DE20311064U1 - Telescopic guide for drawers, comprises plastic telescopic parts with integrally formed movement restricting and guide parts - Google Patents

Abstract

The telescopic parts (2, 3) are integrally joined to their guide parts and movement-restricting parts and are made from plastic.

Description

Telescopic guide

The invention relates to a telescopic guide for drawers or the like with at least a first and a second telescopic member, which are displaceable into one another on a displacement path and are mounted so as to be guided by guide elements, as well as with limiting elements for limiting the displacement path.

Such telescopic guides are usually made up of a large number of individual parts that have to be manufactured and assembled at great expense. In addition, to ensure that the individual telescopic links can be moved smoothly relative to one another, a complex roller guide or ball bearing guide is usually used, which is correspondingly complex to assemble and adjust. Such telescopic guides preferably also have limiting elements in the form of rubber rings that are pushed on, but these have to be assembled in an additional work step, can easily get lost and age, i.e. can harden and become brittle, so that they must be replaced if the design of the respective telescopic guide allows it. In order to achieve easy movement, the telescopic links are guided into one another with a certain amount of play, which can cause rattling or similar annoying noises when used, particularly with metal telescopic guides.

The object of the invention is therefore to provide a less complex telescopic guide.

The object is achieved by providing a telescopic guide of the type mentioned at the beginning, the individual telescopic links of which are formed in one piece with the respective guide elements and the respective limiting elements and are made of plastic. This proposes a telescopic guide which can be assembled ready for use from the individual one-piece telescopic links without the additional use of end caps, bearings and the like. The telescopic guide therefore contains no small parts which have to be additionally manufactured and assembled and which can easily be lost. The one-piece design made of plastic, in particular injection-molded plastic, greatly simplifies production overall. Advantageously compared to conventional telescopic guides made of metal, the telescopic guide made of plastic according to the invention is characterized by its low weight. Furthermore, such a telescopic guide does not require any grease and/or lubricant fillings which are usually used for the bearing and guide elements in metal telescopic guides, which may have to be used up and replaced during use and which the user may come into contact with. Furthermore, corrosion can occur on a metal telescopic guide, which can at least affect the appearance, if not the function, and can contribute to the corresponding noise development. Furthermore, a telescopic guide made of plastic is insensitive to dirt and dust. In a further development, the telescopic guide is made of a plastic that has particularly good sliding and/or wear properties.

In a further development, the limiting elements on the first telescopic member have a first latching hook with a latching projection and on the second telescopic member a first receiving groove running in the direction of displacement for receiving the latching projection in the assembled state of the telescopic guide, wherein the first receiving groove is provided with at least one transverse limit as a stop for the first latching hook and wherein the first latching hook is perpendicular to the second receiving groove

· 4

is elastically deflectable and is formed on the first telescopic link in such a way that when the two telescopic links are joined together, it can be guided over the stop into the first receiving groove with the locking projection under elastic pre-tension. This proposes a design principle that is easy to handle in practice and enables the parts to be joined together quickly and easily without the need for any additional tools. In order to decouple the telescopic links again, the locking hook can be elastically deflected in the same way and guided over the stop out of the first receiving groove, which makes it easy to replace individual telescopic links or to insert further telescopic links in between.

When guided into the receiving groove via the stop, the stop limits the displacement path on one side. Of course, it is conceivable that in a further development of the invention a further stop to limit the displacement path is arranged in the first telescopic member, i.e. that the stops limit the first receiving groove on both sides and thus determine the length of the displacement path via the length of the receiving groove.

In a further development, the locking projection protruding into the first receiving groove can be displaceably supported on the side walls and/or on the groove base of the receiving groove, so that the locking projection can simultaneously serve as a guide element, since it rests against the receiving groove in a force-fitting manner in the direction of the groove base and/or in the direction of the side walls.
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In a preferred development of the invention, the first locking hook is arranged laterally in a perpendicular to the direction of displacement opening in the first telescopic member. This allows the locking hook to be freely elastically deflected in the direction of the opening. Furthermore, the locking hook is easily accessible from two sides.

It is also conceivable that the locking hook is arranged laterally in a recess, the opening of which is located above the receiving groove when the telescopic guide is in the joined state and the depth of which is sufficiently large to be able to guide the locking projection into the first receiving groove with elastic deflection of the locking hook over the stop.

A further embodiment of the invention is proposed in which the locking projection is formed on the first telescopic member via a locking tongue. It is also provided that the locking projection can be guided on and/or via the locking tongue in the direction of displacement against the stop so that it can be elastically deflected. In a further development, the stop can be designed so that it can be elastically deflected in the direction of displacement. The elastic deflectability of the locking hook can thus be determined, among other things, by the design of the tongue, i.e. its length and its cross-sectional profile over the length. In this case, it is conceivable that the locking tongue in a further development of the invention has a curved shape extending in the longitudinal direction of the locking hook, a wave-shaped profile, or a profile with a band that bends back and forth, whereby the elastic deformability of the locking tongue in the longitudinal direction can be increased. By having the locking projection strike the stop elastically, an immediate, sudden braking of the part telescoped by the telescopic guide is avoided. If, as proposed in another development, the locking projection extends from the tongue on one side at the end of the tongue, it can also be guided in this way with its free end elastically deflectable in the direction of displacement against the stop.

In a further development, the elastic striking of the locking hook against the stop can be achieved additionally or solely by an elastic deflection of the stop in the direction of displacement. For this purpose, the stop can, for example, be formed on only one side of the second telescopic member in such a way that it can be elastically deflected in the direction of displacement, acting as a leaf spring. Furthermore, other spring-

Similar designs of the stop, for example as a spiral spring, are conceivable.

A further embodiment of the invention is proposed in which the opening is guided through a contact surface of the telescopic member, with which the first telescopic member rests against a mounting surface of the drawer after installation. Furthermore, in this embodiment, the first locking hook with its side facing the contact surface is spaced at a distance from the mounting surface at most such that the distance is less than the depth with which the locking projection protrudes over the stop into the first receiving groove. If the first locking hook with its side facing the mounting surface moves towards the mounting surface, this still ensures that the locking projection continues to strike against the stop and does not move over the stop and out of the first receiving groove, so that the two telescopic members cannot be uncoupled inadvertently.

In a preferred development, the first locking hook is provided with a contact projection on a side opposite the locking projection, which forms the limit of the distance to the first locking hook. As a result, a distance defined by the locking projection is formed at a defined point.

Of course, it is conceivable that instead of the locking projection, the locking tongue, for example, has a shape that is curved towards the mounting surface, so that the distance is defined by the curvature.

In an advantageous further development, the opening is designed in the form of a slot on the front side of the first telescopic member, in which the first locking hook extends in the longitudinal direction. As a result, the arrangement of the locking hook on the front side of the first telescopic member positions one limitation of the displacement path in such a way that the displacement path towards this side is maximized. Furthermore, the

The locking hook is particularly easily accessible and can be easily deflected to overcome the stop when joining the telescopic links.

It is considered advantageous if the limiting elements in a further development of the invention have a stop web on the first telescopic member, against which the second telescopic member can be guided with a stop surface when the telescopic guide is assembled. This proposes a stop web that serves to further limit the displacement path. The elastic deflectability of the stop web means that a "soft" stop can be achieved, similar to the stop described above. This stop web can, for example, have a similar shape to the above-mentioned design of the stop, in that it acts like a leaf spring when molded onto the first telescopic member on one side. Other spring-like designs of the stop web, as described above, are also conceivable.

It is considered advantageous if the stop surface is formed by at least a section of the front side of the first telescopic member. By arranging the stop surface on the front side of the second telescopic member, the possible size of the displacement path to this side is maximized. This also proposes a particularly simple design of the stop surface that does not require any special structural precautions. It is also conceivable that the section of the front surface also has spring-like elements that can be compressed in the direction of displacement, as described above in connection with the stop and the stop surface.

In an advantageous further development, the first receiving groove has at least one locking groove in its groove base that runs transversely to its longitudinal direction. It is also provided that the locking projection in the assembled state of the telescopic guide

tion rests under prestress on the groove base of the first receiving groove in such a way that the locking projection can be releasably locked into the locking groove. This allows the locking projection to be locked in a certain position and, with slight pressure in the direction of displacement, moved out of the locking groove again. This allows the locking projection to be easily locked at certain points, such as, for example and preferably, at the two end positions of the displacement path. This is particularly advantageous with regard to the end points of the displacement path, so that the drawer can only be pulled out of its rest position with slight resistance and can only be pushed back again from the fully telescoped, pulled-out state with slight resistance. Of course, the arrangement of locking grooves at certain desired points on the groove base of the displacement path is also conceivable in order to provide preferred positioning of the drawer on the displacement path.

In an advantageous further development, the locking projection in the section with which it can lock into the locking groove has a shape adapted to the locking groove, which can be designed, for example, as a rounding or tapering of the section. An asymmetrical cross-sectional shape of the locking groove and the locking projection section is also conceivable, which rises more steeply towards the stop than towards the receiving groove, so that locking and unlocking can be carried out accordingly easily.

In a further embodiment of the invention, the guide elements of the telescopic members have a tongue and groove connection, whereby the first telescopic member has two first lateral guide grooves that are opposite one another and run in the direction of displacement, and the second telescopic member has two guide springs that are aligned with one another, point in opposite directions and are adapted to the guide grooves and can be inserted into the first guide grooves in the direction of displacement. By pushing both telescopic members into one another,

an exact guidance of the telescopic links into each other over the displacement path can be achieved. The guide springs can point either inwards or outwards, with the guide grooves being aligned outwards 5 or inwards depending on the orientation of the guide spring. It is of course also possible to provide a guide spring for the first telescopic link and appropriately adapted guide grooves for the second telescopic link.

In a preferred development, the guide elements have at least one stabilizing spring for stabilizing the position of one of the two guide springs in the associated guide groove. These stabilizing springs primarily serve to guide the telescopic members, which can be moved into one another, into one another with as little play as possible in order to largely avoid movement of the telescopic members into one another perpendicular to the direction of movement, which can lead to rattling or similar annoying noises when using the telescopic guide.

In a further development, the stabilizing spring is designed as a leaf spring with a spring bar formed by an opening in the guide spring and running in the direction of displacement. The spring bar runs essentially in the longitudinal direction of the telescopic member, bulges perpendicularly to the direction of displacement over the end section of the guide spring and, when the telescopic guide is assembled, rests against the base of the guide groove. This minimizes the play between the groove and the spring and prevents rattling or the like. The embodiment proposed here describes a stabilizing spring that is very easy to manufacture within the proposed one-piece design of a telescopic member. The opening can be designed, for example, as an oval elongated hole whose larger axis extends in the direction of displacement. Other shapes of the opening are also conceivable, such as oval, polygon or triangle.

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In the case of a triangular shape, one tip of the triangle should preferably point towards the base of the guide groove. By using such a stabilizing spring, the contact surface of the guide spring with the corresponding guide groove is reduced, so that despite the minimization of the play between the guide spring and the guide groove, only a correspondingly low friction force can occur. It is of course conceivable that a stabilizing spring is provided on the guide groove, which rests against the guide spring.

In a further preferred embodiment of the invention, a third telescopic member is provided for the telescopic guide, the second telescopic member forming the middle member and the first and third telescopic members forming the end members of the telescopic guide, and the limiting elements having a second latching hook on the third telescopic member and a first and a second receiving groove on the second telescopic member for receiving the latching projection of the first latching hook of the first telescopic member and the second latching hook of the third telescopic member when the telescopic guide is assembled. The latching projections can be guided under elastic prestress over the stop of the respective receiving groove into the respective receiving groove. The individual latching hooks with the latching projections and the respective associated receiving grooves can be designed to have the same or different dimensions. It is of course conceivable that in a telescopic guide with three or more telescopic members, all telescopic members have a latching hook and a receiving groove, the latching hook of one telescopic member engaging in the receiving groove of one of the two adjacent telescopic members and the receiving groove being able to receive the latching hook of the other adjacent telescopic member. Finally, it is also possible to have a telescopic link with two locking hooks, each of which engages in the corresponding receiving groove of the adjacent telescopic links.@@

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In a particularly preferred development, the first and second receiving grooves are arranged on opposite longitudinal sides of the second telescopic member (3) and are at least partially offset over the length of the second telescopic member (3). This arrangement allows the individual telescopic members to mesh with one another within a certain section in order to set a certain maximum displacement path in optimization with a minimum size of the section in which the telescopic members mesh with one another in the guide groove and guide spring in the maximum deflection state and hold one another sufficiently stable and resilient.

A further development of the invention is considered advantageous in which the second telescopic member is provided with a U-profile on two opposite side surfaces, the legs of the U-profiles being designed as guide springs aligned in pairs. Furthermore, the first and third telescopic members are each provided with two guide grooves into which the respectively assigned, aligned second guide springs of the second telescopic member can be inserted in the direction of displacement. The arrangement of the guide springs in the middle telescopic member and the guide grooves in the end members means that the telescopic members can be pushed completely into one another. Of course, the reverse design is also conceivable, in which the two end members have the guide spring and the middle member has the guide grooves.

Preferably, individual or all telescopic members have conventional reinforcing ribs and/or honeycomb structures, which enable increased rigidity of the telescopic members while simultaneously reducing weight and saving material.

In a further development, a fastening device is provided on the end links for fastening the end links to the drawer position and to the furniture part in the drawer position. Preferably, these fastening openings point perpendicular to the contact surface

through which a screw or the like can be guided for fastening to the drawer. These fastening openings are preferably made in the section of the end link which remains uncovered by the middle section when the telescopic guide is deflected. This means that such a telescopic guide can be installed by pushing the individual links with their guide grooves and springs into one another in the direction of displacement, with the respective locking hook resting under pre-tension on the outside facing the locking hook with the receiving groove, but without yet being inserted into the receiving groove. By sliding the telescopic links into one another, the locking hook with the locking projection can be guided into the receiving groove, into which it can snap thanks to its pre-tension. The locking projection can rest on the groove base of the receiving groove in order to be able to snap into one of the locking grooves arranged transversely to the direction of displacement. In the assembled and deflected state, the telescopic guide can be fastened to the corresponding mounting surface of the drawer or the like via the fastening device with the contact surface. The contact projection also determines a maximum distance between the locking hook and the mounting surface, which is dimensioned such that the locking projection cannot be guided out of the receiving groove again past the first and second stop when mounted. This prevents the telescopic links from being accidentally detached from one another.

Of course, it is conceivable that the telescopic guide can alternatively be attached to the drawer using spring clips or snap fasteners, for example.
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The invention is explained in more detail below using an embodiment with an associated drawing. The drawing shows:

Fig. la-c a cross-sectional view of a telescopic guide with three telescopic links in the deflected,

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half-deflected and in the undeflected state,

Fig. Id a section C according to figure la,

Fig. 2a a top view of the telescopic guide in the deflected state,

Fig. 2b a front view of the telescopic guide

Fig. 2c is a cross-sectional view of the telescopic guide according to the cross-sectional profile F-F in Fig. 2a and

Fig. 3a-c a cross-sectional view of the telescopic guide in three stages of pushing together the individual telescopic members to form the telescopic guide.

Figures 1a-c and figures 2a-c show a cross-sectional view of a telescopic guide 1 for drawers or the like with three telescopic members, a first telescopic member 2, a second telescopic member 3 and a third telescopic member 4, wherein the first and third telescopic members 2, 4 are arranged as end members and the second telescopic member 3 as the middle member in the telescopic guide. The telescopic members 2-4 are each mounted so as to be displaceable in one another in the direction of displacement V over a displacement path W. The individual telescopic members 2-4 are made in one piece and preferably from plastic.

In the embodiment of the telescopic guide 1 shown here, the first telescopic member 2 has a first locking hook 5 and the third telescopic member 4 has a second locking hook 6 as limiting elements. Both locking hooks 5, 6 are each provided with a locking projection 7 and a locking tongue 8, whereby they are formed via the locking tongues 8 on the respective telescopic member 2, 4 so as to be elastically deflectable perpendicular to the direction of displacement V. The second telescopic member 3 is attached to the first telescopic member 2, 4.

telescope member 2 is provided with a first receiving groove 9 on the longitudinal side opposite the telescope member 2 and with a second receiving groove 10 on the longitudinal side facing the telescope member 4 for receiving the respective locking hook 5, β of the telescope members 2, 4. The receiving grooves 9, 10 are arranged offset over the length of the second telescope member 3 and run out at the ends of the second telescope member 3 without a transverse limitation, while on the other side they are each provided with a transverse limitation which serves as a stop 11 for limiting the displacement path W of the respective locking hook 5, 6 on this side.

As can be seen in particular from Figure 2a, the locking hook 5 or 6 runs in a slot 12 on the front side of the telescopic member 2 or 4 in the undeflected state essentially in the direction of displacement V. The slot 12 is guided vertically through a contact surface 13, with which the telescopic members 2, 4 rest on an associated mounting surface of the drawer or the piece of furniture receiving the drawer when the telescopic guide 1 is mounted. The locking hooks 5, 6 can be elastically deflected perpendicular to the direction of displacement V via the respective elastically deflectable locking tongue 8. As a result, both locking hooks 5, 6 can be guided over the respective stop 11 into the respective associated receiving groove 9, 10, as described in more detail below in connection with the joining of the telescopic members 2-4 to form the telescopic guide 1. Furthermore, the locking hooks 5, 6 are able to strike "softly" against the respective stop 11 due to their elastic deflectability on the respective telescopic member 2, 4 and due to the angular arrangement of the locking tongue 8 and locking projection 7, in that part of the kinetic energy of the telescoped drawer is absorbed by the elastic deformation energy of the locking hooks 5, 6.

The first locking hook 5 has a first contact projection 14 and the second locking hook 6 has a second contact projection 15.

When the locking hooks 5, 6 are in the largely undeflected state (Figure 1c), both contact projections 14, 15 have a distance a from the contact surface 13 which is smaller than a depth t with which the respective locking projection 7 projects into the first or second receiving groove 9 or 10 on the stop 11 (Figure 1a). As a result, when the telescopic guide 1 is mounted, the locking hook 5, 6 cannot be guided out of the receiving groove 9, 10 over the stop 11 because the contact projection 14, 15 first strikes the mounting surface of the respective telescopic member 2, 3 and prevents the locking hook 5, 6 from deflecting further in this direction. The distance a can therefore be adjusted via the size of the contact projection 14, 15.

As can be seen in Figures 1b and 1c and in particular in Figure 1d, a detail C according to Figure 1a, the receiving grooves 9, 10 each have a first locking groove 16 in their groove base in front of their stop 11, which runs transversely to the direction of displacement V and into which the locking projection 7 can engage. As indicated by the slightly curved course of the locking tongue 8 in Figure 1b, the locking projection 7 rests under prestress on the groove base of the respective receiving groove 9, 10 when the telescopic guide 1 is assembled. By displacing the locking hook 5 or 6 against the stop 11 of the receiving groove 9 or 10, the locking hook 5, 6 can slide with its locking projection 7 into the locking groove 16. The depth of the locking groove 16 and the section with which the locking projection 7 engages in the locking groove 16 can be used to adjust the strength of the locking. In the embodiment of the invention shown here, the first locking groove 16 itself is kept relatively flat in order to achieve only a slight locking. The necessary play is also set via the distance a, through which the locking projection can engage or disengage in or from the locking groove 16 without being led out of the receiving groove 9, 10 over the stop 11. The free end of the locking projection 7 is adapted to the shape of the locking groove 16 in order to ensure a more effective locking of the

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locking projection 7 with the locking groove 16.

On the side opposite the stop 11, the receiving grooves 9, 10 have a further locking groove 17, the long side of which is open towards the end of the receiving groove 9, 10 up to its groove base and is thus designed like a bevel of the end of the receiving groove 9, 10. As shown in Figure 1c with the telescopic guide 1 in the undeflected state, the locking hook 5, 6 engages with its locking projection 7 in the locking groove 17, i.e. over the beveled end of the receiving groove 9, 10 for locking. This creates two points at both ends of the displacement path W for easy locking of the locking hook 4. Conceivable, but not shown here, are further locking grooves that mark other points of the displacement path W by a locking reception of the locking projection.

As can be seen in particular in Fig. 2a, the two telescopic members 2, 4 each have a stop web 18 at the free ends facing away from the middle or second telescopic member 3, which serves to limit the displacement path W on this side. For this purpose, the second telescopic member 3 strikes the stop web 18 with its front side 19 facing the respective stop web 18. By positioning the stop web 18 at the end of the telescopic members 2, 4 and by the front surface 19 of the telescopic member 3 as a counterpart to the stop web 18, the length of the displacement path W on this side is maximized. The stop web 18 is, as shown in Figure 2a, only formed on one side perpendicular to the displacement direction V and can therefore be elastically deflected in the displacement direction V, acting like a leaf spring. The elastic deflection of the stop web 18 also results in a springy, "soft" braking of the telescopic guide 1 at the end of the displacement path W. Here, the stop web 18 was formed on the side parallel to the direction of the locking projection 7 on the telescopic member 2, 4 in order to thereby create an advantageously long stop web 18 with a correspondingly long

Instead of a stop bar, another type of stop with spring properties, such as a spiral spring, could be used.

In the embodiment presented here, guide elements are designed as a tongue and groove arrangement to guide the telescopic members 2-4 into one another. The telescopic member 3 is provided with a U-profile 20 on each of two opposite side surfaces, with the legs of the U-profiles being designed as pairs of aligned guide springs 21. The two telescopic members 2 and 4 are each provided with two lateral, opposite one another, guide grooves 20 running in the direction of displacement V and pointing inwards, into which the respectively associated aligned and outward-pointing guide springs 21 of the telescopic member 3 can be inserted and moved in the longitudinal direction and thus in the direction of displacement V of the telescopic guide 1.

In the telescopic member 3, the guide elements for stabilizing the tongue and groove connection in the guide springs 21 have stabilizing springs 23 in the form of leaf springs, which are formed by an elongated hole 24 in the direction of displacement V and a spring bar 25 resulting from this. The spring bar 25 runs essentially in the longitudinal direction of the telescopic member 3, bulges perpendicularly to the direction of displacement V over the end section of the guide spring 21 and, when the telescopic guide 1 is assembled, rests against the groove base of the guide groove 22. This minimizes the play between the guide groove 22 and the guide spring 21 and thus prevents rattling or the like. In the example presented here, the stabilizing springs 23 are arranged in one of the U-profiles 20, with each of the two guide springs 21 having two stabilizing springs 23 in a row. This stabilizes both guide springs 21 at two points each.

» ♦

The first telescopic member 2 and the third telescopic member 4 are provided with two first and two second fastening openings 26 and 27, respectively, which are arranged in a section of the associated telescopic member 2, 4 in which the telescopic member 3 does not cover the fastening openings 26, 27 in the deflected state of the telescopic guide 1 shown in Figure 1a and the fastening openings 26, 27 are thus freely accessible. Screws which are guided through the fastening openings 26, 27 and screwed to the drawer are preferably considered as additional fastening means. Instead of this form of fastening, a form is also conceivable in which the end members are mounted on the drawer via spring clips or snap locks.

Figures 3a to c show in three steps how the individual telescopic members 2-4 can be joined together to form the telescopic guide 1. Figure 3a shows the three telescopic members 2-4 not joined together, but already brought into the correct position for joining, with the guide springs 21 and guide grooves 22 assigned to each other shown as already aligned with each other. In a further step, the two telescopic members 2, 4 can now be pushed laterally with their guide grooves 22 over the guide springs 21 of the telescopic member 3 assigned to them in the joining direction X, which in the embodiment shown here is the same as the displacement direction V. For this purpose, the respective locking hook 5, 6 is deflected laterally so that it rests with the locking projection 7 under elastic prestress on the outer surface of the middle member 3 facing the telescopic member 2, 4. This state is shown in Figure 3b. The two end links 2 can then be moved further over the middle link until the locking hook 5, 6 with the locking projection 7 engages in the respective receiving groove 9, 10. Figure 3c shows the state of the telescopic guide 1 in which the locking hooks 5, 6 of the two telescopic links 2, 4 are guided into the respective receiving groove 9, 10 of the telescopic link 3 and at the same time with the

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Locking projection 7 are engaged in the respective locking groove 16. In this state, the telescopic guide 1 can be easily displaced in the direction of displacement V over the displacement path W, the locking hook 5, 6 with the locking projection 5 resting under slight pretension on the groove base of the receiving groove 9, 10 in the areas of the receiving groove 9, 10 without a transverse locking groove 12, so that the locking hook 5, 6 can engage in the locking groove 16 when it reaches the locking groove 16. In the embodiment of the invention shown here, it is necessary that the two telescopic members 2, 4 are mounted in the deflected state of the telescopic guide 1 via the fastening openings 26, 27 with screws or the like (not shown here) on the mounting surface of the drawer or on the mounting surface of the piece of furniture in which the drawer is arranged.

Another fastening mode is conceivable, but not shown here, whereby the contact surfaces of the end links or the mounting surface have spring clips or snap connections by means of which the telescopic guide is attached to the mounting surfaces.

In the embodiment shown here, the locking hooks as first and second locking hooks 5, 6 have different dimensions, with the locking hook 5 of the first telescopic link 2 shown on the left in the figures with its locking tongue 8 further from the contact surface 13 than the locking tongue 8 of the locking hook 6 of the telescopic link shown on the right in the figures. In order to create the distance a from the contact surface 13 desired for the play, the contact projection 14 of the locking hook 5 of the left telescopic link is necessarily larger than the contact projection 15 of the locking hook 6 of the right end link 2. As a result, the first telescopic link 2 can reach further over the telescopic link 3 in the direction of the locking projection 7 and thereby achieve a tilt-proof connection between the two telescopic links 2, 3.

As can be seen in particular in Figure 2a, in this embodiment the two telescopic members 2, 4 have structural elements to increase rigidity while simultaneously saving plastic material, which are formed here in the form of ribs 28 in a honeycomb structure. These can of course also be provided to stiffen the middle member 3. Other reinforcement and stiffening structures according to the state of the art are also conceivable.

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LIPPERT, STACHOW, SCHMIDT & PARTNERS Patent Attorneys - European Patent Attorneys - European Trademark Attorneys

P.O. Box 30 02 08 , D-51412 Bergisch Cladbach Telephone +49 (0) 22 04.92 33-0 Fax +49 (0) 22 04.6 26 06

S-Vi/vi 17 July 2003

Telescopic guide List of reference symbols

1. Telescopic guide ·· ·· ·
· · ·
· ··· · ·
· · · ···
· · · ·
·· ·· · 2. first telescopic link 3. second telescopic link 4. third telescopic link 5. first locking hook &bgr;. second locking hook 7. Locking projection 8th. Locking tongue 9. first slot 10. second slot 11. attack 12. slot 13. Contact surface 14. first investment advantage 15. second investment advantage 16. Locking groove 17. Locking groove 18. Stop bar 19. Front side 20. U-profile 21. Guide spring 22. Guide groove 23. Stabilizing spring ··· ···· ·· ·· ···· ·
··· ···· · ···!
• · ··· · · · · · «
*·· ··· · ·
ff · · ····· · i
·■* ···« ··■■ ·· ·· ··· ·

24. Long hole

25. Spring bar

26. first mounting hole

27. second mounting hole 28. ribs

a Distance t Depth V Direction of displacement W Displacement path X Joining direction

Claims (16)

1. Telescopic guide for drawers or the like with at least a first telescopic member ( 2 ) and a second telescopic member ( 3 ), which are displaceable one inside the other on a displacement path (W) and are mounted so as to be guided by guide elements, and with limiting elements for limiting the displacement path (W), characterized in that the individual telescopic members ( 2 , 3 ) are formed in one piece with the respective guide elements and the respective limiting elements and consist of plastic. 2. Telescopic guide according to claim 1, characterized in that the limiting elements on the first telescopic member ( 2 ) have a first latching hook ( 5 ) with a latching projection ( 7 ) and on the second telescopic member ( 3 ) have a first receiving groove ( 9 ) running in the direction of displacement (V) for receiving the latching projection ( 7 ) in the assembled state of the telescopic guide ( 1 ), wherein the first receiving groove ( 9 ) is provided with at least one transverse limit as a stop ( 11 ) for the first latching hook ( 5 ) and wherein the first latching hook ( 5 ) is formed on the first telescopic member ( 2 ) so as to be elastically deflectable perpendicular to the first receiving groove ( 9 ) such that when the two telescopic members ( 2 , 3 ) are joined together, it can be guided under elastic prestress with the latching projection ( 5 ) over the stop ( 11 ) into the first receiving groove ( 9 ). 3. Telescopic guide according to claim 2, characterized in that the first locking hook ( 5 ) is arranged laterally in an opening in the first telescopic member ( 2 ) which runs perpendicular to the direction of displacement (V). 4. Telescopic guide according to claim 2 or 3, characterized in that the locking projection ( 7 ) is formed on the first telescopic member ( 2 ) via a locking tongue ( 8 ) and that the locking projection ( 7 ) can be guided on and/or via the locking tongue ( 8 ) in the direction of displacement (V) so as to be elastically deflectable against the stop ( 11 ). 5. Telescopic guide according to claim 3 or 4, characterized in that the opening is guided through a contact surface ( 13 ) of the first telescopic member ( 2 ), with which the first telescopic member ( 2 ) rests against a mounting surface of the drawer after installation, and that the first locking hook ( 5 ) with its side facing the contact surface ( 13 ) is spaced at a distance (a) from the contact surface ( 13 ) at most such that the distance (a) is smaller than a depth (t) with which the locking projection ( 7 ) projects over the stop ( 11 ) into the first receiving groove ( 9 ). 6. Telescopic guide according to claim 5, characterized in that the first locking hook ( 5 ) is provided on its side opposite the locking projection ( 7 ) with a first abutment projection ( 14 ) which forms the limitation of the distance (a) to the first locking hook ( 5 ). 7. Telescopic guide according to one of claims 3 to 6, characterized in that the opening is designed in the form of a slot ( 12 ) on the front side of the first telescopic member ( 2 ). 8. Telescopic guide according to one of claims 1 to 7, characterized in that the limiting elements on the first telescopic member ( 2 ) have a stop web ( 18 ) arranged transversely to the direction of displacement (V) and elastically deflectable in the direction of displacement (V), against which the second telescopic member ( 3 ) can be guided with a stop surface in the assembled state of the telescopic guide ( 1 ). 9. Telescopic guide according to claim 6, characterized in that the stop surface is formed by at least a portion of the end face ( 19 ) of the second telescopic member ( 3 ). 10. Telescopic guide according to one of claims 2 to 9, characterized in that the first receiving groove ( 9 ) has at least one locking groove ( 16 , 17 ) running transversely to its longitudinal direction in its groove base and that the locking projection ( 7 ) in the assembled state of the telescopic guide ( 1 ) rests against the groove base of the first receiving groove ( 9 ) under prestress such that the locking projection ( 7 ) can be releasably locked into the locking groove ( 16 , 17 ). 11. Telescopic guide according to one of claims 1 to 10, characterized in that the guide elements of the telescopic members ( 2-4 ) have a tongue and groove connection, wherein the first telescopic member ( 2 ) has two first lateral guide grooves ( 22 ) which are opposite one another and run in the direction of displacement (V), and the second telescopic member ( 3 ) has two guide springs ( 21 ) which are aligned with one another, point in opposite directions and are adapted to the guide grooves ( 22 ) and which can be inserted into the guide grooves ( 22 ) in the direction of displacement (V). 12. Telescopic guide according to one of claims 1 to 9, characterized in that the guide elements of the telescopic members have at least one stabilizing spring ( 23 ) for stabilizing the position of one of the two guide springs ( 17 ) in the associated guide groove ( 18 ). 13. Telescopic guide according to claim 10, characterized in that the stabilizing spring ( 23 ) is designed as a leaf spring with a spring web ( 25 ) formed by an opening ( 24 ) in the guide spring and running in the direction of displacement (V), which runs essentially in the longitudinal direction, bulges perpendicular to the direction of displacement (V) over the end section of the guide spring ( 21 ) and rests against the groove base of the guide groove ( 22 ) in the assembled state of the telescopic guide ( 1 ). 14. Telescopic guide according to one of claims 1 to 11, characterized by a third telescopic member ( 4 ), wherein the second telescopic member ( 3 ) forms the middle member ( 3 ) and the first ( 2 ) and the third telescopic member ( 4 ) form the end members of the telescopic guide ( 1 ), and wherein the limiting elements on the third telescopic member ( 4 ) have a second latching hook ( 6 ) and on the second telescopic member ( 3 ) have a first ( 9 ) and a second receiving groove ( 10 ) for receiving the latching projection ( 7 ) of the first latching hook ( 5 ) of the first telescopic member ( 2 ) and the second latching hook ( 6 ) of the third telescopic member ( 4 ) in the assembled state of the telescopic guide ( 1 ). 15. Telescopic guide according to claim 12, characterized in that the first ( 9 ) and the second receiving groove ( 10 ) are arranged on opposite longitudinal sides of the second telescopic member ( 3 ) and are at least partially offset over the length of the second telescopic member ( 3 ). 16. Telescopic guide according to claim 12 or 13, characterized in that the second telescopic member ( 3 ) is provided with a U-profile ( 20 ) on two opposite side surfaces, wherein the legs of the U-profiles ( 20 ) are designed as pairwise aligned guide springs ( 21 ), and that the first ( 2 ) and the third telescopic member ( 4 ) are each provided with two guide grooves ( 22 ) into which the respectively associated, aligned guide springs ( 21 ) of the second telescopic member ( 3 ) can be inserted in the direction of displacement (V).