EP4164450B1 - Self-retracting device - Google Patents

Description

The invention relates to a self-retracting device for a furniture part that can be pulled out of a furniture body in a pull-out direction by means of a pull-out guide and inserted into the furniture body against the pull-out direction, comprising a slide which is displaceably mounted by a base body from a basic position to a waiting position, and a slide into the basic position acting pull-in spring, whereby the carriage can be moved from the basic position to the waiting position by coupling with a driver which can be moved in the pull-out direction against the force exerted by the pull-in spring, in which the driver can be uncoupled from the slide and in which the slide is held against the force of the pull-in spring is, and a damper unit for damping the displacement of the carriage from the waiting position to the home position, which has a part movable in and against the extension direction, which is coupled to the carriage.

Such self-retracting devices are usually integrated into pull-out guides. For example, from the WO 2008/119091 A1 a self-retracting device of this type. The damper unit used to dampen the retraction movement is formed by a pneumatic piston-cylinder unit. Damper units designed in a different way have already been used in self-retracting devices, for example rotation dampers. So that the pull-out furniture part can be pulled out starting from When the pull-out furniture part is fully pushed in, it is not hindered by the damper unit, the damper unit preferably only acts in the direction of insertion. In order not to hinder the retraction via the end section of the retracting movement before the extendable furniture part reaches the fully retracted state, so that the fully retracted state of the extendable piece of furniture is reliably achieved, conventional piston-cylinder units used for damping also have a freewheel over the last section of pushing the piston into the cylinder. In order to still obtain a sufficient damping path, so that even when the pull-out furniture part is pushed forcefully closed, it is reliably braked even when fully loaded, such a freewheel at the end of the retraction path increases the overall required length of the piston-cylinder unit. This also increases the overall length of the self-retracting device. When integrated into a pull-out guide, this means that the pull-out rails have to be made correspondingly shorter. As a result, part of the extension length of the extension device is lost.

In order to increase the retraction force of the self-retraction device in the last section of the retraction path, the following applies according to the teachings of AT 521 511 B1 the retraction spring on a lever which is pivotally mounted relative to the carriage and relative to the base body of the self-retracting device. The axis of rotation formed relative to the base body is displaceable relative to the lever or relative to the base body, in particular by a link arranged in the lever or in the base body, into which a guide pin forming the pivot axis engages. The course of the force exerted on the slide by the retraction spring The pull-in force can be adjusted depending on the position of the carriage.

The object of the invention is to provide an advantageous self-retracting device of the type mentioned, which has a relatively short overall length with a relatively long retraction path. According to the invention, this is achieved by a self-retracting device with the features of claim 1.

In the self-retracting device according to the invention, the carriage is coupled to the movable part of the damper unit via an arm. This arm can be pivoted about a first pivot axis relative to the carriage and about a second pivot axis relative to the damper unit. The first pivot axis is displaceable relative to the arm or the carriage and/or the second pivot axis is displaceable relative to the arm or the movable part of the damper unit. The arm is guided by the base body between a rear end position, which the arm assumes in the basic position of the carriage, and a front end position, which the arm assumes in the waiting position of the carriage. When moving the carriage from the waiting position to the basic position, at least in one end section of the movement of the arm before reaching its rear end position (= in an end section of the retraction path), the arm is rotated about an axis that is perpendicular to the extension direction. As a result, over this end section of the movement of the arm before reaching the rear end position, the distance by which the carriage is displaced is greater than the distance by which the movable part of the damper unit is displaced, preferably by more than twice. It is therefore over the end section of the retraction path from the damper unit Damping force exerted on the carriage is reduced, preferably to less than half.

Freewheeling of the damper in the end section of the movement of the carriage from the waiting position to the basic position can thereby be reduced or preferably eliminated entirely. The required length of the damper can thereby be shortened.

The damper is preferably designed in the form of a piston-cylinder unit, in particular a pneumatically acting one.

To guide the arm, the base body advantageously has a slot into which at least one guide pin of the arm engages. Preferably, two guide pins of the arm engage this link to guide the combined displacement and rotation of the arm. In a modification, an elongated guide pin of the arm could also be provided, which engages in the link of the base body, or two links of the base body could be provided, into which a respective guide pin of the arm engages.

An advantageous embodiment of the invention provides that the pull-in spring engages a spring lever which can be pivoted relative to the base body about a first axis of rotation and relative to the carriage about a second axis of rotation, the first axis of rotation being displaceable relative to the base body or relative to the spring lever. The translation of the spring force onto the slide can therefore be modified via the retraction path of the slide. In particular, the force acting on the carriage in the end section of the displacement of the carriage from the waiting position to the home position (= via the end section of the retraction path) can be increased, to ensure the fully retracted state of the pull-out furniture part.

In a possible embodiment of the invention, the carriage has a tilting part which is pivotably mounted about a tilting axis between an engagement position and a release position. In the basic position of the carriage, the tilting part assumes the engaged position and the driver is coupled to the tilting part. For this purpose, the driver can engage in a recess in the tilting part that is in the engaged position. The driver could also have a recess into which a projection of the tilting part engages. The tilting part is tilted into the release position when the carriage is in the waiting position. This enables the driver to be decoupled from the tilting part, for example by moving the driver out of the recess in the tilting part, and the tilting part is held by the base body against displacement against the pull-out direction. The tilting part also forms a holding device for holding the carriage in the waiting position when the carriage is uncoupled from the driver. Other designs of such a holding device are possible and known. For example, in the end section of the displacement, before reaching the waiting position, the carriage itself could be tilted about an axis perpendicular to the pull-out direction (through a correspondingly curved guide of the base body), whereby the driver can also move out of a recess in the carriage, and the carriage directly by contact be held on a retaining surface of the base body against displacement against the pull-out direction.

When “front” and “back” are mentioned in this description, this refers to the direction of extension.

Fig. 1

eine Ausziehführung mit einer integrierten Selbsteinziehvorrichtung gemäß einem Ausführungsbeispiel der Erfindung, im eingeschobenen Zustand der Ausziehführung;

Fig. 2

eine Schrägsicht entsprechend Fig. 1 im ausgezogenen Zustand der Ausziehführung;

Fig. 3 und 4

Seitenansichten der Ausziehführung im eingezogenen und ausgezogenen Zustand;

Fig. 5

eine Schrägsicht der Ausziehschiene und der Selbsteinziehvorrichtung auf eine gegenüberliegende Seite, die Mittelschiene und Korpusschiene weggelassen;

Fig. 6

eine Schrägsicht der auseinandergenommenen Schienen der Ausziehführung;

Fig. 7

eine Schrägsicht der Selbsteinziehvorrichtung in der Grundstellung des Schlittens;

Fig. 8

eine Schrägsicht entsprechend Fig. 7, in der Wartestellung des Schlittens;

Fig. 9 und 10

Schrägsichten der Selbsteinziehvorrichtung in der Grundstellung und Wartestellung des Schlittens aus einer unterschiedlichen Blickrichtung;

Fig. 11 und 12

Explosionsdarstellungen der Selbsteinziehvorrichtung aus unterschiedlichen Blickrichtungen;

Fig. 13

eine Seitenansicht der Selbsteinziehvorrichtung in der Grundstellung des Schlittens;

Fig. 14

eine Seitenansicht in einer gegenüber der Grundstellung in die Ausziehrichtung verschobenen ersten Zwischenstellung des Schlittens;

Fig. 15

eine Seitenansicht in einer gegenüber Fig. 14 weiter in die Ausziehrichtung verschobenen zweiten Zwischenstellung des Schlittens;

Fig. 16

eine Seitenansicht in der Wartestellung des Schlittens;

Fig. 17 bis 20

Seitenansichten entsprechend den Fig. 13 bis 16 ohne den Grundkörper der Einziehvorrichtung;

Fig. 21 bis 24

Seitenansichten auf die gegenüberliegende Seite der Selbsteinziehvorrichtung in den Stellungen des Schlittens entsprechend den Fig. 13 bis 16;

Fig. 25 bis 28

Seitenansichten entsprechend den Fig. 21 bis 24 ohne den Grundkörper der Selbsteinziehvorrichtung.

Fig. 29 bis 32

stark schematisierte Darstellungen von modifizierten Ausführungsvarianten der Erfindung.

Further advantages and details of the invention are explained below with reference to the accompanying drawing. In this show:

Fig. 1

a pull-out guide with an integrated self-retracting device according to an exemplary embodiment of the invention, in the pushed-in state of the pull-out guide;

Fig. 2

an oblique view accordingly Fig. 1 when the pull-out guide is extended;

3 and 4

Side views of the pull-out guide in the retracted and extended states;

Fig. 5

an oblique view of the pull-out rail and the self-retracting device on an opposite side, the middle rail and body rail omitted;

Fig. 6

an oblique view of the disassembled rails of the pull-out guide;

Fig. 7

an oblique view of the self-retracting device in the basic position of the carriage;

Fig. 8

an oblique view accordingly Fig. 7 , in the carriage's waiting position;

9 and 10

Oblique views of the self-retracting device in the basic position and waiting position of the carriage from a different viewing direction;

Fig. 11 and 12

Exploded views of the self-retracting device from different viewing directions;

Fig. 13

a side view of the self-retracting device in the basic position of the carriage;

Fig. 14

a side view in a position shifted in the pull-out direction compared to the basic position first intermediate position of the carriage;

Fig. 15

a side view in a opposite Fig. 14 second intermediate position of the slide further shifted in the pull-out direction;

Fig. 16

a side view of the carriage waiting;

Fig. 17 to 20

Side views according to the Fig. 13 to 16 without the base body of the retraction device;

Fig. 21 to 24

Side views of the opposite side of the self-retracting device in the positions of the carriage according to Fig. 13 to 16 ;

Fig. 25 to 28

Side views according to the Fig. 21 to 24 without the base body of the self-retracting device.

Fig. 29 to 32

highly schematic representations of modified embodiment variants of the invention.

A first embodiment of the invention is in the Fig. 1 to 28 shown. The self-retracting device is integrated into a pull-out guide, which in the exemplary embodiment shown includes a body rail 1, a middle rail 2 and a pull-out rail 3. The pull-out guide is designed here in the manner of a differential pull-out guide, in which the middle rail 2 travels half the distance of the pull-out rail 3 when it is pulled out and pushed in. As shown, all rollers can be arranged on the middle rail 2. The pull-out guide can be designed in a conventional manner and the arrangement of the rollers and their functionality do not need to be explained in more detail here.

A self-retracting device according to the invention can also be integrated into other types of pull-out guides, for example in a pull-out guide which only has a body rail and a pull-out rail.

The pull-out rail 3 is pulled out, starting from the fully inserted state, in a pull-out direction 4, and the pull-out rail 3 is pushed in counter to the pull-out direction 4.

Only in Fig. 2 Parts of a furniture body 50, on which the body rail 1 is to be mounted, and a pull-out furniture part 51, on which the pull-out rail 3 is to be mounted, are indicated with dashed lines.

The self-retracting device has a base body 5, of which a carriage 6 parallel to the pull-out direction 4 between a basic position ( Fig. 7 , 9 , 13 , 17 , 21 and 25 ) and a waiting position ( Fig. 8 , 10 , 16 , 20 , 24 and 28 ) is mounted displaceably.

For the displaceable guidance of the carriage 6, it has grooves 7 on both sides, into which mutually directed webs 8 of the base body 5, which run parallel to the pull-out direction 4, engage. For example, the carriage 6 could also have projecting guide pins for displaceable guidance on the base body 5, which engage in slots in the base body, for example in the form of elongated holes.

A tilting part 9 is mounted on the carriage 6 so that it can pivot (=rotate) about a tilting axis 10 (which could also be referred to as a pivot or rotation axis). In the basic position of the carriage 6, the tilting part 9 assumes an engaged position with respect to its pivoting about the tilting axis 10, and in the waiting position of the carriage 6 it assumes a release position. The tilt axis 10 can be used, for example, by means of axle journals 11 Tilting part 9 are formed, which engage in axle recesses 12 of the carriage 6.

The tilt axis 10 is perpendicular to the pull-out direction 4 and is preferably horizontal.

A pull-in spring 13 engages a spring lever 14. The spring lever 14 can be pivoted relative to the base body 5 about a first axis of rotation 15 and relative to the carriage 6 about a second axis of rotation 16. The first axis of rotation 15 is displaceable relative to the base body 5 and immovable relative to the spring lever. The second axis of rotation 16 is immovable relative to the carriage 6 and relative to the spring lever. For the displaceability of the first axis of rotation 15 relative to the base body 5, it can be provided, for example, that the spring lever 14 has an axle pin 17, which engages in a spring lever link 18 of the base body 5, here formed by a curved elongated hole. The pull-in spring 13 engages a fastening pin 19 of the spring lever 14, which lies between the first and second rotation axes 15, 16.

The second axis of rotation 16 is formed, for example, by axle journals 20 of the spring lever 14, which engage in axle recesses 21 of the tilting part 9.

The first and second axes of rotation 15, 16, which are parallel to one another, are perpendicular to the pull-out direction 4 and are preferably horizontal.

By engaging the pull-in spring on the spring lever 14 in conjunction with the displaceability of the first axis of rotation in a corresponding direction (which is also in Can change depending on the position of the carriage), a change in the translation of the spring force acting on the carriage is achieved depending on the position of the carriage. A greater change in the length of the spring occurs over a distance of displacement of the carriage following the basic position of the carriage than over the same distance of displacement of the carriage when it is closer to the waiting position. Thus, over the last section of the retraction path before reaching the basic position of the carriage, the spring force acting on the carriage can be increased compared to a direct attack of the retraction spring on the carriage.

A damper unit 22 is used to dampen the displacement of the carriage 6 from the waiting position to the basic position. This has, for example, a hydraulically pneumatically acting piston-cylinder unit 22a as a damper. The cylinder is immovably connected to the base body 5. The piston rod is connected to a movable part 22b of the damper unit, which is guided by the base body 5 so that it can move parallel to the pull-out direction 4. Only the movement of the movable part 22b against the pull-out direction is dampened by the piston-cylinder unit 22a, while the movement of the movable part 22b in the opposite direction is undamped. Such dampers, which have a freewheel in a direction of movement, in particular pneumatically acting, are known.

A kinematically reversed arrangement of the piston-cylinder unit is also conceivable and possible, i.e. the piston rod is immovable relative to the base body 5 and the cylinder is displaceable and is immovably connected to a movable part of the damper unit.

The movable part 22b of the damper unit 22 is coupled to the carriage 6 via an arm 23. The arm 23 can be pivoted (=rotated) relative to the carriage 6 about a first pivot axis 24 and relative to the movable part 22b of the damper unit 22 about a second pivot axis 25. The second pivot axis 5 can be formed, for example, as shown, by an axle journal 26 of the movable part 22b of the damper unit 22, which engages in an axle recess 27 of the arm 23. The first pivot axis 24 can, for example, be formed, as shown, by an axle journal 28 of the carriage 6, which engages in an elongated hole 29 of the arm 23.

The first pivot axis 24 is displaceable relative to the arm 23 and immovable relative to the carriage 6, while the second pivot axis 25 is immovable relative to the arm 23 and relative to the movable part 22b of the damper unit 22.

The first and second pivot axes 24, 25, which are parallel to one another, are perpendicular to the pull-out direction 4 and are preferably horizontal.

The arm 23 is movably mounted by the base body 5 between a rear end position and a front end position. The arm 23 occupies the rear end position in the basic position of the carriage 6. The arm 23 occupies the front end position in the waiting position of the carriage 6. In the front end position, the arm 23 is shifted in the pull-out direction relative to the rear end position and pivoted about an axis that is perpendicular to the pull-out direction 4 and is horizontal in the exemplary embodiment. This axis around which the arm 23 in the front end position is pivoted relative to the rear end position, is formed in the exemplary embodiment by the second pivot axis 25.

To guide the arm 23, the base body 5 has a link 30, into which the first and second guide pins 31, 32 of the arm 23 engage.

In a rear end section of the link 30, the link 30 has bulges downwards and upwards, in which the guide pins 31, 32 lie in the rear end position of the arm 23.

In the exemplary embodiment shown, the link 30 also has bulges downwards and upwards in a front end section, in which the guide pins 31, 32 lie in the front end position of the arm 23.

The driver 33, which interacts with the slide 6 via the tilting part 9, is formed in the exemplary embodiment by a section of the pull-out rail 3, cf. Fig. 5 . A downwardly projecting web 3a of the profile, which forms the pull-out rail 3, has a projection forming the driver 33 in the area of a rear end.

In the basic position of the carriage 6, in which the tilting part 9 is in its engaged position, the driver 33 engages in a recess 9a of the tilting part. The pull-out rail 3 is in its fully retracted position.

If the pull-out rail 3 is pulled out in the pull-out direction 4 starting from its fully inserted position, so the driver 33 pulls the carriage 6 via the tilting part 9, starting from its basic position in the pull-out direction 4, against the force of the pull-in spring 13, which is transmitted to the carriage 6 via the spring lever 14, in the direction of its waiting position. In the last section of the displacement of the carriage 6, until it reaches the waiting position, the tilting part 9 pivots about the tilting axis 10 from its engaged position into the release position. In the release position, the driver 33 can extend out of the recess 9a of the tilting part 9.

In the release position of the tilting part 9, a retaining section 9b of the tilting part 9 rests on a retaining surface 5a of the base body. By resting the retaining section 9b on the retaining surface 5a, the carriage is prevented from being displaced by the force of the pull-in spring 13 from the waiting position towards the basic position. The carriage 6 thus remains in the waiting position.

When moving the carriage from the basic position towards the waiting position, the tilting part is initially blocked by the base body against tilting about the tilting axis 10, in particular by a displaceable guide of the tilting part parallel to the pull-out direction 4 from the base body. In the exemplary embodiment, grooves 9d on both sides of the tilting part 9 engage in the webs 8 of the base body. In the last section of the displacement of the carriage 6, before it reaches the waiting position, the grooves 9d extend from the front ends of the webs 8, so that the tilting part 9 can be pivoted from the engaged position into the release position.

If, when the pull-out rail 3 is pushed in, the driver 33 comes into contact with the contact surface 9c at the rear end of the recess 9a, the tilting part 9 is pivoted from the release position into the engagement position, in which the driver 33 engages in the recess 9a of the tilting part 9. The displacement of the carriage 6 in the direction of its basic position is thereby released and the pull-in spring 13 pulls the carriage 6 and with it the driver 33 against the pull-out direction 4 until the carriage 6 reaches the basic position. This movement of the carriage over the retraction path extending from the waiting position to the basic position is dampened by the damper unit 22.

When the carriage 6 is moved from the waiting position towards the basic position, in an initial section of the retraction path, the arm 23 is first rotated about an axis perpendicular to the extension direction, in the exemplary embodiment about the second pivot axis 25. This allows the movement of the carriage to be reduced 6 on the movable part 22b of the damper unit 22 can be achieved. The distance of displacement of the carriage 6 against the pull-out direction 4 is therefore greater than the distance of displacement of the movable part 22b of the damper unit. The onset of the damping effect of the damper unit 22 is therefore less abrupt.

This rotation of the arm 23 in the initial section of the retraction path could also be omitted. The bulges of the backdrop in its front end section could be omitted.

This is followed by a middle section of the retraction path, over which the arm 23 is displaced by the carriage 6 against the extension direction 4 without rotating the arm 23. In this middle one In this section, the movement of the carriage 6 is transferred 1:1 to the movable part 22b of the damper unit.

In an end section of the retraction path (= end section of the movement of the carriage before reaching its basic position) and thus in an end section of the movement of the arm before reaching its rear end position, the arm 23 is further rotated (in the same direction of rotation as in the initial section) at right angles Axis standing in relation to the pull-out direction, in the exemplary embodiment around the second pivot axis 25. This means that in the end section of the pull-in path, the movement of the carriage 6 can be reduced to the movement of the movable part 22b of the damper unit 22. Over this end section of the retraction path, the distance of displacement of the carriage is therefore greater than the distance of displacement of the movable part 22b of the damper unit 22, preferably at least twice as great.

The rotation of the arm 23 about the axis perpendicular to the pull-out direction 4 (which in the exemplary embodiment is formed by the second pivot axis 25) is caused by the force acting on the arm 23 in the area of its first pivot axis 24 from the retraction spring 13 via the spring lever 14 and the carriage 6 is exercised.

In the exemplary embodiment, the movable part 22b of the damper unit is guided by engagement of the axle journal 26 and a further guide pin 34 of the movable part 22b into the link 30 of the base body 5. Other types of displaceable guidance can be provided, for example via a separate link in the base body or via a strip on one of the two parts, which engages in a groove on the other of the two parts.

Fig. 29 to 31 show highly schematic embodiment variants of the coupling of the carriage 6 with the damper unit 22 via the arm 23.

The movable and pivotable mounting of the arm on the base body is in the Fig. 29 to 31 not shown. This can be carried out analogously as described above.

According to Fig. 29 the first pivot axis 24 is displaceable relative to the carriage 6 (and immovable relative to the arm 23), while the second pivot axis 25 is immovable relative to the movable part 22b of the damper unit 22 and the arm 23. To move the first pivot axis 24 relative to the carriage 6, the latter has, for example, an elongated hole 35 into which an axle journal of the arm 23 engages.

According to Fig. 30 the first pivot axis 24 is immovable relative to the carriage 6 and relative to the arm 23, while the second pivot axis 25 is displaceable relative to the arm 23 and is immovable relative to the movable part 22b. To enable the second pivot axis 25 to be displaced relative to the arm 23, the latter has, for example, an elongated hole 36 into which an axle journal of the movable part 22b of the damper unit 22 engages.

According to Fig. 31 the first pivot axis 24 is immovable relative to the arm 23 and relative to the carriage 6, while the second pivot axis 25 is displaceable relative to the movable part 22b of the damper unit 22 and immovable relative to the arm 23. For the displaceability of the second pivot axis 25 relative to the movable part 22b Damper unit 22 has, for example, an elongated hole 37 into which an axle bolt of arm 23 engages.

In the version of Fig. 29 The rotation of the arm 23 takes place again around the second pivot axis 25, while in the embodiment variants according to 30 and 31 the rotation of the arm 23 about the first pivot axis 24 takes place.

Fig. 32 shows in a highly schematic manner a modified design of the transmission of the pull-in force of the pull-in spring 13 to the carriage 6. The spring lever 14 can be pivoted relative to the base body 5 about a first axis of rotation 15 and relative to the carriage 6 about a second axis of rotation 16. The first axis of rotation 15 is immovable relative to the base body 5 and displaceable relative to the spring lever 14. For this purpose, the spring lever 14 has, for example, a spring lever link 38, into which an axle journal of the base body 5 engages.

Further modifications of the exemplary embodiment shown are conceivable and possible without departing from the scope of the invention as defined in the claims. For example, both the first pivot axis 24 and the second pivot axis 25 could be displaceable relative to one of the two parts, which are connected to one another via the respective pivot axis 24, 25. The pivoting of the arm 23 during its rotation would then take place about an imaginary axis defined by the guidance of the arm 23 on the base body 5 and standing at right angles to the pull-out direction 4, which would in turn preferably lie horizontally.

The movement of the carriage between the basic position and the waiting position could also be along a curved path take place. This could result in an overall tilting of the carriage, so that a separate tilting part could be omitted.

Legend to the reference numbers

1 Body rail 22b moving part 2 Middle rail 23 poor 3 Pull-out rail 24 first pivot axis 3a web 25 second pivot axis 4 pull-out direction 26 axle journal 5 Base body 27 Axle recess 5a retention surface 28 axle journal 6 Sleds 29 Long hole 7 Nut 30 Backdrop 8th web 31 first guide pin 9 Tilting part 32 second guide pin 9a deepening 33 taker 9b Retention section 34 Guide pin 9c contact surface 35 Long hole 9d Nut 36 Long hole 10 Tilt axis 37 Long hole 11 axle journal 38 Spring lever backdrop 12 Axle recess 50 Furniture body 13 Retraction spring 51 extendable furniture part 14 Spring lever 15 first axis of rotation 16 second axis of rotation 17 axle journal 18 Spring lever backdrop 19 Fastening pin 20 axle journal 21 Axle recess 22 Damper unit 22a Piston-cylinder unit

Claims (10)

1. Self-retracting device for a furniture part which can be pulled out of a furniture carcass (50) in a pull-out direction (4) by means of a pull-out guide and pushed into the furniture carcass (50) in the opposite direction to the pull-out direction (4), comprising

   - a slide (6) mounted on a base body (5) so as to be displaceable from a home position to a waiting position,

   - a retraction spring (13) acting on the slide (6) into the home position, the slide (6) being displaceable from the home position into the waiting position by coupling with a driver (33) movable in the pull-out direction (4) against the force exerted by the retraction spring (13), in which waiting position the driver (33) can be uncoupled from the slide (6) and in which the slide (6) is held against the force of the retraction spring (13), and

   - a damper unit (22) for damping the displacement of the slide (6) from the waiting position to the home position, which has a part (22b) movable in and against the pull-out direction (4), which is coupled to the slide (6),

   characterized in that the slide (6) is coupled to the movable part (22b) of the damper unit (22) via an arm (23) which is pivotable relative to the slide (6) about a first pivot axis (24) and relative to the damper unit (22) about a second pivot axis (25), wherein the first pivot axis (24) is displaceable relative to the arm (23) or the slide (6) and/or the second pivot axis (25) is displaceable relative to the arm (23) or the movable part (22b) of the damper unit (22), and which is displaceable by the base body (5) between a rear end position, which the arm (23) takes up in the basic position of the slide (6), and a front end position, which the arm (23) takes up in the basic position of the slide (6), and a front end position, which the arm (23) takes up in the waiting position of the slide (6), wherein when the slide (6) is displaced by the retraction spring (13) over a retraction path from the waiting position into the home position of the slide (6), the arm (23) is rotated about an axis perpendicular to the extension direction (4) at least in one end section of the retraction path and the distance of displacement of the slide (6) over this end section of the retraction path is greater than the distance of displacement of the movable part (22b) of the damper unit (22) .
2. Self-retracting device according to claim 1, characterized in that the base body (5) has a link (30) for guiding the arm (23), in which at least one guide pin (34) of the arm (23) engages.
3. Self-retracting device according to claim 1 or 2, characterized in that

   - the first pivot axis (24) is either formed by a pivot pin arranged on the carriage (6), which is displaceably mounted in an elongate hole of the arm (23), or is formed by a pivot pin arranged on the arm (23), which is displaceably mounted in an elongate hole of the carriage (6), and/or

   - the second pivot axis (25) is formed either by a pivot pin arranged on the damper unit (22), which is displaceably mounted in an elongate hole in the arm (23), or by a pivot pin arranged on the arm (23), which is displaceably mounted in an elongate hole in the movable part (22b) of the damper unit (22).
4. Self-retracting device according to one of claims 1 to 3, characterized in that the movable part (22b) of the damper unit (22) is guided by the base body (5) so as to be displaceable parallel to the direction of extraction (4) .
5. Self-retracting device according to one of claims 1 to 4, characterized in that the retracting spring (13) acts on a spring lever (14) which can be pivoted about a first axis of rotation (15) with respect to the base body (5) and about a second axis of rotation (16) with respect to the slide (6), the first axis of rotation (15) being displaceable either with respect to the base body (5) or with respect to the spring lever (14).
6. Self-retracting device according to claim 5, characterized in that the first axis of rotation (15) is formed by a pivot pin arranged either on the spring lever (14) or on the base body (5), which pivot pin is displaceably mounted in a spring lever link (38).
7. Self-retracting device according to claim 6, characterized in that the spring lever link (38) has a curved course.
8. Self-retracting device according to one of claims 5 to 7, characterized in that the retracting spring (13) engages on the spring lever (14) in the region between the first and the second axis of rotation (15, 16).
9. Self-retracting device according to one of claims 1 to 8, characterized in that the slide (6) has a tilting part (9) mounted so as to be pivotable about a tilting axis (10) between an engagement position and a release position, the tilting part (9) being located in the engagement position in the basic position of the carriage (6), in which the driver device is coupled to the tilting part (9), and in the waiting position of the slide (6) is tilted into the release position, in which uncoupling of the driver (33) from the tilting part (9) is possible and the tilting part (9) is held by the base body (5) against displacement in the opposite direction to the pull-out direction (4).
10. Pull-out guide comprising at least two rails which are displaceable relative to one another, of which one carcass rail (1) can be attached to a furniture carcass (50) and of which one pull-out rail (3) can be attached to an extendable furniture part (51), characterized in that the pull-out guide has a self-retracting device according to one of claims 1 to 9, the base body (5) being arranged on one of the rails (1, 3) of the pull-out guide and the driver (33) being arranged on another of the rails (1, 3) of the pull-out guide.

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