EP1625810A1 - Movement damping device - Google Patents

Abstract

The linear movement damper (100) has first (102) and second (104) guide rails. The first guide rail may be part of a piece of furniture and the second rail forms part of a drawer. The first rail has a profiled member forming a socket (110) and holds a stop member (118) using several screws. The cylinder (142) for the damper is held in a rectangular framework (138) with a locking device (136).

Description

The present invention relates to a movement damping device comprising a damper housing, a piston displaceable relative to the damper housing with a piston rod and a retaining device, which prevents the piston rod to follow the movement of the damper housing when the damper housing moves away from the retaining device along its extension direction until the piston rod has been pulled out of the damper housing by a predetermined pull-out distance and then releases the piston rod.

Such movement damping devices are known from the prior art and, in particular in pull-out guides which comprise at least one first guide rail and a second guide rail which can be displaced relative to the first guide rail, can be used to control the speed of the second guide rail relative to the first guide rail in the first guide rail End phase of the movement of the second guide rail in the insertion position to reduce or at least limit, so that a held on the pullout guide extract moves as gently as possible in the insertion position.

The effect of the movement damping device is based on the piston having to overcome a resistance force, for example a flow resistance or a frictional resistance, in order to move relative to the damper housing, so that the kinetic energy of the guide rail to be braked is dissipated.

During movement of the piston relative to the damper housing during the motion damping process, the piston rod is pushed further and further into the damper housing until the damper housing has reached its end position.

If now the damper housing is moved back from this end position to its initial position, then the piston with the piston rod must be moved back to its initial position relative to the damper housing, so that the movement damping device can work properly again during the next insertion process. The piston rod must therefore be moved out of the damper housing when the damper housing moves along its extension direction.

For this purpose, various solutions are already known from the prior art, which, however, all have disadvantages.

Thus, it is known, for example, to push the piston rod out of the damper housing by means of a spring (mechanical or pneumatic) integrated in the damper housing during the extension movement of the damper housing. This has the disadvantage that when inserting the damper housing, the restoring force of this spring must be overcome and for this purpose a higher insertion force is needed. If the furniture on which the movement damping device is used is additionally provided with a self-closing device, as is known, for example, from EP 0 386 731 B1, then this self-closing device must apply a correspondingly higher pull-in force. Now, if a certain furniture is delivered both with and without Bewegungsdämpfungsvorrichtung, the Selbsteinzugsvorrichtung of the furniture must always on the higher pull-in force in the case the use of a motion damping device is required. This has a particularly disadvantageous effect if the restoring force of the spring is particularly great. In addition, the use of a spring to return the piston to its initial position has the adverse effect of causing a spring buffer effect and of alleviating the effect of the spring by increasing the damping performance of the motion damping device.

Furthermore, it is known in motion damping devices to retain the piston rod by means of a retaining device in its end position as long as the damper housing along its extension direction of the retainer moves away until the piston rod has been pulled out by the desired Auszugweg from the damper housing.

Such a retaining means may for example comprise a piston rod end mounted on the magnet, which is retained on a likewise magnetic or magnetizable stop of the piston rod until the piston rod has been completely pulled out of the damper housing, whereupon the magnet at the piston rod end of the stop of the piston rod dissolves and with the damper housing is moved. This solution has the disadvantage that additional components are required and the permanent magnet used is relatively expensive. In addition, both at the beginning of the extension movement of the damper housing and then also when the detachment of the magnet from the stop of the piston rod an unpleasant jerk occurs because the magnetic attraction must be overcome in a very small displacement. When the magnet strikes the stopper of the piston rod, it must also be ensured that the magnet does not impinges directly on an opposite metal surface, otherwise an unpleasant clicking sound is generated. To prevent this, a mechanical damping element between the magnet and the stop of the piston rod must be provided, which further increases the number of required components.

It is also known to use a latching element located at the piston rod end and a stationary latching element cooperating therewith, the two latching elements being coupled together when the damper housing is pushed in and then decoupling from one another when the damper housing is withdrawn when the piston rod has been completely pulled out of the damper housing is. In this solution is a disadvantage that when inserting the damper housing a high latching force must be applied for locking the two locking elements. This has a disturbing effect, in particular, when the furniture in question is provided with a self-closing device and the pulling-in force therefore has to be applied by this self-closing device. Furthermore, in the case of such a locking mechanism, a high force for detaching the piston rod from the stationary locking element when removing the damper housing is required, since the latching force must be designed for the highest occurring when pulling out of the damper housing damper extraction force. Furthermore, the use of such a detent mechanism is often associated with clicking noises.

From DE 102 56 133 A1 a Ausziehführungsgarnitur with a rail system is known which includes a fixed carcass rail and a directly or indirectly on a center rail thereon longitudinally displaceably mounted drawer rail, wherein both a damping device as a coupling device between the fixed rail and the linearly movable drawer slide are provided, wherein the damping device includes a cylinder and a linearly movable piston rod damped therein, wherein the cylinder is connected to the movable drawer rail and the piston rod with a first part of the coupling device, which with a second part of the coupling device on the carcass rail temporarily positively and repeatedly releasably cooperates, wherein the first part of the coupling device includes a hook body which is arranged on the free end of the piston rod to a mounting portion, and at least one return hook is arranged at the free end of the hook body , which can be moved elastically resiliently by the action of force of a fixedly connected to the drawer rail control wedge, and wherein the second part of the coupling device includes at least one lobe, the de m at least one return hook can be temporarily engaged. In this known from DE 102 56 133 A1 device is a disadvantage that the piston rod carries at its free end the hook body with the at least one elastically resiliently movable return hook and thus constructed complicated and expensive to manufacture.

The present invention has for its object to provide a movement damping device of the type mentioned above, which allows in a simple and reliable manner a return movement of the piston rod into its initial position relative to the damper housing when pulling the damper housing along the extension direction.

This object is achieved in a motion damping device having the features of the preamble of claim 1 according to the invention that the retaining device comprises at least one retaining element which engages in a retaining position an end portion of the piston rod so that the piston rod is prevented from following the movement of the damper housing , and in a release position allows the end portion of the piston rod passes, and that the motion damping device comprises a locking device with at least one blocking element, which prevents the retaining element from the retaining position moves to the release position until the piston rod pulled out of the damper housing by the predetermined Auszugweg has been, and then releases the movement of the retaining element in the release position.

The solution according to the invention is thus based on the concept of retaining the piston rod in a stop position by means of positive locking with at least one retaining element of the retaining device until the damper housing has been moved by the predetermined extension travel in the extension direction and thus the piston rod has been pulled out of the damper housing by this withdrawal path. wherein the retaining element is prevented by a locking element associated with the blocking element, that is not or at least not exclusively by latching with the piston rod, from it, to release the movement of the piston rod in the extension direction.

The solution according to the invention has the advantage that the piston rod does not have to carry a movable section at its end region and thus, in particular when using a damper with a cylindrical piston rod, preferably made of metal, by simple, in particular machining, machining can be shaped so that it cooperates with the at least one retaining element, without the attachment of additional parts is required.

In particular, the piston rod may be integrally formed.

The interaction of the blocking element with the retaining element can basically be of any nature.

Preferably, however, it is provided that the blocking element prevents by positive engagement with the retaining element, the retaining element on the movement of the retaining position in the release position.

The movement damping device according to the invention can be used both in pull-outs with self-closing device and in pull-outs without self-closing device.

Such a self-retracting device engages when the extract has reached a Selbsteinzugsstartstellung on the extract or on a guide rail of an extension guide and moves the extract or the guide rail of the drawer guide automatically in the insertion position.

The basic structure and the basic mode of operation of such a self-retracting device are known, for example, from EP 0 386 731 B1.

When using the movement damping device according to the invention together with a self-retraction device is preferably to ensure that the damping path of the motion damping device is tuned to the Selbsteinzugsweg.

The motion damping device according to the invention preferably comprises at least two retaining elements, wherein in a preferred embodiment of the invention, at least two retaining elements of the retaining means are arranged on opposite sides of the piston rod.

In particular, it can be provided that the retaining device has a tubular construction and comprises a plurality of retaining elements, which are arranged in the retaining position along the circumference of the piston rod.

In order to achieve that the retaining element can be moved in a simple and reliable manner by the piston rod from the retaining position to the free-hold position to allow the piston rod to pass in the direction of insertion, it is provided in a preferred embodiment of the invention that the retaining element a the damper housing facing run-on slope, against which the piston rod starts when it moves in the direction of extension opposite direction of insertion.

In a particular embodiment of the invention it is provided that the retaining element has a formula elasticity, by which the retaining element in its rest position, ie occupies the retaining position without the action of an external force.

Alternatively, it can also be provided that the retaining element has a formula elasticity, by which the retaining element in its rest position, i. without the action of an external force occupying the release position.

In particular, when the retaining element assumes the retaining position in its rest position, it is advantageously provided that the piston rod moves the retaining element from the retaining position into the release position when it passes the retaining element.

In particular, when the retaining element assumes the release position in its rest position, it is advantageously provided that the blocking element moves the retaining element from the release position into the retaining position when the blocking element moves in the direction of pull opposite to the direction of insertion.

During operation of the movement damping device, it may also be the case that the piston rod is in its maximum position pushed into the damper housing, without the end region of the piston rod having already reached the stop position behind the retaining elements. In order to be able to move the end portion of the piston rod into the stop position even in such an exceptional situation, so that the piston rod can be properly withdrawn from the damper housing during the next extraction process, it is provided in a preferred embodiment of the invention that the end region of the piston rod in the extension direction opposite insertion direction is movable past the retaining element when the retaining element is in the retaining position.

This "emergency function" of the movement damping device can be ensured, for example, in that an end region of the retaining element coming into contact with the piston rod is elastically deformable such that the end region of the piston rod can be moved past the retaining element in the insertion direction opposite the extension direction, when the retaining element is in the retention position.

Alternatively or additionally, it may also be provided that the blocking element has a recess into which the retaining element can escape when the end region of the piston rod moves past the retaining element in the insertion direction opposite to the extension direction.

In a preferred embodiment of the invention, the retaining device further comprises a stop for the piston rod.

In order to reduce the number of components required for the motion damping device, it can be provided that the at least one retaining element and the stop for the piston rod are formed integrally with each other.

In order to prevent the return of the retaining element from the retaining position to the release position, the blocking element may in particular have a contact surface with which the blocking element can be applied to a contact surface of the retaining element in order to hold the retaining element in the retaining position.

In order to achieve that when inserting the damper housing, the blocking element and the retaining element associated therewith are correctly positioned relative to each other, the blocking element may have a run-on slope, with which the blocking element against the retaining element starts when the blocking element moves in the direction of extension opposite direction of insertion and by which the retaining element is moved from the release position to the retaining position.

The locking device may in particular be rigidly connected to the damper housing, so that the locking device is always moved together with the damper housing in the extension direction or in the insertion direction.

The locking device may in particular comprise a holder for the damper housing.

In order to be able to vary the length of the pull-out path, by which the piston rod is pulled out of the damper housing when the damper housing is pulled out, it can be provided that the position of the lock element is adjustable relative to the damper housing.

In order to be able to arrange the movement damping device according to the invention in a simple manner on an extension guide, it is provided in a preferred embodiment of the invention that the locking device comprises a connecting device for fixing the locking device to a guide rail of an extension guide.

For the same purpose it can be provided that the retaining device comprises a connecting device for fixing the retaining device to a guide rail of an extension guide.

These connecting devices may in particular comprise at least one latching element and / or at least one fastening screw.

So that the retaining element in the retaining position can easily engage behind an end region of the piston rod, it can be provided that the end region of the piston rod has a constriction in which the retaining element engages in the retaining position.

To achieve that the piston rod can displace the retaining element in a simple manner from the retaining position to the release position when the piston rod moves in the direction of insertion, it can be provided that the end region of the piston rod has a run-on slope, with which the piston rod against the retaining element starts when it moves in the pull-out direction opposite to the insertion direction against the retaining element.

In order to hold the end portion of the piston rod when pulling the damper housing securely in the stop position behind the retaining element until the retaining element moves into the release position, it can be provided that the end portion of the piston rod has a blocking surface, with which the piston rod rests against the retaining element, while the piston rod is prevented from following the movement of the damper housing along the extension direction.

In a preferred embodiment of the motion damping device according to the invention it is provided that the retaining element comprises a retaining claw with a longitudinal direction and that the longitudinal direction of the retaining claw with the local surface normal of the locking surface at the point where the locking surface bears against the retaining claw, while the piston rod is prevented to follow the movement of the damper housing along the extension direction, an angle of at most about 45 °, preferably at most about 20 °, in particular of substantially 0 °, includes. This ensures that when the piston rod rests with its locking surface on the retaining claw of the retaining element, only a small force or preferably no force can be transmitted from the piston rod to the retaining claw perpendicular to the longitudinal direction of the retaining claw, so that the retaining claw not deflected perpendicular to its longitudinal direction and in particular not unintentionally from its restraint position in which it prevents the piston rod from following the movement of the damper housing is movable into its release position.

Claim 26 is directed to a pullout guide comprising at least a first guide rail and a second guide rail, which is displaceable along a pull-out direction relative to the first guide rail, and a movement damping device according to the invention, wherein the retaining means on the first guide rail and the damper housing on the second guide rail is arranged.

In this case, the first guide rail may be a body-side guide rail and the second guide rail may be an extraction-side guide rail of the pull-out guide.

Just as well, however, the first guide rail could be arranged on an extension and the second guide rail on a body of a piece of furniture.

Furthermore, the drawer guide could also comprise further guide rails, which are held displaceably on the first guide rail or on the second guide rail or between the first guide rail and the second guide rail.

If the movement damping device according to the invention is to cooperate with a self-closing device, it is preferably provided that such a self-retraction device is arranged on the pullout guide, which, when the second guide rail is moved in its insertion position relative to the first guide rail, on reaching a Selbsteinzugsstartstellung on a guide rail the pull-out guide attacks and moves this guide rail in the insertion position.

Further features and advantages of the invention are the subject of the following description and the drawings of exemplary embodiments.

Fig. 1

eine schematische perspektivische Darstellung einer Auszugführung, die eine erste Führungsschiene mit einer daran angeordneten Rückhalteeinrichtung und eine zweite Führungsschiene mit einer daran angeordneten Sperreinrichtung und einem an der Sperreinrichtung gehaltenen Dämpfergehäuse umfasst;

Fig. 2

einen schematischen Längsschnitt durch die Auszugführung aus Fig. 1;

Fig. 3

eine schematische Seitenansicht der Auszugführung in einem Zustand, in dem das Dämpfergehäuse in einer Einschubrichtung relativ zu der Rückhalteeinrichtung bewegt wird und ein Kolbenstangenkopf einer Kolbenstange eines in dem Dämpfergehäuse verschiebbar geführten Kolbens gerade die Rückhalteelemente der Rückhalteeinrichtung erreicht hat;

Fig. 4

eine der Fig. 3 entsprechende Darstellung der Auszugführung in einem Zustand, in dem der Kolbenstangenkopf die Rückhalteelemente von der Rückhaltestellung in die Freigabestellung bewegt, um die Rückhalteelemente passieren zu können;

Fig. 5

eine der Fig. 4 entsprechende Darstellung der Auszugführung in einem Zustand, in welchem der Kolbenstangenkopf die Rückhalteelemente passiert hat und sich in einer Stoppstellung zwischen dem Anschlag und den Rückhaltelementen befindet, welche sich in die Rückhaltestellung zurückbewegt haben;

Fig. 6

eine der Fig. 5 entsprechende Darstellung der Auszugführung in einem Zustand , in welchem sich der Kolbenstangenkopf in der Stoppstellung befindet, während sich das Dämpfergehäuse weiter in der Einschubrichtung bewegt und Sperrelemente der Sperreinrichtung die Rückhalteelemente erreicht haben;

Fig. 7

eine der Fig. 6 entsprechende Darstellung der Auszugführung in einem Zustand, in welchem sich der Kolbenstangenkopf in der Stoppstellung befindet und das Dämpfergehäuse seine Endlage erreicht hat, in welcher die Kolbenstange maximal in das Dämpfergehäuse eingeschoben ist;

Fig. 8

eine der Fig. 6 entsprechende Darstellung der Auszugführung in einem Zustand, in welchem die Sperrelemente die Rückhalteelemente erreicht haben, ohne dass sich der Kolbenstangenkopf in der Stoppstellung befindet;

Fig. 9

eine der Fig. 8 entsprechende Darstellung der Auszugführung in einem Zustand, in dem der Kolbenstangenkopf sich an den Rückhalteelementen vorbeibewegt, welche in jeweils eine Ausnehmung der Sperreinrichtung ausweichen;

Fig. 10

eine schematische perspektivische Darstellung einer zweiten Ausführungsform der Auszugführung mit Bewegungsdämpfungsvorrichtung, deren Sperreinrichtung keine Ausnehmungen für das seitliche Ausweichen der Rückhalteelemente aufweist;

Fig. 11

einen schematischen Längsschnitt durch die zweite Ausführungsform einer Auszugführung aus Fig. 10;

Fig. 12

eine schematische Seitenansicht der zweiten Ausführungsform einer Auszugführung aus den Fig. 10 und 11 in einem Zustand, in dem der Kolbenstangenkopf die Rückhalteelemente unter elastischer Verformung derselben passiert, nachdem die Sperrelemente die Rückhalteelemente bereits erreicht haben;

Fig. 13

eine schematische perspektivische Darstellung einer dritten Ausführungsform einer Auszugführung mit Bewegungsdämpfungsvorrichtung, bei welcher die Rückhalteelemente in die Freigabestellung vorgespannt sind;

Fig. 14

einen schematischen Längsschnitt durch die dritte Ausführungsform einer Auszugführung aus Fig. 13;

Fig. 15

eine schematische Seitenansicht der dritten Ausführungsform einer Auszugführung in einem Zustand, in dem der Kolbenstangenkopf gerade die in der Freigabestellung befindlichen Rückhalteelemente passiert;

Fig. 16

eine der Fig. 15 entsprechende Darstellung der dritten Ausführungsform einer Auszugführung in einem Zustand, in dem Anlaufschrägen der Sperrelemente die Rückhalteelemente erreicht haben und dieselben von der Freigabestellung in die Rückhaltestellung bewegen;

Fig. 17

eine der Fig. 16 entsprechende Darstellung der dritten Ausführungsform einer Auszugführung in einem Zustand, in welchem die Rückhalteelemente die Rückhaltestellung erreicht haben;

Fig. 18

eine der Fig. 17 entsprechende Darstellung der dritten Ausführungsform einer Auszugführung in einem Zustand, in welchem das Dämpfergehäuse seine Endlage erreicht hat und die Kolbenstange maximal in das Dämpfergehäuse eingeschoben ist;

Fig. 19

eine der Fig. 17 entsprechende Darstellung der dritten Ausführungsform einer Auszugführung in einem Zustand, in welchem die Sperrelemente die Rückhalteelemente bereits in die Rückhaltestellung bewegt haben, ohne dass sich der Kolbenstangenkopf in der Stoppstellung befindet;

Fig. 20

eine der Fig. 19 entsprechende Darstellung der dritten Ausführungsform einer Auszugführung in einem Zustand, in dem sich der Kolbenstangenkopf in der Einschubrichtung an den Rückhalteelementen vorbei bewegt, wobei die Rückhalteelemente in eine Ausnehmung der Sperreinrichtung ausweichen; und

Fig. 21

eine vergrößerte Darstellung des Kolbenstangenkopfes und der Rückhaltekrallen der zweiten Ausführungsform einer Auszugführung in einer Stoppstellung, in welcher eine Sperrfläche des Kolbenstangenkopfes an einem hinteren Ende jeder Rückhaltekralle anliegt.

The drawings show:

Fig. 1

a schematic perspective view of an extension guide comprising a first guide rail with a retaining means disposed thereon and a second guide rail with a locking device arranged thereon and a damper housing held on the locking device;

Fig. 2

a schematic longitudinal section through the pullout guide of FIG. 1;

Fig. 3

a schematic side view of the pullout guide in a state in which the damper housing is moved in a direction of insertion relative to the retainer and a piston rod head of a piston rod of a displaceably guided in the damper housing piston has just reached the retaining elements of the retainer;

Fig. 4

a view corresponding to Figure 3 of the pullout guide in a state in which the piston rod head moves the retaining elements from the retaining position to the release position to pass the retaining elements can;

Fig. 5

a view corresponding to Figure 4 of the pullout guide in a state in which the piston rod head has passed the retaining elements and is in a stop position between the stop and the retaining elements, which have moved back into the retaining position.

Fig. 6

a view corresponding to Figure 5 of the pullout guide in a state in which the piston rod head is in the stop position, while the damper housing moves further in the insertion direction and locking elements of the locking device have reached the retaining elements.

Fig. 7

one of Figure 6 corresponding representation of the pullout guide in a state in which the piston rod head is in the stop position and the damper housing has reached its end position in which the piston rod is pushed into the maximum damper housing.

Fig. 8

a view corresponding to Figure 6 of the pullout guide in a state in which the locking elements have reached the retaining elements, without that the piston rod head is in the stop position.

Fig. 9

a view corresponding to Figure 8 of the pullout guide in a state in which the piston rod head moves past the retaining elements, which yield in each case a recess of the locking device;

Fig. 10

a schematic perspective view of a second embodiment of the pullout guide with motion damping device whose locking device has no recesses for the lateral deflection of the retaining elements;

Fig. 11

a schematic longitudinal section through the second embodiment of an extension guide of FIG. 10;

Fig. 12

a schematic side view of the second embodiment of an extract guide of Figures 10 and 11 in a state in which the piston rod head, the retaining elements under elastic deformation thereof passes after the locking elements have already reached the retaining elements.

Fig. 13

a schematic perspective view of a third embodiment of an extension guide with motion damping device, in which the retaining elements are biased in the release position;

Fig. 14

a schematic longitudinal section through the third embodiment of an extension guide of FIG. 13;

Fig. 15

a schematic side view of the third embodiment of an extension guide in a state in which the piston rod head just passed the located in the release position retaining elements;

Fig. 16

a representation corresponding to FIG. 15 of the third embodiment of an extension guide in a state in which run-on slopes of the locking elements have reached the retaining elements and move them from the release position into the retaining position;

Fig. 17

a representation corresponding to FIG. 16 of the third embodiment of an extension guide in a state in which the retaining elements have reached the retaining position;

Fig. 18

17 shows a representation corresponding to the third embodiment of an extension guide in a state in which the damper housing has reached its end position and the piston rod is inserted maximally into the damper housing;

Fig. 19

17 shows a representation corresponding to FIG. 17 of the third embodiment of an extension guide in a state in which the locking elements have already moved the retaining elements into the retaining position without the piston rod head being in the stop position;

Fig. 20

19 shows a representation corresponding to the third embodiment of an extension guide in a state in which the piston rod head moves in the direction of insertion past the retaining elements, wherein the retaining elements escape into a recess of the locking device; and

Fig. 21

an enlarged view of the piston rod head and the retaining claws of the second embodiment of an extension guide in a stop position in which a locking surface of the piston rod head abuts a rear end of each retaining claw.

Identical or functionally equivalent elements are denoted by the same reference numerals in all figures.

A pullout guide shown in FIGS. 1 to 9 and designated as a whole by 100 comprises a first guide rail 102 and a second guide rail 104 which are relatively movable by means of a rolling element arrangement (not shown) along an extension direction 106 and an insertion direction 108 directed opposite to the extension direction 106 to the first guide rail 102 is slidably held on the first guide rail 102.

The first guide rail 102 can be arranged for example on a body of a piece of furniture and the second guide rail 104, for example on an extract of the furniture.

But just as well, the first guide rail 102 could be arranged on the extract and the second guide rail 104 on the body of the furniture.

Furthermore, the pullout guide 100 could also comprise further guide rails, which are held displaceably on the first guide rail 102 or on the second guide rail 104 or else between the first guide rail 102 and the second guide rail 104.

As can be seen from FIGS. 1 and 2, a base 110 in the form of a profiled strip with a U-shaped cross section is arranged on the first guide rail 102. A first leg 112 of the base 110 bearing against the first guide rail 102 is held on the first guide rail 102 by means of a plurality of fastening screws 114.

One of the first guide rail 102 facing away from second leg 116 carries a designated as a whole with 118 retaining means which is releasably secured by means of a plurality of fastening screws 120 to the base 110.

The retaining device 118 comprises a substantially cuboidal base 122, which is provided with stepped passage openings 124 for the fastening screws 120 and extends along the extension direction 106.

From the front end face of the base 122 are two retaining elements 126 along the extension direction 106 from the front, each comprising a parallel to the extension direction 106 extending claw arm 128 and a retaining claw 130, wherein the retaining claw 130 from the front end of the respective claw arm 128 from inside, d. H. to the longitudinal center plane of the retainer 118, and to the rear, d. H. to the base 122 of the retainer 118. The free ends of the retaining claws 130 are spaced from each other.

Between the claw arms 128, a stop projection 132 is formed on the retaining device 118, which protrudes from the front end side of the base 122 along the extension direction 106 and whose front end face forms a stop surface 134.

The claw arms 128 of the retention members 126 have a formulaic elasticity that allows the leading end portions of the retention members 126 to move apart as the passageway extends between the retention claws 130.

Without the action of an external force, the retaining elements 126 are in the restraint position shown in FIGS. 1 and 3 due to their elasticity.

The retainer 118 comprising the base 122, the stopper projection 132 and the retention members 126 is integrally formed from a suitable resilient plastic material, while the base 110 and the guide rails 102, 104 are preferably formed of a metallic material.

The retaining device 118 may be formed in particular as an injection molded part.

The retaining device 118 cooperates in a manner to be described in more detail later with a blocking device designated as a whole with 136, which comprises a substantially rectangular retaining frame 138 which is latched on its underside by means of snap-in feet 140 with passage openings in the second guide rail 104.

The interior of the holding frame 138 forms a receptacle for a substantially hollow cylindrical damper housing 142.

As can be seen from Fig. 2, the damper housing 142 surrounds an, for example, substantially cylindrical inner space 144, in which a movement damping fluid, such as an oil, is arranged.

Into the inner space 144 of the damper housing 142 filled with the movement damping fluid, a piston 146 is immersed, which comprises a piston head 148 arranged inside the inner space 144 and a piston rod 152 guided fluid-tightly from the inner space 144 through a rear wall 150 of the damper housing 142.

The cross section of the piston head 148 substantially corresponds to the cross section of the interior 144.

The piston head 148 is provided with flow channels 153, through which the movement damping fluid from the area lying before the piston head 148 portion 144 a of the interior 144 in the lying behind the piston head 148 portion 144 b of the interior 144 and in the reverse direction through the piston head 148 can flow through, and while overcoming a considerable flow resistance and overcoming the friction between the piston head jacket and the inner wall of the damper housing 142nd

The piston 146 is slidably guided on the damper housing 142 as a whole in its longitudinal direction 154 relative to the damper housing 142.

The piston rod 152 passes through a locking receptacle 156 in a rear end wall 158 of the holding frame 138, in which the piston rod 152 is received so that it is displaceable in its axial direction relative to the holding frame 138, but secured against moving up out of the locking receptacle 156 out ,

The damper housing 142 is further provided at its front end with a substantially cylindrical projection 160 which is received in a locking receptacle 162 of a front end wall 164 of the support frame 138 that it is secured against moving up out of the locking receptacle 162 out.

The front end face and the rear end face of the damper housing 142 are thus located on the front end wall 164 and on the rear end wall 158, respectively of the support frame 138 that the damper housing 142 is secured against movement in its axial direction relative to the support frame 138 and thus relative to the locking device 136.

At its end facing away from the piston head 148, the piston rod 152 ends at a piston rod head 166, which is separated by a portion 168 of smaller diameter from the piston head side part of the piston rod 152. In the region of the section 168, the piston rod 152 is thus provided with a constriction 170.

The piston rod head 166 comprises a frustoconical front portion 172 adjoining the portion 168 of the piston rod 152, a cylindrical middle portion 174 adjoining the front portion 172 and a frusto-conical rear portion 176 adjoining the middle portion 174, on which the piston rod 152 ends.

The surface of the rear portion 176 forms a truncated cone-shaped starting slope 178, with the piston rod head 166 against the retaining elements 126 of the retainer 118 starts when the piston rod 152 moves in the direction of insertion 108 against the retainer 118.

The truncated cone-shaped surface of the front portion 172 of the piston rod head 166 forms a blocking surface 180, with which the piston rod head 166 rests against the retaining claws 130 of the retaining device 118 in a stop position to be described later.

The blocking surface 180 is inclined more strongly against the longitudinal direction 154 of the piston 146 than the starting slope 178.

On both sides of the piston rod 152 projects from the rear end wall 158 of the holding frame 138 of the locking device 136 each have a locking element 182 in the insertion direction 108 to the rear. Each of the locking elements 182 is provided at its rear end with a run-on slope 184.

To this run-up slope 184 is followed in each case to the front of a contact surface 186, which is aligned substantially parallel to the extension direction 106 and the insertion direction 108.

Between the front end of the abutment surface 186 and the rear end wall 158 of the holding frame 138 is provided at each of the locking elements 182 each have a cross-sectionally substantially rectangular recess 188.

The locking device 136 comprising the holding frame 138 and the blocking elements 182 is preferably produced in one piece from a suitable material, preferably from a plastic material.

The plastic material is chosen so that the locking elements 182 are not or only to a small extent elastically deformable.

The locking device 136 may be made in particular as an injection molded part made of a plastic material.

The locking device 136 with the damper housing 142 and the piston 146 and the retainer 118 together form a movement damping device 190 of the drawer guide 100th

The function of the motion damping device 190 described above will be described below in detail with reference to FIGS. 3 to 9.

When the second guide rail 104 is moved with the damper housing 142 relative to the first guide rail 102 from its extended position along the insertion direction 108 in its retracted position, the piston 146 moves with the piston rod 152 due to a relative movement between the piston 146 and the damper housing 142 to overcome large flow resistance initially together with the damper housing 142 in the insertion direction 108 until the state shown in Fig. 3 is reached, in which the piston rod head 166 against the retaining claws 130 of the retaining elements 126 of the retainer 118 runs, the damper housing 142th facing front sides each form a run-on slope 192 for the piston rod head 166.

Moves now the damper housing 142 with the piston rod 152 further in the direction of insertion 108, the retaining claws 130 migrate along the run-on slope 178 of the piston rod head 166 outwardly, whereby the claw arms 128 are spread apart and the retaining elements 126 are moved to its release position, in which Piston rod head 166 can pass the retention claws 138 (see Fig. 4).

After the piston rod head 166 has passed the retaining claws 130, the retaining claws 130 again move inwardly along the locking surface 180 of the piston rod head 166 along the insertion direction 108 along the insertion direction 108 until the retaining claws 130 engage the constriction 170 of the piston rod 152 and the Retaining elements 126 are again in the retaining position (see Fig. 5). At the same time, the front end face of the piston rod head 166 abuts on the abutment surface 134 of the stopper projection 132, so that the movement of the piston rod 152 is stopped along the insertion direction 108 in a stop position.

If now the damper housing 142 moves further in the insertion direction 108, the piston 146 can no longer follow this movement, with the result that the piston rod 152 is pushed into the damper housing 142 (see FIG. 6).

As a result, the piston head 148 moves in the interior 144 of the damper housing 142 to the front. The volume of the movement damping fluid displaced from the region 144a of the interior during this relative movement between the piston 146 and the damper housing 142 flows through the flow channels 153 in the piston head 148 into the region 144b of the interior. Due to the flow resistance to be overcome in the narrow flow channels 153 and the friction between the piston head 148 and the inner wall of the damper housing 142, a braking force is caused which slows down the movement of the damper housing 142 and thus the movement of the second guide rail 104 along the insertion direction 108.

This braked movement along the direction of insertion 108 continues the damper housing 142 until the second guide rail 104 reaches its end stop (not shown) on the first guide rail 102 and comes to rest together with the damper housing 142 in the end position shown in FIG.

As can be seen from Figs. 6 and 7, reach after the piston rod head 166 arrived in the stop position, the locking elements 182 of the locking device 136, the retaining elements 126 and lay with their contact surfaces 186 flat against the stop projection 132 opposite outer sides 194 of Claw arms 128 on. In this case, it is achieved by the chamfers 184 at the front ends of the locking elements 182 that the retaining elements 126 reach into the area between the locking elements 182, even if they should still be spread apart after passing the piston rod head 166.

As long as the locking elements 182 rest against the retaining elements 126 from the outside, the claw arms 128 can not bend apart, and thus a return of the retaining elements 126 to the release position is prevented by the locking elements 182. As a result, the piston rod head 166 initially can not move between the retaining claws 130 along the extension direction 106 when the second guide rail 104 with the damper housing 142 is pulled out relative to the first guide rail 102 again along the extension direction 106. Rather, the piston rod head 166 bears with its locking surface 180 at the free ends of the retaining claws 130 and is thus by the retaining elements 126 in the stop position retained as the damper housing 142 moves away in the extension direction 106 of the piston rod head 166. As a result, the piston rod 152 is again pulled out of the damper housing 142 until the locking elements 182 moving with the damper housing 142 in the extension direction 106 disengage from the retaining elements 126, so that the retaining elements 126 can move back into the release position by spreading the claw arms 128 apart. Whereupon the piston rod head 166 can pass through the passage between the retaining claws 130 and is moved along with the damper housing 142 on further extension of the second guide rail 104 in the extension direction 106.

The maximum extension travel, by which the piston rod 152 is pulled out of the damper housing 142 when the second guide rail 104 is pulled out, and thus the length of the damping path of the movement damping device 190 is thus determined by the distance s around which the rear edge of the contact surface 186 of the locking elements 182 in the end position shown in Fig. 7 behind the front end of the retaining elements 126 lies.

In a variant of the movement damping device 190, this distance can be varied in that the blocking elements 182 are not integrally formed with the holding frame 138 of the locking device 136, but can be fixed releasably to the holding frame 138 in various positions spaced from each other in the longitudinal direction 154.

In this way it is possible to use one and the same motion damper with different damping paths, depending on different loads to be arranged on the pullout guide 100 or in Depending on different, occurring during insertion of the second guide rail 104 speeds.

During operation of the pull-out guide 100, it may also be the case that the piston rod 152 is in its maximum position pushed into the damper housing 142 without the piston rod head 166 having already reached the stop position behind the retaining claws 130, as shown in FIG is. Even in such an exceptional situation, the piston rod head 166 on further insertion of the second guide rail 104 and the damper housing 142 in the direction of insertion 108 may be moved past the retaining claws 130 in the stop position, so that the piston rod 152 again properly pulled out of the damper housing 142 during the next extraction process can be.

To ensure this emergency function of the movement damping device 190, the recesses 188 are provided on the locking elements 182. Namely, as can be seen from Fig. 9, namely, the retaining elements 126 can escape into these recesses 188, when the piston rod head 166 at maximum pushed into the damper housing 142 piston rod 152 reaches the retention claws 130, so that the piston rod head 166 displacing the retaining claws 130 laterally and between them can reach into the stop position (see Fig. 9).

A second embodiment of the drawer guide 100 shown in FIGS. 10 to 12 and 21 differs from the first embodiment shown in FIGS. 1 to 9 only in that the locking elements 182 of the locking device 136 are not provided with the recesses 188, but themselves in substantially the same width from the rear end wall 158 of the holding frame 138 extend to the rear edge of the abutment surface 186.

As best seen in FIG. 12, the emergency function discussed above with respect to the first embodiment is ensured in this embodiment by elastically deforming the retention claws 130 of the retention members 126 in the retention position retaining members 126 such that the piston rod head 166 can push apart the free ends of the retaining claws 130 and pass through the passage between the retaining claws 130 in the stop position between the retaining claws 130 and the stopper projection 132.

In particular, the connecting portion of the retaining claws 130, with which the retaining claws 130 are connected to the respectively associated claw arm 128, is elastically deformable such that each of the retaining claws 130 is pivotable about the connecting region transversely to its respective longitudinal direction 198 (see FIG to let the piston rod head 166 pass between the free ends of the retaining claws 130.

The mobility of the retaining claws 130 relative to the respective associated claw arm 128 can also be achieved by connecting each retaining claw 130 via a joint to the respective associated claw arm 128.

In order to prevent the piston rod head 166 from inadvertently moving between the retaining claws 130 in the extension direction 106 from the stop position shown in FIG. 21, in which the locking surface 180 of the piston rod head bears against the free ends of the retaining claws 130 In this stop position of the piston rod head 166, the retention elements 126 are preferably configured such that the longitudinal direction 198 of each retention claw 130 is at the local surface normal 200 of the locking surface 180 of the piston rod head 166 at the location where the locking surface 180 at the free end of the retaining claw 130 is present, an acute angle of at most about 45 °, preferably at most about 20 °, in particular of substantially 0 ° (as shown in Fig. 21) includes. This ensures that in this stop position, only a small or preferably no force acting perpendicular to the longitudinal direction 198 of the respective retaining claw 130 is transmitted from the blocking surface 180 to the retaining claw 130, and thus the respective retaining claw 130 is not shown in FIG Retaining position in the release position, in which the piston rod head 166 can be moved between the free ends of the retaining claws 130, moving torque acts on the retaining claw 130.

Incidentally, the second embodiment shown in FIGS. 10 to 12 is identical in structure and function to the first embodiment, to the above description of which reference is made.

A third embodiment shown in FIGS. 13 to 20 of an extension guide 100 with a movement damping device 190 differs from the first embodiment shown in FIGS. 1 to 9 in that the retaining elements 126 of the retaining device 118 are in their rest position, in which there is no external force acting on the retaining elements 126, not, as in the first embodiment, in the retaining position, but rather in the release position. Thus, the piston rod head 166 when passing the retaining claws 130 do not have the same first push back the Rückhatteemente 126 in the retaining position in which the retaining claws 130 engage the constriction 170 in front of the piston rod head 166 when the front ends of the retaining elements 126 are reached by the locking elements 182.

Further, the recesses 188 on the locking elements 182, in which the retaining elements 126 can escape, in this embodiment, not as in the first embodiment with a along the extension direction 106 constant cross-section provided, but rather widen these recesses 188 from its rear end to to the rear end wall 158 of the holding frame 138, so that these recesses 188 have a substantially triangular cross-section in the side view of the locking device 136 shown in FIG.

Further, the locking elements 182 are provided on their sides facing away from the piston rod 152 outer sides, each with a recess 196 which extends from the rear end of the respective locking element 182 almost to the rear end wall 158 of the support frame 138.

Incidentally, this third embodiment is consistent in construction with the first embodiment described above.

The operation of this third embodiment will be described in detail below with reference to Figs. 15 to 20.

When the second guide rail 104 with the damper housing 142 relative to the first guide rail 102 from its extended position along the Insertion direction 108 is moved to its retracted position, then moves the piston rod head 166 of the moving with the damper housing 142 piston rod 152 also along the insertion direction 108 between the retaining claws 130 therethrough until the piston rod head 166 abuts with its rear end face against the stop surface 134 of the stop projection 132 (see Figs. 15 and 16).

Since the claw arms 128 of the retaining elements 126 are not aligned parallel to each other in the rest position but enclose a small acute angle and are thus slightly spread apart, the mutually facing ends of the retaining claws 130 at a distance from each other, which at least the diameter of the central portion 174 of the piston rod head 166, so that the piston rod head 166 does not have to move the retaining claws 130 apart to reach the stop position behind the retaining claws 130.

Only when the rear ends of the locking elements 182 reach the front ends of the retaining elements 126, the retaining elements 126 are moved by the locking elements 182 in the retaining division, wherein the front ends of the retaining elements 126 first slide inwardly on the run-on slopes 184 of the locking elements 182 to the Locking elements 182 on the outside of the retaining elements 126 to pass.

Once the abutment surfaces 186 of the locking elements 182 abut from the outside to the outer sides 194 of the retaining elements 126, the retaining elements 126 are prevented from returning to the release position. In this retention position, the retention claws 130 engage the neck 170 in front of the piston rod head 166 (see FIG. 17).

As the damper housing 142 advances in the insertion direction 108, the piston rod 152 is pushed further into the damper housing 142 until the end position shown in FIG. 18 is reached, in which the piston rod 152 is pushed into the damper housing 142 to the maximum extent.

As long as the locking elements 182 rest against the retaining elements 126 from the outside, the claw arms 128 can not bend apart, and thus a return of the retaining elements 126 to the release position by the blocking elements 182 is prevented. As a result, the piston rod head 166 is initially retained in the stop position behind the retaining claws 130, when the second guide rail 104 with the damper housing 142 relative to the first guide rail 102 is pulled out again along the extension direction 106.

As soon as the locking elements 182 moving with the damper housing 142 in the extension direction 106 disengage from the retaining elements 126, the retaining elements 126 return to the release position due to their elasticity, whereupon the piston rod head 166 can pass the passage between the retaining claws 130 and upon further extension of the second guide rail 104 is moved in the extension direction 106 again with the damper housing 142.

The damping travel of the movement damping device 190, ie the maximum extension travel, by which the piston rod 152 is pulled out of the damper housing 142 when the second guide rail 104 is pulled out, is thus also determined in this embodiment by the distance s around which the rear edge of the contact surface 186 of FIG locking elements 182 in the end position shown in Fig. 18 behind the front end of the retaining elements 126 is located.

During operation of the pull-out guide 100, it may also be the case that the piston rod 152 is in its maximum position pushed into the damper housing 142 without the piston rod head 166 having already reached the stop position behind the retaining claws 130, as shown in FIG. 19 is. In order to ensure even in such an exceptional situation that the piston rod head 166 on further insertion of the second guide rail 104 and the damper housing 142 in the insertion direction 108 can be moved past the retaining claws 130 in the stop position, so that the piston rod 152 at the next extraction again properly the damper housing 142 can be pulled out, the recesses 188 are provided on the locking elements 182, in which the retaining elements 126 can escape into it, when the piston rod head 166 reached at maximum in the damper housing 142 inserted piston rod 152, the retaining claws 130, so that the piston rod head 166 the Retaining claws 130 displace laterally under elastic deformation of the claw arms 128 and can pass between the retaining ridges 130 in the stop position (see Fig. 20).

For the rest, the third embodiment shown in FIGS. 13 to 20 is identical to the embodiment shown in FIGS. 1 to 9, to the extent of which the above description is made.

Claims (26)

A motion dampening apparatus comprising a damper housing (142), a piston (146) slidable relative to the damper housing (142), a piston rod (152) and retainer (118) preventing the piston rod (152) from moving the damper housing (142) ) when the damper housing (142) moves away from the retainer (118) along its extension direction (106) until the piston rod (152) has been pulled out of the damper housing (142) by a predetermined withdrawal travel (s), and then releasing the piston rod (152),
characterized,
in that the retaining device (118) comprises at least one retaining element (126) which, in a retaining position, engages behind an end region of the piston rod (152) in such a way that the piston rod (152) is prevented from following the movement of the damper housing (142) a release position lets pass the end portion of the piston rod (152),
and in that the movement damping device (190) comprises a locking device (136) with at least one blocking element (182) which prevents the retaining element (126) from moving from the retaining position into the release position until the piston rod (152) moves by the predetermined extension path (FIG. s) has been pulled out of the damper housing (142), and then releases the movement of the retaining element (126) in the release position. Motion damping device according to claim 1, characterized in that the retaining device (118) comprises at least two retaining elements (126). Motion damping device according to claim 2, characterized in that at least two retaining elements (126) of the retaining means (118) on opposite sides of the piston rod (152) are arranged. Motion damping device according to one of claims 2 or 3, characterized in that the retaining means (118) comprises a plurality of retaining elements (126), which are arranged in the retaining position along the circumference of the piston rod (152). Motion damping device according to one of claims 1 to 4, characterized in that the retaining element (126) has a damper housing (142) facing run-on slope (192) against which the piston rod (152) starts when in the extension direction (106) opposite insertion direction (108) moves. Motion damping device according to one of claims 1 to 5, characterized in that the retaining element (126) has a formula elasticity, by which the retaining element (126) assumes the retaining position without the action of an external force. Motion damping device according to one of claims 1 to 5, characterized in that the retaining element (126) has a formula elasticity, by which the retaining element (126) assumes the release position without the action of an external force. Motion dampening device according to one of claims 1 to 7, characterized in that the piston rod (152) moves the retaining element (126) from the retaining position to the release position when it passes the retaining element (126). Motion damping device according to one of claims 1 to 8, characterized in that the blocking element (182) moves the retaining element (126) from the release position into the retaining position when the blocking element (182) moves in the direction of pull (106) opposite to the insertion direction (108). emotional. Motion damping device according to one of claims 1 to 9, characterized in that the end region of the piston rod (152) in the pull-out direction (106) opposite insertion direction (108) on the retaining element (126) is movable past, when the retaining element (126) in the retention position is located. Movement damping device according to claim 10, characterized in that an end region (130) of the retaining element (126) coming into contact with the piston rod (152) is elastically deformable such that the end region of the piston rod (152) is in the insertion direction opposite to the extension direction (106) (108) is movable past the retaining element (126) when the retaining element (126) is in the retaining position. Motion damping device according to one of claims 1 to 11, characterized in that the blocking element (182) has a recess (188), in which the retaining element (126) can escape when the end portion of the piston rod (152) in the extension direction (106 ) opposite to the insertion direction (108) on the retaining element (126) over. Motion damping device according to one of claims 1 to 12, characterized in that the retaining device (118) comprises a stop (132) for the piston rod (152). Motion damping device according to claim 13, characterized in that the at least one retaining element (126) and the stop (132) for the piston rod (152) are integrally formed with each other. Motion damping device according to one of claims 1 to 14, characterized in that the blocking element (182) has a bearing surface (186), with which the blocking element (182) on a contact surface (194) of the retaining element (126) can be applied to the retaining element ( 126) in the retention position. Movement damping device according to one of claims 1 to 15, characterized in that the blocking element (182) has a run-on slope (184), with which the locking element (182) against the retaining element (126) starts when the locking element (182) in the Pulling out direction (106) opposite insertion direction (108) moves, and by which the retaining element (126) is moved from the release position to the retaining position. Motion damping device according to one of claims 1 to 16, characterized in that the locking device (136) is rigidly connected to the damper housing (142). Motion damping device according to one of claims 1 to 17, characterized in that the locking device (136) comprises a holder (138) for the damper housing (142). Motion damping device according to one of claims 1 to 18, characterized in that the position of the blocking element (182) relative to the damper housing (142) is adjustable. Motion damping device according to one of claims 1 to 19, characterized in that the locking device (136) comprises a connecting device (140) for fixing the locking device (136) on a guide rail (104) of an extension guide (100). Motion damping device according to one of claims 1 to 20, characterized in that the retaining device (118) comprises a connecting device (110, 114, 120) for fixing the retaining device (118) on a guide rail (102) of an extension guide (100). Motion damping device according to one of claims 1 to 21, characterized in that the end region of the piston rod (152) has a constriction (170), in which the retaining element (126) engages in the retaining position. Motion damping device according to one of claims 1 to 22, characterized in that the end region of the piston rod (152) has a run-on slope (178), with which the piston rod (152) against the retaining element (126) starts when in the extension direction ( 106) opposite insertion direction (108) against the retaining element (126) moves. Motion dampening device according to one of claims 1 to 23, characterized in that the end portion of the piston rod (152) has a locking surface (180), with which the piston rod (152) on the retaining element (126) abuts, while the piston rod (152) prevented therefrom is to follow the movement of the damper housing (142) along the extension direction (106). Motion dampening device according to claim 24, characterized in that the retaining element (126) comprises a retaining claw (130) with a longitudinal direction (198) and that the longitudinal direction (198) of the retaining claw (130) is aligned with the local surface normal (200) of the blocking surface (180). at the point where the locking surface (180) abuts against the retaining claw (130) while preventing the piston rod (152) from following movement of the damper housing (142) along the extension direction (106), an angle of at most approximately 45 °, preferably at most about 20 °, in particular substantially 0 °. An extension guide comprising at least a first guide rail (102) and a second guide rail (104) slidable along a pull-out direction (106) relative to the first guide rail (102), and a motion dampening device (190) according to any one of claims 1 to 25, wherein the retainer (118) on the first guide rail (102) and the damper housing (142) on the second guide rail (104) is arranged.

Images