjustment of the pivot joint when the control disk is fixed non-rotatably relative to the sprocket. This means that, with the exception of an existing game, the control disc and the ring gear always rotate together and together when the pivot lever is pivoted about the mounting lever.

For a simple installation of the pivot joint and a simple replacement of the control disk with a reliable integration of the control disk in the pivot joint, it makes sense if a sprocket supporting the sprocket and the control disk on each other and / or inserted into each other. In this case, it is not fundamentally necessary to differentiate between a succession and a nesting, in particular if the attachment of the control disk to the sprocket element is accompanied by an insertion of the sprocket element into the control disk or vice versa. It is further preferred if the sprocket element and the control disk in the circumferential direction comprise a plurality of corresponding groove / spring connections to connect the control disk in different rotational positions with the sprocket element. Thus, one and the same control disk can be mounted in at least two different positions, in particular angular positions, relative to the ring gear. In this case, the setting angle or the setting range of the resulting pivot joint remains the same in particular. However, the orientation of the control disk to the ring gear, the position of the starting position and the position of the pivot lever can be varied relative to the mounting lever in the starting position.

The mounting lever and the pivot lever can be structurally connected to one another easily via an assembly axis, which can be used as needed for a simple and reliable installation of the control disk and the ring gear by the control disk and the ring gear are mounted on the mounting axis. The adjustability of the pivot joint can thereby be ensured, for example, by the fact that the control disk and the ring gear are held rotatably about the mounting axis on this.

In order to be able to reliably hold the ring gear, the control disk and the locking cam in a well-protected manner against external influences, the mounting lever and / or the pivot lever can form a receptacle for receiving the ring gear, the control disk and the locking cam. In this case, in particular, the control disk can be accurately and reliably positioned to the locking cam and / or the ring gear, if the recording are closed on both sides by cover elements. Thus, a more or less closed receptacle for receiving sprocket, control disc and locking cams can be provided simply and conveniently.

In order to securely fix the locking cam in the release position, while the pivot lever is moved in the return direction, the locking cam may be held in the release position of a holding element. It offers the reliability and simplicity, if the retaining element clamps the locking cam or holds by clamping. This is particularly easy and reliable to ensure when the holding element is designed as at least one spring element.

In order to hold the locking cam securely in the release position, it can further be provided that the locking cam has a retaining stop and the spring element is provided so that the restoring force of the spring element, the retaining stop of the locking cam in the release position in abutment with a holding means of the mounting lever and / or Swing lever brings. In other words, the locking cam due the restoring force of the at least one spring means are pressed against a holding means with a holding stop. This corresponding position thus retains the locking cam reliably, without thereby hindering the adjustment of the locking cam from the release position back into the locked position excessively.

Alternatively or additionally, the locking cam may have a Einstellendanschlag, which passes by adjusting the pivot lever in an end position in the adjustment direction for engagement with the mounting lever and / or the pivot lever. In this way, a very stable end position for the pivot lever for adjusting in the adjustment direction is defined. It offers itself from a constructive point of view further, when the locking cam in the end position of the pivot lever in the adjustment direction in abutment with the release stop of the control disk. Then the control disc with the release stop on the locking cam and the locking cam can be supported simultaneously with the Einstellendanschlag on the mounting lever and / or the pivot lever. In other words, the release stop of the control disc presses the locking cam with the Einstellendanschlag against the mounting lever and / or pivot lever.

Similarly, the locking cam may also have a Rückstellendanschlag to rest on the mounting lever and / or the pivot lever when the pivot lever is in an end position in the return direction. In this way, a very stable end position for the pivot lever for the adjustment is defined in the return direction. It offers from a constructive point of view further, when the locking cam in the end position of the pivot lever in the return direction in contact with the locking stop of the control disk. Then the control disc with the locking stop on the locking cam and the locking cam can be supported at the same time with the Rückstellendanschlag on the mounting lever and / or on the pivot lever. In other words, the locking stop of the control disc pushes the locking cam with the Rückstellendanschlag against the mounting lever and / or pivot lever.

For transmission and dissipation of high forces from the pivot lever, the locking cam in the end position of the pivot lever in the adjustment so between the control disk on the one hand and the mounting lever and / or pivot lever on the other hand be clamped. Thus, for example, high forces can be derived from the pivot lever via the control disk and the locking cam on the mounting lever when the pivot lever is pressed into the end position in the direction of adjustment. Alternatively or additionally, for the same reason the locking cam in the end position of the pivot lever in the return direction between the control disk on the one hand and the mounting lever and / or pivot lever on the other hand be clamped. Thus, for example, high forces can be derived from the pivot lever via the control disk and the locking cam on the mounting lever, when the pivot lever is pressed into the end position in the return direction.

Irrespective of this, the control disk between the release stop and the locking stop can define an angular range which decisively determines the setting angle or the setting range of the pivoting lever. In particular, a portion of the angular range is used to provide the release angle and / or trip path for adjusting the locking cam from the detent position to the release position. This release angle or trip can also be referred to as Ausrastwinkel or Ausrastweg, since the corresponding Ausrastwinkel or Ausrastweg used to disengage the locking cam from the sprocket. Another part of the angle range can be used to provide the release angle and / or trip path for adjusting the locking cam from the release position to the locked position. Consequently, this trigger angle or trip can also be referred to as a Einrastwinkel or Einrastweg, since the corresponding Einrastwinkel or Einrastweg used for locking the locking cam in the ring gear. In other words, the two triggering paths or triggering angles occupy two sections, in particular the opposite end sections of the corresponding angular area between the release stop and the locking stop. The angle range in between is then available as a setting angle for adjusting the swivel joint. Thus, by the arrangement of the release stop relative to the locking stop at defined triggering paths or tripping angles very precisely the respective desired setting angle can be adjusted. By contrast, the position of the starting position or the arrangement of the pivoting lever in the starting position can be determined by the arrangement of the locking stop. Alternatively or additionally, the position of the starting position but also be changed, depending on which of several possible, different positions the control disk is connected to the ring gear, if the control disk can be arranged not only in a position to the ring gear.

Fig. 1A-C

ein erfindungsgemäßes Schwenkgelenk in einer perspektivischen Ansicht, in einer Explosionsdarstellung und in einer perspektivischen Ansicht von der gegenüberliegenden Seite,

Fig. 2A-C

ein Detail des Schwenkgelenks aus Fig. 1 in einer Draufsicht, in einer Schnittansicht gemäß der Schnittlinie IIB-IIB der Fig. 2A mit dem Sicherungsnocken in der Sicherungsstellung und in einer Schnittansicht gemäß der Schnittlinie IIB-IIB der Fig. 2A mit dem Sicherungsnocken in der Auslösestellung,

Fig. 3

das Schwenkgelenk aus Fig. 1 in der Ausgangsstellung an einem Ende des Einstellbereichs in einer Schnittansicht,

Fig. 4

das Schwenkgelenk aus Fig. 1 mit dem Schwenkhebel am gegenüberliegenden Ende des Einstellbereichs in einer Schnittansicht,

Fig. 5

das Schwenkgelenk aus Fig. 1 mit dem Schwenkhebel an einer Endstellung in der Einstellrichtung in einer Schnittansicht,

Fig. 6

das Schwenkgelenk aus Fig. 1 mit dem Schwenkhebel an einer Endstellung in der Rückstellrichtung in einer Schnittansicht und

Fig. 7

die Steuerscheibe des Schwenkgelenks aus Fig. 1 in einer Draufsicht.

The invention will be explained in more detail with reference to a drawing showing only one exemplary embodiment. In the drawing shows

Fig. 1A-C

a swivel joint according to the invention in a perspective view, in an exploded view and in a perspective view from the opposite side,

Fig. 2A-C

a detail of the swivel joint Fig. 1 in a plan view, in a sectional view along the section line IIB-IIB of Fig. 2A with the safety cam in the securing position and in a sectional view along the section line IIB-IIB of Fig. 2A with the safety cam in the release position,

Fig. 3

the swivel joint Fig. 1 in the initial position at one end of the adjustment range in a sectional view,

Fig. 4

the swivel joint Fig. 1 with the pivot lever at the opposite end of the adjustment range in a sectional view,

Fig. 5

the swivel joint Fig. 1 with the pivoting lever at an end position in the direction of adjustment in a sectional view,

Fig. 6

the swivel joint Fig. 1 with the pivot lever at an end position in the return direction in a sectional view and

Fig. 7

the control disc of the swivel joint Fig. 1 in a top view.

In the Fig. 1A is a pivot joint 1 in a perspective view and in the Fig. 1B shown in an exploded view. To connect the swivel joint 1 with the furniture, in particular a chair, more preferably with the backrest of a chair, a mounting lever 2 is provided. The mounting lever 2 is rotatably connected to a sprocket element 3, wherein the sprocket element 3 is rotatably mounted on a mounting axis 4. The mounting axis 4 is connected on the one hand to the mounting lever 2 and on the other hand with a pivot lever 5 for mounting a functional part, in particular head part. The connection is provided such that the pivot lever 5 for adjusting the functional part relative to the mounting lever 2 and thus against the sprocket element 3 is pivotable. In this case, in the illustrated and insofar preferred pivot joint 1 of the pivot lever 5 is rotatably supported relative to the sprocket element 3 and about the hinge pivot axis 6 of the pivot joint 1.

On the sprocket element 3, a control disk 7 is attached. For this purpose, circumferentially around the sprocket element 3 and in the illustrated and so far preferred pivot joint 1 also circumferentially around the control disk 7 respectively corresponding grooves 8,9 and 10,11 provided to at least one groove between the control disk 7 and the sprocket element / To provide spring connection in the circumferential direction. Due to the plurality of grooves 8,9 and springs 10,11, the control disk 7 can be pushed in different orientations on the sprocket element 3 and fixed there. The Alignment of the control disk 7 to the sprocket element 3 can also be subsequently changed. For this purpose, the control disk 7 has to be removed from the sprocket element 3 and then rotated by the desired angle. Subsequently, the control disk 7 can be pushed back in the changed orientation on the sprocket element 3. By pushing the control disk 7 on the sprocket element 3, the control disk 7 comes close to the provided circumferentially around the sprocket element 3 ring gear 12 zoom.

The ring gear 12 of the sprocket element 3 and the control disk 7 are received in a receptacle 13 formed by the pivot lever 5, which is closed on both sides by cover elements 14,15. In the receptacle 13 is also a locking cam 16 which has a toothing 17 which can engage with the external toothing 18 of the ring gear 12 in engagement. The locking cam 16 and the ring gear 12 thereby form a locking mechanism 19 to lock the adjustment of the pivot joint 1 in at least one position and in at least one direction. For this purpose, the locking cam 16 between the sprocket 12 and the receptacle 13, in particular the tapered portion of the receptacle 13, clamped form-fitting manner.

Furthermore, a retaining element 20 is arranged in the form of a spring element in the receptacle 13, which can exert a restoring force in the direction of the ring gear 12 on the locking cam 16, such as on the one hand engagement of the locking cam 16 in the sprocket 12 and on the other hand slipping of the locking cam 16 of the ring gear 12 for adjusting the pivot joint 1 to allow. In addition, the locking cam 16 can arrive at a corresponding position of the pivot lever 5 in abutment against the release stop 21 or in contact with the locking stop 22. For this purpose, the locking cam 16 is parallel to the pivot axis 6 and in the direction of the mounting lever 2 approximately opposite the ring gear 12. This protruding region of the locking cam 16 can then come into contact with the control disk 7, in particular with the release stop 21 and the locking stop 22 of the control disk 7.

The locking cam 16 also has a Einstellendanschlag 23, with which the locking cam 16 abuts against the receptacle 13 of the pivot lever 5 under certain circumstances, to block further adjustment of the pivot lever 5 in the adjustment direction. In order to keep the locking cam 16 spaced from the sprocket 12, so that a Zurückverstellen the pivot lever 5 can take place, the locking cam 16 has a retaining stop 24 with which the locking cam 16 can be frictionally pressed against a retaining means 25 of the receptacle 13. In order to block further adjustment of the pivot lever 5 in the return direction, the locking cam 16 is provided with a Rückstellendanschlag 26 which can get into contact with the receptacle 13 of the pivot lever 5 under certain circumstances. The pivoting lever 5, in particular the receptacle 13 or the cover element 14, also has a securing cam 27, wherein the securing cam 27 extends with its free end in the direction of the locking cam 16.

In the Fig. 1C is the pivot joint 1 from the opposite direction with respect to the Fig. 1A-B shown. On this side of the pivot joint 1, the securing cam 27 is held on the pivoting lever 5 via a securing spring means 28. In principle, the pivot joint could also be constructed such that the securing cam 27 is fixed to the assembly lever 2 via a securing spring means 28. The arrangement of the securing cam 27 on the pivot lever 5 is therefore not mandatory. The securing spring means 28 is further defined on the pivot lever, that the securing cam 27 at least substantially parallel to the articulation pivot axis 6 of the pivot joint 1 between a securing position and a release position can be adjusted back and forth, wherein the adjustment of the safety cam 27 by an interaction of the safety cam 27 with the locking cam 16 on the one hand and the locking spring means 28 on the other hand, which also act in opposite directions on the safety cam 27. The safety cam 27 obstructs or blocks in a safety position accidental adjustment of the locking cam 16 of the detent position in the Release position. In the release position, however, the safety cam 27 releases an adjustment of the locking cam 16 from the detent position to the release position. In this case, the securing cam 27 is adjusted by adjusting the pivot lever 5 against the restoring force of the securing spring means 28 from the securing position to the release position. The adjustment of the securing cam 27 back into the securing position is effected by the restoring force of the securing spring means 28 when the corresponding movement is released by the locking cam 16.

In the Fig. 2A a detail of the pivot joint 1 in the region of the pivot lever 5 with the securing cam 27 and the securing spring means 28 is shown. In the Fig. 2B This detail is cut along the IIB-IIB line Fig. 2A shown in the backup position. Right, the mounting lever 2 is shown, which is placed on the sprocket element 3. The ring gear 12 of the ring gear member 3 is received in the enclosed by the pivot lever 5 and the cover elements 14,15 receptacle 13. In the receptacle 13 of the ring gear 12 is in engagement with the locking cam 16, which has a recess 29 left below, in which engages the free end of the securing cam 27. The safety cam is fixed on the pivot lever 5 via the safety spring means 28. The safety spring means 28 allows adjustment of the safety cam 27 from that in the Fig. 2B shown securing position against the restoring force in the release position according to Fig. 2C , namely parallel to the pivot axis 6, since the safety cam 27 is seated in an opening 32 of the lid member 14. This opening 32 serves as a guide for the safety cam 27 for adjusting the safety cam 27 from the securing position to the release position and back. The locking spring means 28 is also fixed to the pivoting lever 5, via a bolt 33. The triggering sliding surfaces 30, 31 of the locking cam 16 and the securing cam 27 serve to adjust the securing cam 27 from the securing position to the release position. The triggering sliding surfaces 30, 31 slide against one another when the control disk 7 due to a pivoting of the pivot lever 5 in the adjustment direction the locking cam 16 from the detent position in adjusted the release order. The safety cam thereby passes to the left in the Fig. 2C illustrated release position and thus with its free end of the recess 29 out. As a result, the safety cam 27 allows the adjustment of the locking cam 16 in the in the Fig. 2C shown release position.

In the Fig. 3 the pivot joint 1 is shown in the starting position and in a sectional view. The starting position forms an end of the adjustment range for the pivot lever 5. From the initial position of the pivot lever 5 can be pivoted in the adjustment direction E relative to the mounting lever 2, wherein the locking cam 16 in principle remains in engagement with the ring gear 12, during adjustment of the pivot lever 5, however the sprocket 12 slides off. However, the restoring force of the retaining element 20 in the form of a spring element pushes the toothing 17 of the locking cam 16 again into the outer toothing 18 of the ring gear 12. This leads to a form fit, which blocks a pivoting back of the pivot lever 5 in the direction opposite to the adjustment direction E opposite return direction R because the locking cam 16 then wedged between the sprocket 12 and the receptacle 13. If the user has pivoted the pivoting lever 5 in the adjustment direction E so far that he can assume a comfortable sitting position, blocking the pivot joint 1 by the locking mechanism 19 prevents accidental retraction of the pivot joint 1, if this by about the user's head to one of the pivot lever 5 worn head part is loaded in the return direction R. However, a further adjustment of the pivot lever 5 in the direction of adjustment E remains possible, with the free, the locking cam 16 facing the end of the locking cam 27, in the illustrated and so far preferred pivot joint 1 in a recess 29 of the locking cam 16 adjacent to a tripping sliding surface 30 of Locking cam 16 is arranged.

This is true at least until the pivot joint 1 and the pivot lever 5, as in the Fig. 4 shown reached the end of the adjustment range or the setting angle. Not only the ring gear 12, but also the control disk 7 has rotated in the adjustment direction E. While the control disk 7 in the starting position has been with the locking stop 22 in contact with the locking cam 16, now is the control disk 7 with the release stop 21 in abutment on another side of the locking cam 16. If the pivot lever 5 further pivoted in the adjustment direction E, there is no adjustment of the pivot joint 1 more. Rather, the control disk 7 presses the locking cam 16 from the locking position in the direction of a release position in which the locking cam 16 is disengaged from the ring gear 12. First, however, the locking cam 16 is driven by the control disk 7 with a tripping sliding surface 30 against the free end of the safety cam 27, in particular against a tripping sliding surface 31 of the free end of the securing cam 27. The tripping sliding surfaces 30,31 are compared to the adjustment of the safety cam 27 of the Inclined securing position in the release position, so that the locking cam 16 the locking cam 27 on the system and the sliding of the tripping sliding surfaces 30,31 of the securing position against the restoring force of the Sicherungsfedermittels 28 and at least substantially parallel to the pivot axis 6 away from the mounting lever 2 in the Trigger position adjusted.

As for the adjustment of the safety cam 27 from the securing position to the release position, a higher force is required for adjusting the pivot lever 5 in the adjustment in the adjustment, a clear pressure point can be determined for the user when the locking cam 16 in contact with the safety cam 27th is and this adjusted in the direction of the trigger position. Before this is achieved, the user who has detected the pressure point and thus received the feedback that he has arrived at the end of the adjustment range of the pivot joint 1, the pivot lever 5 release. In this case, as a result of the alignment of the tripping sliding surface 30, the swivel lever 5 is adjusted back so that the last setting position is taken along the setting range of the swivel joint 1. Thus, it can ultimately be avoided that the user accidentally adjusts the locking cam 16 from the locking position to the release position. If the pivot lever 5 is still pivoted further in the adjustment direction E, the pivot lever 5 comes to the end position in the adjustment direction E, as shown in the Fig. 5 is shown. In this case, the release stop 21 of the control disk 7 bears against the locking cam 16 and presses the locking cam 16 with its Einstellendanschlag 23 against the receptacle 13 of the pivot lever 5. A further adjustment of the pivot lever 5 in the adjustment direction E is thus blocked. The adjustment of the locking cam 16 from the detent position in which the locking cam 16 is held by the retaining element 20 in contact with the ring gear 12, in the release position in which the locking cam 16 is spaced from the ring gear 12, takes place against the restoring force of the retaining element 20, which presses the locking cam 16 with a retaining stop 24 against a holding means 25 which is formed finger-shaped in the present case. This results in a frictional engagement between the locking cam 16 and the pivot lever 5, which holds the locking cam 16 securely but still allows adjustment of the locking cam 16 back into the detent position without further notice. The pivot lever 5 can now be moved back in the return direction R in the direction of the starting position and beyond, without this movement would be blocked by the locking mechanism 19. The adjustment of the locking cam 16 of the locking position in which the locking cam 16 is held by the holding member 20 in contact with the ring gear 12, in the release position in which the locking cam 16 is spaced from the ring gear 12, also takes place against the restoring force of the Sicherungsfedermittels 28th , which presses the safety cam 27 in the release position against the locking cam 16. The free end of the securing cam 27 is thus no longer arranged in the recess 29 of the locking cam 16.

The pivot lever 5 can now, as the locking cam 16 and the ring gear 12 are held out of engagement with each other, are adjusted in the return direction and in the in the Fig. 6 shown position, in which the control disk 7 with the locking stop 22 in abutment against the locking cam 16. If the pivot lever 5 is then further pivoted in the return direction R, the locking cam 16 is pushed out of the release position and moved into the locking position, in which the locking cam 16 is no longer spaced from the sprocket 12 is held, but comes into engagement with the ring gear 12. In this case, the locking cam 16 comes with a Rückstellendanschlag 26 in abutment with the receptacle 13 of the pivot lever 5. The pivot lever 5 is then reached in a corresponding end position, in which it is in accordance with the starting position Fig. 3 is. The control disk 7 presses with the locking stop 22, the locking cam 16 with the Rückstellendanschlag 26 against the receptacle 13. Another adjustment of the pivot lever 5 in the return direction R is blocked so reliable. Furthermore, the safety cam 27 has been reset as a result of the restoring force of the Sicherungsfedermittels 28 of the release position in the securing position in which the free end of the locking cam 27 is disposed in the recess 29 of the locking cam and the movement of the locking cam 16 when re-adjusting the pivot joint 1 is not hindered by pivoting the pivot lever 5. Now, the pivot lever 5 can thus be pivoted again under meshing engagement of the locking cam 16 in the ring gear 12 in the adjustment direction E, to set the functional part in a comfortable position.

In the Fig. 7 the control disk 7 is shown separately. The release stop 21 and the locking stop 22 are offset from each other in a certain angular range WB. However, the actual setting angle EW or the actual adjustment range is less than the angular range WB between the release stop 21 and the locking stop 22, since the control disk 7 still has to accomplish the adjustment of the locking cam 16 from the locking position to the release position and back.

For this end of the range WB trigger angle ranges are provided which describe the trigger angle AW and the trip path of the pivot lever 5 relative to the mounting lever 2, which is required to move the locking cam 16 from the detent position to the release position and back. What remains of the actual angle range WB corresponds to the setting angle EW or the setting range that can be used for setting the functional part.

The triggering angle AW or triggering path which adjoins the adjustment angle EW on the right can also be referred to as a disengagement angle or disengagement travel. The corresponding angle or path is used when adjusting the pivot lever 5 for disengaging the locking cam 16 from the sprocket 12, so that the locking cam 16 and the ring gear 12 are disengaged. Correspondingly, the triggering angle AW or triggering path which follows the adjustment angle EW on the left can also be referred to as a latching angle or latching path. The corresponding angle or path is used when adjusting the pivot lever 5 for re-engagement of the locking cam 16 in the ring gear 12, so that the locking cam 16 and the ring gear 12 again engage with each other.

It can be defined by the angular range WB of the control disk 7 defined between the release stop 21 and the locking stop 22 of the setting EW. In addition, the starting position of the pivoting lever 5 can be predetermined by the position of the locking stop 22 and / or by the angular position in which the control disk 7 is connected to the sprocket element 3. If the starting position is to be changed, only the angular position of the control disk 7 has to be changed to the sprocket element 3 or another control disk 7 is used. If the setting angle EW is to be changed, only the control disk 7 must be replaced by a control disk 7 with a different setting angle EW. However, the pivot joint 1 may otherwise remain unchanged.

In principle, it is pointed out that the present and in this respect preferred pivot joint 1 rotatably connected to the mounting lever 2 components as well as rotation with the pivot lever 5 could be connected. Then preferably the present rotationally fixed to the pivot lever 5 components connected as a balance rotatably connected to the mounting lever 2. Furthermore, components which can be connected to the assembly lever 2 or the pivoting lever 5 in a rotationally fixed manner can optionally be provided for those skilled in the art. Alternatively or additionally, components can not be rotatably connected neither with the mounting lever 2 nor the pivot lever 5. For example, the last two components may include the mounting axis 4.

LIST OF REFERENCE NUMBERS

1

pivot

2

mounting lever

3

Sprocket element

4

mounting axis

5

pivoting lever

6

Joint pivot axis

7

control disc

8.9

groove

10.11

feather

12

sprocket

13

admission

14.15

cover element

16

locking cam

17

gearing

18

external teeth

19

ratchet

20

retaining element

21

solvent stop

22

lock Catch

23

Einstellendanschlag

24

retaining stop

25

holding means

26

Resettable stop

27

securing cam

28

Backup spring means

29

recess

30

Auslösegleitfläche

31

Auslösegleitfläche

32

opening

33

bolt

e

Setting direction

R

Return direction

AW

release angle

EW

Setting angle

WB

angle range

Claims (15)

Swivel joint (1) for adjusting a functional part, in particular a head part, a foot part or an armrest, a piece of furniture, in particular seating furniture and / or upholstered furniture, with a mounting lever (2) for mounting the swivel joint (1) on the furniture and a swivel lever (5) for carrying and adjusting the functional part, wherein the mounting lever (2) and the pivot lever (5) are pivotally connected to each other from a starting position to an end position about a hinge pivot axis (6) in a setting direction (E), wherein the pivot lever (5) in a Variety of provided between the initial position and the end position locking positions by a blocking positive engagement of a locking mechanism (19) against pivoting in the direction of adjustment (E) opposite return direction (R) is locked, wherein the locking mechanism (19) a locking cam (16) and a sprocket (12) rotatable in one direction relative to the locking cam (16) and where in the locking cam (16) by a pivoting of the pivot lever (5) of a in engagement with the ring gear (12) located detent position in a disengaged from the ring gear (12) located release position and is provided back adjustable,
characterized in that
a against the restoring force of a Sicherungsfedermittels (28) from a securing position into a release position and in the direction of the restoring force of the release position in the securing position adjustable back cam (27) is provided and that the safety cam (27) in the securing position accidental adjustment of the locking cam ( 16) obstructed by the detent position in the release position and releases in the release position, an adjustment of the locking cam (16) from the detent position to the release position and that the safety cam (27) by adjusting the Swivel lever (5) from the securing position in the release position is adjustable. Swivel joint according to claim 1,
characterized in that
the locking cam (16) has a tripping sliding surface (30) which can be brought into contact with the safety cam (27) and that the tripping sliding surface (30) is inclined from the securing position into the tripping position with respect to the adjustment direction of the safety cam (27), so that the locking cam (16 ) the safety cam (27) by conditioning the tripping sliding surface (30) from the securing position in the direction of the release position, in particular in the release position, is adjustable. Swivel joint according to claim 1 or 2,
characterized in that
the safety cam (27) has a tripping sliding surface (31) which can be brought into abutment against the locking cam (16) and that the tripping sliding surface (31) is inclined from the securing position into the tripping position with respect to the adjustment direction of the safety cam (27), so that the locking cam (16 ), the safety cam (27) by conditioning the tripping sliding surface (31) from the securing position in the direction of the release position, in particular in the release position, adjustable, and that, preferably the tripping sliding surfaces (30,31) of the safety cam (27) and the locking cam ( 16) for adjusting the safety cam (27) from the securing position to the release position by adjusting the pivot lever (5) in abutment against each other for sliding against each other are formed. Swivel joint according to one of claims 1 to 3,
characterized in that
the safety cam (27) between the securing position and the Release position and back in a direction parallel to the joint pivot axis (6) is adjustable. Swivel joint according to one of claims 1 to 4,
characterized in that
the ring gear (12) has an outer toothing (18) pointing away from the joint pivot axis (6) and / or that the ring gear (12), in particular endless, is provided circumferentially around the joint axis (6) and / or that the locking cam (16) has a having toothed ring (12) corresponding toothing (17). Swivel joint according to one of claims 1 to 5,
characterized in that
at least one at least partially together with the ring gear (12) relative to the locking cam (16) rotatable and releasably provided control disc (7) is provided that a release stop (21) of the control disc (7) during pivoting of the pivot lever (5) in the adjustment ( E) with the locking cam (16) is engageable to adjust the locking cam (16) in a disengaged from the ring gear (12) release position that the pivot lever (5) with the locking cam (16) in the release position in the return direction (R) is pivotable back into the starting position and that a locking stop (22) of the control disk (7) when pivoting the pivot lever (5) in the return direction (R) with the locking cam (16) is engageable to the locking cam (16) in the initial position in a mesh with the ring gear (12) located detent position. Swivel joint according to claim 6,
characterized in that
the release stop (21) and the locking stop (22) of the control disk are provided abutting on the side opposite the sprocket protruding portions of the locking cam (16) and / or that the control disk (7) at least partially positively rotationally fixed relative to the sprocket (12) held, in particular is fixed. Swivel joint according to claim 6 or 7,
characterized in that
a sprocket element (3) carrying the sprocket (12) and the control disk (7) are placed on one another and / or one another and that, preferably, the sprocket element (3) and the control disk (7) comprise a plurality of corresponding groove / spring connections, to connect the control disc (7) in different rotational positions with the sprocket element (3). Swivel joint according to one of claims 1 to 8,
characterized in that
the mounting lever (2) and the pivoting lever (5) via an assembly axis (4) are interconnected and that, preferably, the control disc (7) and the ring gear (12) mounted on the mounting axis (4) and rotatable about the mounting axis (4 ) are held. Swivel joint according to one of claims 6 to 9,
characterized in that
the mounting lever (2) or the pivot lever (5) forms a receptacle (13) for receiving the sprocket (12), control disk (7) and locking cam (16) and that, preferably, the receptacle (13) for positioning the control disk (7 ) are locked to the locking cam (16) and / or the ring gear (12) on both sides by cover elements (14,15). Swivel joint according to one of claims 1 to 10,
characterized in that
the locking cam (16) in the release position of a, preferably designed as a spring element, retaining element (20), in particular clamped, held and that, preferably, the locking cam (16) has a retaining stop (24) and that the spring element is provided so that the restoring force of the spring element, the retaining stop (24) of the locking cam (16) in the release position in abutment with a holding means (25) of the mounting lever (2) and / or pivot lever (5) brings. Swivel joint according to one of claims 1 to 11,
characterized in that
the locking cam (16) has a Einstellendanschlag (23) for abutment with the mounting lever (2) and / or the pivot lever (5) when adjusting the pivot lever (5) in an end position in the adjustment direction (E) and that, preferably, the locking cam (16) in the end position of the pivot lever (5) in the adjustment direction (E) in contact with the release stop (21) of the control disc (7). Swivel joint according to one of claims 1 to 12,
characterized in that
the locking cam (16) has a Rückstellendanschlag (26) for abutment with the mounting lever (2) and / or the pivot lever (5) when adjusting the pivot lever (5) in an end position in the return direction (R) and that, preferably, the locking cam (16) in the end position of the pivot lever (5) in the return direction (R) in contact with the locking stop (22) of the control disc (7). Swivel joint according to claim 12 or 13,
characterized in that
the locking cam (16) in the end position of the pivot lever (5) in the adjustment direction (E) between the control disk (7) on the one hand and the mounting lever (2) and / or pivot lever (5) on the other hand is clamped and / or that the locking cam (16 ) in the end position of the pivot lever (5) in the return direction (R) between the control disk (7) on the one hand and the mounting lever (2) and / or pivot lever (5) on the other hand is clamped. Swivel joint according to one of claims 6 to 15,
characterized in that
the control disk (7) between the release stop (21) and the locking stop (22) defines an angular range (WB) and that, preferably, the angular range (WB), the triggering angle (AW) and / or triggering travel for adjusting the locking cam (16) from the detent position to the release position and the release angle (AW) and / or release travel for adjusting the locking cam (16) from the release position to the detent position define the setting angle (EW) for adjusting the pivot joint (1).

Images