ES2989636T3 - Telescopic box - Google Patents

Abstract

The invention relates to a push box consisting of a foldable flat material and comprising: - an inner part having a bottom wall and four first side walls, - an outer part having a top wall and four second side walls, - first locking tabs, which bear against the outer sides of two opposite first side walls, are connected to the inner part via fold lines and form first locking edges beneath the top wall with their lower edges, - second locking tabs, which bear against the inner sides of two opposite second side walls, are connected to the outer part via fold lines and form second locking edges beneath the top wall with their upper edges, - the first locking tabs comprising two layers of the foldable flat material at least at the first locking edges, and/or the second locking tabs comprising two layers of the foldable flat material at least at the second locking edges, - first coupling holes, which are arranged above the second locking edges, and second coupling holes, which are arranged at the bottom edge and They are open at the bottom on the second two side walls. (Automatic translation with Google Translate, no legal value)

Description

DESCRIPTION

Telescopic box

The invention relates to a telescopic box comprising an inner part with a bottom wall and four first side walls and an outer part with a cover wall and four second side walls, in which the outer part can be telescopically positioned over the inner part. The inner part has a first opening opposite the bottom wall and delimited by the edges of the first side walls, for inserting and removing products. The outer part has a second opening opposite the cover wall and delimited by edges of the second side walls, for inserting and removing the inner part. The outer part and the inner part are made of cardboard, corrugated cardboard or other foldable flat material.

Telescopic boxes are used for a wide variety of products, in particular for dishwasher tablets, medicines, household detergents, candles, cosmetics, tobacco and other products that should not reach children, as they are often put in their mouths, swallowed or used in other dangerous ways. This applies in particular to toddlers, nursery children and pre-school children, i.e. children up to the age of six. Typically, the folding box manufacturer produces printed blanks with folding lines, which are delivered flat in the form of stacks to the packer of the products to be packed, where the inner and outer parts are lifted and glued. In particular, during the production of the blanks and the lifting and gluing of the inner and outer parts, tolerances may occur which must not be so large that the outer part cannot be placed telescopically on the inner part.

Documents US2019/062023A1, WO03/101840A1 and EP3778412 disclose telescopic boxes, in which the interlocking flaps are made of a single layer.

Based on this, the invention aims to provide a telescopic box which is reliably protected against opening by children or other unintentional openings. This must also be ensured by taking into account the tolerances in the production of the cut-outs, the lifting and gluing of the telescopic box.

The objective is achieved by a telescopic box according to claim 1. Advantageous embodiments of the telescopic box are indicated in the dependent claims.

The telescopic box according to the invention made of cardboard, corrugated cardboard and/or other foldable flat material comprises

- an inner part with a back wall and four first side walls,

- an outer part with a cover wall and four second side walls,

- first interlocking flaps which are in contact with the outer sides of two opposite first side walls and which are connected to the inner part via folding lines and which with their lower edges form first interlocking edges below the cover wall,

- second interlocking flaps which are in contact with the inner sides of two opposite second side walls and which are connected to the outer part via folding lines and which form second interlocking edges below the cover wall,

- the first interlocking flaps comprising, at least at the first interlocking edges, two layers of the foldable flat material of which the inner part is formed, and/or the second interlocking flaps comprising, at least at the second interlocking edges, two layers of the foldable flat material of which the outer part is formed,

- first gripping holes arranged in the two first side walls above the second locking edges and second gripping holes arranged in the lower edge and open downwards, - whereby, when the outer part is telescopically positioned on the inner part, the second locking edges are arranged below the first locking edges, the first and second locking edges prevent separation of the outer part and the inner part by contacting each other, and by inserting the thumb and index finger of one hand into the first gripping openings and partially pressing the first locking flaps towards each other, the outer part can be gripped and contact of the first and second locking edges with each other prevented, and by inserting the thumb and index finger of the other hand into the second gripping openings, the inner part can be gripped and the outer part and the inner part can be separated.

In the telescopic box according to the invention, the first locking flaps and the second locking flaps form a locking mechanism when the outer part is telescopically positioned on the inner part. In this case, the second locking edges are arranged below the first locking edges, so that they prevent the outer part from being removed from the inner part when they are in contact with each other or abutting one another. In order to remove the outer part from the inner part, it is necessary to release the lock between the outer part and the inner part. To do this, the user can insert the thumb and index finger of one hand into the gripping openings and lightly press the first locking flaps towards each other so that the first locking edges no longer block the path of the second locking edges. With the thumb and index finger of the other hand, the user can grasp the lower edge of the inner part through the second gripping openings and separate the outer part from the inner part. In doing so, the first locking flaps slide past the tips of the user's thumb and index finger, which grasp the first gripping openings and lightly press the first locking flaps towards each other. Due to the fact that the first locking flaps consist of two layers of the foldable flat material of the inner part, at least at the first locking edges, and/or that the second locking flaps consist of two layers of the foldable flat material of the outer part, at least at the second locking edges, tolerances that may occur during the production of cut-outs and the lifting and gluing of the inner part and/or the outer part are compensated. This ensures that the telescopic box can be securely locked despite the tolerances. Unlocking by a child can be prevented by sizing the telescopic box such that the child cannot reach the described gripping openings due to the comparatively small size of his hands. Furthermore, unlocking requires a certain understanding of the function of the lock, which is usually not yet available in a child up to six years of age. A child is thus prevented from unlocking the telescopic box according to the invention and is protected from the associated dangers. Furthermore, the telescopic box according to the invention is protected against unintentional opening which can occur with a conventional telescopic box, for example if it is lifted by the outside without supporting the inner part, so that the inner part comes out from the outer part.

In the present applications, positional indications such as "below" and "above", "lower" and "upper", as well as "below" and "above" refer to an arrangement of the telescopic box in which the outer part is telescopically positioned over the inner part, the cover wall is oriented horizontally and the second side walls are oriented vertically downwards from the cover wall.

It is understood that the inner part has a first opening for insertion and extraction of the product, which is opposite the bottom wall and delimited by the edges of the first side walls. In addition, the outer part has a second opening for insertion and extraction of the inner part, which is opposite the cover wall and delimited by the edges of the second side walls.

According to one embodiment of the invention, the first interlocking flaps are connected to the first side walls via first folding lines at their upper edges. In this way, the inner part, including the first interlocking flaps, can be formed from a single-piece blank. Via the first folding lines, the first interlocking flaps are fixedly connected to the inner part.

In another embodiment, the first locking flaps comprise first inner locking flaps which are in contact with the outer sides of the first side walls and first outer locking flaps which are connected to the first inner locking flaps via second folding lines at the lower edges of the first inner locking flaps and which are in contact with the outer sides thereof, the lower edges of the first inner and outer locking flaps together forming the first locking edges. The first inner locking flaps and the first outer locking flaps form common double-layer first locking flaps, the double layer being provided in particular at the first locking edges. The first double-layer locking flaps compensate for any tolerances which may occur during the production of the cut-outs and when lifting and gluing the inner and outer parts, so that the telescopic box can be securely locked despite the tolerances.

In another embodiment, the first inner interlocking flaps are connected to the edges of the first side walls via the first folding lines. In this case, the first inner interlocking flaps are connected directly to the first side walls and the first outer interlocking flaps are connected indirectly to the first side walls.

In another embodiment, the first inner interlocking flaps are connected to the edges of the first side walls via the first folding lines. In this way, it can be achieved that the outside of the cardboard forming the first side walls is also the outer side of the first outer interlocking flaps. In this way, a uniform appearance of the inner part is achieved.

In another embodiment, the first folding lines are perforation lines and/or the second folding lines are scoring lines. In this way, the effort required to fold the first inner locking flaps and the first outer locking flaps in different directions is reduced, since the perforation lines and the scoring lines are incorporated into the cardboard material with relatively little effort. The second folding lines are preferably designed as scoring lines, since these form a particularly straight edge and the second folding line simultaneously defines the first locking edge.

In another embodiment, the first locking flaps are connected to the outer sides of the first side walls by means of adhesive, the first inner connecting flaps preferably being connected to the outer sides of the first side walls by means of adhesive and the first outer glue flaps preferably being connected to the outer sides of the first inner glue flaps by means of adhesive. In a preferred embodiment, these gluing operations are already carried out by the folding box manufacturer. In another embodiment, the adhesive is applied in the form of parallel glue lines or adhesive strips. In another embodiment, the glue lines or adhesive strips run parallel to the first folding lines.

In another embodiment, the first side walls have bevels on both sides adjacent to each first locking flap. This facilitates telescopic positioning of the outer part on the inner part. In a preferred embodiment, the bevels form an angle of 45° with the adjacent edge of the first side wall.

In another embodiment, the second locking flaps are connected to the lower edges of the second side walls of the outer part via third folding lines. In this way, the outer part with the second locking flaps can be formed from a single blank. Via the third folding lines, the second locking flaps are firmly connected to the outer part.

In another embodiment, the second locking flaps have second inner locking flaps which are in contact with the inner sides of the second side walls and second outer locking flaps which are connected to the second inner locking flaps via fourth folding lines at the upper edges thereof and which are in contact with the outer sides thereof. The second inner locking flaps and the second outer locking flaps form two-layer second locking flaps. In this way, tolerances can be guaranteed when producing the cut-outs, lifting and gluing the outer and inner parts, and a secure locking of the telescopic box can be ensured.

In another embodiment, the second outer locking flaps are connected to the lower edges of the second side walls via the third folding lines. In this way, the second outer locking flaps are connected directly to the second side walls and the second inner locking flaps are connected indirectly to the second side walls via the second outer locking flaps. The arrangement of the second outer locking flaps facilitates the telescopic positioning of the outer part on the inner part and its secure locking, since the outer locking flaps form smooth inner surfaces of the outer part.

In another embodiment, the second outer locking flaps are designed such that they completely cover the second inner locking flap. For this purpose, the second outer locking flaps are of the same size or larger than the second inner locking flaps.

In another embodiment, the third folding lines are scoring lines and/or the fourth folding lines are scoring lines. Particularly straight edges are formed by the scoring lines. This is particularly advantageous for the second locking edges. Since the inner and outer locking flaps are folded in the same directions, scoring lines on the same side can be incorporated into the cardboard material. This is possible with relatively little effort.

In another embodiment, the second locking flaps are connected to the inner sides of the second side walls by means of adhesive, the inner second locking flaps preferably being connected to the inner sides of the second side walls by means of adhesive and the outer second locking flaps preferably being connected to the inner second locking flaps by means of adhesive. In another embodiment, the adhesive is configured in the form of parallel adhesive lines or in the form of parallel adhesive strips. In another embodiment, the adhesive lines or adhesive strips run parallel to the third folding lines.

In another embodiment, the first gripping holes are round, oval or rectangular and/or the second gripping holes are in the shape of the upper half of a circle, oval or rectangle.

In another embodiment, the first side walls and the second side walls are connected to adjacent side walls respectively via folding lines running perpendicular to the grain direction. This is advantageous for a particularly straight configuration of the edges on said folding lines.

In another embodiment, the shortest distance between the first finger holes and/or the second finger holes along the outer sides of the top and/or bottom is dimensioned such that a child of an age of up to 3 years, preferably up to 4 years, preferably up to 5 years, preferably up to 6 years, cannot unlatch the telescopic box with both hands and remove the outer part from the inner part. The dimensioning is based on the average body measurements of a child in the EU, regardless of gender, in the respective age group.

In another embodiment, the distance between the outer sides of the second side walls is 50 to 120 mm, preferably 70 to 100 mm, preferably 80 to 90 mm. This ensures that a child cannot reach into all the gripping holes at the same time to unlock the folding box. However, this is possible without problems for an adult.

In another embodiment, the second side walls project downwards from the underside of the cover wall at least as much as the first side walls project upwards from the underside of the bottom wall of the inner part. In this way, it is achieved that the dynamic pressure in a stack of telescopic boxes according to the invention is transmitted via the outer part. This is particularly advantageous for the stability of the telescopic boxes. In another embodiment, the second side walls project downwards from the underside of the cover wall to the same extent as the first side wall parts project upwards from the underside of the bottom wall of the inner part. In this way, it is achieved that the dynamic pressure in a stack is transmitted downwards via both the outer part and the inner part, which is particularly advantageous for the stability of the telescopic boxes.

In another embodiment, the inner part is made from a single blank and/or the outer part is made from a single blank. This makes the production of the folding box easier. In a preferred embodiment, the blanks with pre-glued interlocking flaps are stacked flat on top of each other and supplied by the folding box manufacturer to the packer. The latter lifts the telescopic boxes and performs any necessary additional gluing and packs the products into the telescopic boxes.

In another embodiment, the inner part is made of cardboard or corrugated cardboard and/or the outer part is made of cardboard or corrugated cardboard.

The invention will be explained in more detail below with the aid of the accompanying drawings of an exemplary embodiment. The drawings show:

Figure 1 shows a cut-out of an inner part in a flat position in a top plan view of the inner side; Figure 2 shows the same cut-out in a flat position, after a first folding and gluing step, in a top plan view;

Figure 3 shows the inner part formed from the same cut-out in a perspective view obliquely from above and from the side;

Figure 4 is a flat, flatly extended cut-out of the outer part in a perspective view, obliquely from above and from the side, of the inner side;

Figure 5 the partially folded and glued cutout in the same perspective view;

Figure 6 shows the fully raised and glued outer part, in an oblique perspective view from above and from the side;

Figure 7 The outer part and the inner part before telescopic placement of the outer part on the inner part in a perspective X-ray image;

Figure 8: The outer part placed telescopically over the inner part, in a perspective X-ray image;

Figure 9: The outer part placed telescopically on the inner part, in longitudinal section

According to Figure 1, a first cut-out 1 for the inner part has a bottom wall 2 which is connected at its side edges to four first side walls 3, 4, 5, 6 by means of folding lines. The bottom wall 2 and the first side walls 3, 4, 5, 6 are respectively rectangular.

The first side wall 3 is connected on two opposite sides via first folding lines 7, 8 to first locking flaps 9, 10. The first locking flaps 9, 10 comprise first inner locking flaps 9.1, 10.1 which are connected directly to the first side wall 3 via the first folding lines 7, 8. Furthermore, the first locking flaps 9, 10 comprise first outer locking flaps 9.2, 10.2 which are connected directly to the outer edges of the first inner locking flaps 9.1, 10.1 via second folding lines 11, 12.

The first side wall 5 is connected on both sides via parallel folding lines to dust flaps 13, 14. On the side of the first side wall 5 opposite the side connected to the bottom wall 2, the side wall 5 is connected via a further folding line to a cover flap 15, which is connected on both outer sides to glue flaps 16, 17. On the edge opposite the edge connected to the side wall 5, the cover flap 15 is connected via a folding line to a further cover flap 18, which in turn is connected via a further folding line to a bottom flap 19 on the opposite edge.

According to Figure 2, in a first step, the first outer interlocking flaps 9.2, 10.2 are folded against the outer sides of the first inner interlocking flaps 9.1, 10.1 and glued to them. The cover flaps 15, 18 are then folded around the fold line between the cover flap 15 and the side wall 5 against the side wall 5 and the bottom wall 2, and the bottom flap 19 is glued to the bottom wall 2. These steps can also be carried out by the packaging manufacturer. A multiplicity of pre-glued flat first blanks 1 can be transported in stacks to the packer.

There, the inner part is raised by folding all of the first side walls 3, 4, 5, 6 vertically upwards with respect to the bottom wall 2, folding the dust flaps 13, 14 against the inner sides of the side walls 4, 6 and gluing them thereto, folding the gluing flaps 16, 17 against the inner sides of the dust flaps 13, 14 and gluing them thereto, and folding the first inner locking flaps 9. 1, 10. 1 against the outer sides of the side walls 3, 5 and gluing them thereto. The inner part 20 raised and glued in this way is shown in Fig. 3. Between the side walls 3, 4, 6 and the cover flap 15, the inner part 20 has a first opening 20. 1 opposite the bottom wall 2.

According to Figure 4, a second cut-out 21 for an outer part comprises a cover wall 22 which is connected to the second side walls 23, 24, 25, 26 via folding lines at the four side edges. The cover wall 22 and the second side walls 23, 24, 25, 26 are respectively rectangular, the cover wall 22 being substantially square and the second side walls 23, 24, 25, 26 forming elongated rectangles.

The second side walls 23, 24, 25, 26 are connected, respectively, by parallel side edges, via folding lines, to second dust flaps 27, 28, 29, 30. Furthermore, the second side walls 23, 25 are connected, by the edges opposite the edges connected to the cover wall 22, to second locking flaps 33, 34 via third folding lines 31, 32. The second locking flaps 33, 34 comprise second outer locking flaps 33.1, 34.1 which are directly connected to the second side walls 23, 25 via third folding lines 31, 32. Furthermore, they comprise second inner locking flaps 33.2, 34.2 which are connected via fourth folding lines 31, 32. 35, 36 to the edges of the second outer interlocking flaps 33.1, 34.1 which are opposite the edges with the third folding lines 31, 32.

The second outer interlocking flaps 33.1, 34.1 each have two sections, a first section which is adjacent to the third folding lines 31, 32 being rectangular. A second section which is adjacent to the fourth folding lines 35, 36, has a trapezoidal shape widening towards the first section. The second inner interlocking flaps 33.2, 34.2 are also trapezoidal in shape, the lateral boundaries extending in continuation of the boundaries of the second trapezoidal part of the second outer interlocking flaps 33.1, 34.1. Furthermore, the second inner interlocking flaps 33.2, 34.2 are lower in height than the second outer interlocking flaps 33.1, 34.1. In the example, they are only about a quarter of the height.

In the second side walls 23, 25, first oval or circular gripping openings 37, 38 are present, which are arranged in each case closer to the cover wall 22 than to the second locking flap 33, 34. Furthermore, second oval or circular gripping openings 39, 40 are arranged with one half in the second side wall 23, 25 and with the other half in the second outer locking flap 33.1, 34.1.

According to Figure 5, in a first step, preferably by the packaging manufacturer, the second inner locking flaps 33.2, 34.2 are folded against the inner sides of the second outer locking flaps 33.1, 34.1 and glued thereto, the second outer locking flaps 3131, 34.1 are folded against the inner sides of the second side walls 23, 25 and the second inner locking flaps 33.2, 34.2 are glued to the inner sides of the second side walls 23, 25. Fourth folding lines 35, 36 are then arranged between the first gripping openings 37, 38 and the third folding lines 31, 32.

The second cuttings 21 in a flat position are supplied to the packer in stacks, one on top of the other.

There, the side walls 23, 24, 25, 26 are raised and the second dust flaps 27, 28, 29, 30 are glued to the inner sides of the side walls 26, 27. The outer part 41 raised and glued in this way is shown in Figure 6.

The second outer locking flap 33.1, 34.1 completely covers the second inner locking flap 33.2, 34.2, so that the outer part 41 is smooth on the inside adjacent to its second opening 42. Due to the folding of the second locking flaps 33, 34 against the inner sides of the side walls 23, 25, second downwardly open gripping openings 39.1, 40.1 are formed at the lower edges of the outer part 41, the contour of which corresponds to half of the contour of the cut-out 21.

Figure 7 shows the inner part 20 and the outer part 41 just before the telescopic placement of the outer part 41 on the inner part 20.

The first inner and outer interlocking flaps 9.1, 9.2, 10.1, 10.2 overlapping each other form first interlocking edges 42, 43 on the second folding lines 11, 12.

The second inner and outer interlocking flaps 33.1, 33.2, 34.1, 34.2 superimposed on each other form second interlocking edges 44, 45 on the fourth folding lines.

When the outer part 41 is telescopically attached to the inner part 20, the second locking edges 44, 45 move in front of the first locking edges 42, 43 and are arranged below them. The telescopic box 46 is shown in Figures 8 and 9.

When attempting to separate the outer part 41 from the inner part 20, the second locking edges 44, 45 collide with the first locking edges 42, 43, thereby preventing them from being separated. The user can override this locking by inserting the thumb and index finger of one hand into the first gripping openings 37, 38 and pressing the first locking flaps 9, 10 slightly inwards. The second locking edges 44, 45 are then no longer blocked by the first locking edges 42, 43. At the same time, the user can insert the thumb and index finger of the other hand into the second gripping openings 39.1, 40.1, grasp the inner part 20 at the lower edge and pull the outer part 41 and the inner part 20 apart with both hands. This is not possible for a child. The covering flaps 15, 18 of the inner part 20 prevent a child from inserting his hand into the telescopic box from below.

After removing the product, the user can close the telescopic box 46 again and, if necessary, open it in the manner described to remove another product.

Claims (19)

1. Telescopic box made of cardboard, corrugated cardboard or other foldable flat material, comprising - an inner part with a back wall and four first side walls, - an outer part with a cover wall and four second side walls, - first interlocking flaps which are in contact with the outer sides of two opposite first side walls and which are connected to the inner part via folding lines and which with their lower edges form first interlocking edges below the cover wall, - second interlocking flaps which are in contact with the inner sides of two opposite second side walls and which are connected to the outer part via folding lines and which form second interlocking edges below the cover wall, - the first interlocking flaps comprising, at least at the first interlocking edges, two layers of the foldable flat material of which the inner part is formed, and/or the second interlocking flaps comprising, at least at the second interlocking edges, two layers of the foldable flat material of which the outer part is formed, - first gripping holes arranged in the two first side walls above the second locking edges and second gripping holes arranged in the lower edge and open downwards, - whereby, when the outer part is telescopically positioned on the inner part, the second locking edges are arranged below the first locking edges, the first and second locking edges prevent separation of the outer part and the inner part by contacting each other, and by inserting the thumb and index finger of one hand into the first gripping openings and partially pressing the first locking flaps towards each other, the outer part can be gripped and contact of the first and second locking edges with each other prevented, and by inserting the thumb and index finger of the other hand into the second gripping openings, the inner part can be gripped and the outer part and the inner part can be separated. 2. Telescopic box according to claim 1, wherein the first interlocking flaps are attached to the first side walls through first folding lines at their upper edges. 3. Telescopic box according to claim 1 or 2, wherein the first locking flaps have first inner locking flaps which abut the outer sides of the first side walls and first outer locking flaps which are connected to the first inner locking flaps via second folding lines at the lower edges of the first inner locking flaps and which abut the outer sides thereof, the lower edges of the first inner and outer locking flaps together forming the first locking edges. 4. The telescopic box of claim 3, wherein the first inner interlocking flaps are attached to edges of the first side walls via the first fold lines. 5. Telescopic box according to one of claims 2 to 4, wherein the first folding lines are perforation lines and/or the second folding lines are scoring lines. 6. Telescopic box according to one of claims 1 to 5, wherein the first locking flaps are connected to the outer sides of the first side walls by means of adhesive, the first inner connecting flaps preferably being connected to the outer sides of the first side walls by means of adhesive and the first outer gluing flaps preferably being connected to the outer sides of the first inner gluing flaps by means of adhesive. 7. Telescopic box according to one of claims 1 to 6, wherein the first side walls have bevels on both sides next to each first locking flap. 8. Telescopic box according to one of claims 1 to 7, wherein the second locking flaps are connected to the lower edges of the second side walls of the outer part via third folding lines. 9. Telescopic box according to one of claims 1 to 8, wherein the second locking flaps have second inner locking flaps which abut the inner sides of the second side walls and second outer locking flaps which are connected to the second inner locking flaps via fourth folding lines at the upper edges thereof and which abut the outer sides thereof, the upper edges of the second inner locking flaps and the second outer locking flaps together forming the second locking edges. 10. The telescopic box of claim 9, wherein the second outer nervation flaps are attached to the lower edges of the second side walls via the third fold lines, and to the second inner interlocking flaps via the fourth fold lines. 11. Telescopic box according to claims 8 to 10, wherein the third fold lines are scoring lines and/or the fourth fold lines are scoring lines. 12. Telescopic box according to one of claims 1 to 11, wherein the second locking flaps are connected to the inner sides of the second side walls by means of adhesive, the inner second locking flaps preferably being connected to the outer sides of the second side walls by means of adhesive and the outer second locking flaps being connected to the inner second locking flaps by means of adhesive. 13. Telescopic box according to one of claims 1 to 12, wherein the first finger grip openings are round, oval or rectangular or the second finger grip openings have the shape of the upper half of a circle, oval or rectangle. 14. Telescopic box according to one of claims 1 to 13, wherein the first side walls and the second side walls are connected to adjacent side walls respectively via folding lines running perpendicular to the grain direction. 15. Telescopic box according to one of claims 1 to 14, wherein the shortest distance between the first finger openings and/or the second finger openings along the outer sides of the outer part and/or the inner part is dimensioned such that a child of an age of up to 3 years, preferably up to 4 years, preferably up to 5 years, preferably up to 6 years, cannot unlatch the telescopic box with both hands and remove the outer part from the inner part. 16. Telescopic box according to one of claims 1 to 15, wherein the distance between the first finger openings and/or between the second finger openings is 50 to 120 mm, preferably 70 to 100 mm, preferably 80 to 90 mm. 17. Telescopic box according to one of claims 1 to 16, wherein the second side walls protrude downwards from the bottom side of the cover wall at least as much as the first side walls protrude upwards from the bottom wall of the inner part. 18. Telescopic box according to one of claims 1 to 17, wherein the inner part is made of a single-piece cut-out and/or wherein the outer part is made of a single-piece cut-out. 19. Telescopic box according to one of claims 1 to 18, wherein the inner part is made of cardboard or corrugated cardboard and/or the outer part is made of cardboard or corrugated cardboard.