RETAINING BODY, RETAINING DEVICE AND METHOD FOR INSTALLING A RETAINING DEVICE

Abstract

The invention relates to a retaining body for fastening on a surface, wherein the retaining body can be fixed on the surface by means of a double-sided adhesive strip with two opposite retaining surfaces, wherein the retaining body has a basic body with a flat rear surface and a front surface, which is located opposite the rear surface, wherein the front surface of the basic body has formed on it a carrying element which projects from a plane of the basic body, wherein the basic body has, on the front surface, a reinforcing structure with reinforcing elements, wherein the reinforcing elements subdivide the front surface of the basic body into at least two differently sized pressure-exerting surfaces.

Claims

1. A retaining body for fastening on a surface, wherein the retaining body is fixable on the surface by means of a double-sided adhesive strip with two oppositely situated adhesive surfaces, wherein the retaining body comprises a basic body with a flat rear surface and a front surface which is located opposite the rear surface, wherein a carrier element, which protrudes from a plane of the basic body, is realized on the front surface of the basic body, wherein the basic body comprises a reinforcing structure with reinforcing elements on the front surface, wherein the reinforcing elements are formed in one piece with and on the retaining body and divide the front surface of the basic body into at least two differently sized pressing surfaces, wherein, proceeding from a point of applied force, there is optionally provided at least one pressing surface which is arranged in the opposite direction to the main load direction and there is optionally provided at least one pressing surface which is arranged in the main load direction and which is greater than the pressing surface which is arranged in the opposite direction.

2. The retaining body as claimed in claim 1, wherein the reinforcing ribs divide the front surface into at least three pressing surfaces.

3. The retaining body as claimed in claim 1, wherein a first reinforcing element extends from the point of applied force of the carrier element counter to the main load direction.

4. The retaining body as claimed in claim 1, wherein a second reinforcing element and a third reinforcing element extend symmetrically to a symmetry plane through the retaining body, optionally in a mirror-symmetrical manner to a longitudinal axis parallel to the main load direction and through the carrier element.

5. The retaining body as claimed in claim 1, wherein in the view of the front surface of the retaining body, the surface areas of the reinforcing elements are smaller than the surface areas of the pressing surfaces.

6. The retaining body as claimed in claim 1, wherein a normal projection of the carrier element onto the rear surface of the retaining body lies outside the corresponding normal projections of the pressing surfaces.

7. The retaining body as claimed in claim 1, wherein the basic body is scarfed on one side.

8. The retaining body as claimed in claim 1, wherein the retaining body is produced from a fiber-reinforced plastics material.

9. The retaining body as claimed in claim 1, wherein the retaining body is produced on the basis of one of the following materials: polystyrene (PS), optionally a syndiotactic polystyrene (PS-S), styrene acrylonitrile (SAN), acrylonitrile-styrene-acrylate (ASA), acrylonitrile-butadiene-styrene (ABS) and polyamide (PA).

10. The retaining body as claimed in claim 1, wherein the retaining body is produced on the basis of a polyether ether ketone (PEEK), wherein the retaining body is produced, optionally, by hot pressing.

11. The retaining body as claimed in claim 1, wherein reinforcing elements converge in a base which is arranged in the point of applied force, wherein the carrier element rises out the basic body from said base and the reinforcing elements preferably extend out of the base in a star-shaped or compartment-shaped manner.

12. The retaining body as claimed in claim 1, wherein the carrier element is realized in the form of a sloping elliptical truncated cone or in the form of a rose thorn with a tapering end.

13. The retaining body as claimed in claim 1, wherein the carrier element carries a support plate on its free end.

14. The retaining body as claimed in claim 1, wherein one smaller pressing surface comprises a surface area of between 0.6 cm.sup.2 and 2.3 cm.sup.2 and/or two smaller pressing surfaces of the at least three pressing surfaces each comprise a surface area of between 0.6 cm.sup.2 and 2.3 cm.sup.2 and/or one larger pressing surface comprises a surface area of at least 2.5 cm.sup.2.

15. The retaining body as claimed in claim 1, wherein the retaining body is delimited by side edges, wherein positioning notches are realized on the side edges in each case at the same height, optionally at the height of the carrier element.

16. The retaining body as claimed in claim 1, wherein a vent duct which is realized with a V-shaped profile, is provided on the rear surface of the retaining body.

17. The retaining body as claimed in claim 16, wherein the vent duct runs at least in portions under one of the reinforcing elements under the first reinforcing element.

18. A retaining device with a retaining body as claimed in claim 1 and with an adhesive strip which is effective on two sides and is attached on the rear surface of the basic body of the retaining body or on said rear surface.

19. The retaining device as claimed in claim 18, wherein the adhesive strip, which is effective on two sides, comprises a non-adhesive part portion, wherein the non-adhesive part portion projects beyond at least one side of the rear surface of the basic body.

20. A method for installing a retaining device having a retaining body as claimed in claim 1 as well as an adhesive strip, which is effective on two sides and has two oppositely situated sticky adhesive surfaces which are each covered by a protective foil, said method comprising the following steps: a) moving the first protective foil from the first sticky adhesive surface of the adhesive strip which is effective on two sides; b) applying the first sticky adhesive surface of the adhesive strip onto a surface; c) removing the second protective foil from the second sticky adhesive surface of the adhesive strip; d) placing the rear surface of the retaining body onto the second sticky adhesive surface of the adhesive strip; e) exerting pressure onto each of the pressing surfaces of the retaining body, wherein the surface moistened by one of the sticky adhesive surfaces of the adhesive strip increases with each exertion of pressure onto a pressing surface.

Description

[0048] The invention is explained below by way of preferred embodiments with reference to the accompanying figures, in which:

[0049] FIG. 1 shows a perspective view of a retaining device according to the invention with an adhesive strip which is effective on two sides and a retaining body according to the invention;

[0050] FIG. 2 shows a front view of a retaining body according to the invention;

[0051] FIG. 3 shows a side view of the retaining body according to the invention;

[0052] FIG. 4 shows a rear view of a retaining body according to the invention;

[0053] FIG. 5 shows a front view of a retaining body according to the invention identifying a section plane A-A;

[0054] FIG. 6 shows a section A-A through a retaining body according to the invention;

[0055] FIG. 7 shows a further exemplary embodiment of a retaining body according to the invention;

[0056] FIG. 8 shows an application example for detaching a retaining body according to the invention;

[0057] FIG. 9 shows further exemplary embodiments of retaining bodies according to the invention;

[0058] FIG. 10 shows an application example for bonding a retaining device according to the invention with a retaining body according to the invention;

[0059] FIG. 11 shows a perspective view of a retaining device according to the invention with a retaining body according to the invention and an adhesive strip pulled undone;

[0060] FIG. 12 shows a further exemplary embodiment of a retaining body according to the invention; and

[0061] FIG. 13 shows a further exemplary embodiment of a retaining body according to the invention.

[0062] In principle, the retaining body 3 can be fastened on an arbitrarily oriented surface 21. Within the framework of the description of the figures, it is assumed without limiting generality that a retaining body 3 is attached to a vertical (component) surface 21, for example a wall. Directional specifications such as above or below refer to a retaining body 3 which is positioned in such a manner. Identical components or component portions are characterized with identical reference signs in the following description of the figures.

[0063] FIG. 1 shows a perspective view of a retaining device 1 according to the invention having an adhesive strip 2, which is effective on two sides, and a retaining body 3 according to the invention. To attach the retaining body 3, the user will first of all stick the adhesive strip 2, which is effective on two sides, at a desired position on a surface 21 and then press the retaining body 3 onto the adhesive strip 2. As an alternative to this, the adhesive strip 2, by way of a first adhesive surface 22, can also first of all be bonded with a rear surface 19 of the retaining body 3, and then, by way of its second adhesive surface 23 which is situated opposite the first adhesive surface 22, can be bonded to the surface 21. As a further alternative to this, the adhesive strip 2, by way of one of the two adhesive surfaces 22, can already be bonded 23 with the rear surface 19 of the retaining body 3, the adhesive surface 22, 23 remote from the rear surface 19 of the retaining body 3 being provided with a protective foil 28, 29.

[0064] The retaining body 3 comprises a, preferably cuboid, basic body 16 with a flat, level rear surface 19 and a front surface 27 which is situated opposite the rear surface 19. The outer contour of the retaining body 3 is realized preferably in a substantially rectangular manner in the projection plane of the front surface 27, an upper edge 17 and a lower edge 18, which is located opposite the upper edge 17, being aligned horizontally after installation. In addition, two side edges 31, 32, which each extend from the upper edge 17 to the lower edge 18 and thus delimit the basic body 16 in the vertical direction, are realized on the basic body 16. The retaining body 3 is preferably symmetrical to a plane, which is oriented normally to the rear surface 19 of the retaining body 3, and runs through a center straight line which is between the side edges 31, 32.

[0065] Other forms of the basic body 16, in particular with an oval or elliptical projection surface, are also possible as an alternative to this.

[0066] As shown in FIG. 2, a carrier element 4, which, proceeding from an oval or elliptical base 25, is realized centrally between the side edges 31, 32, protrudes from a plane of the basic body 16 on the front surface 27. The distance between the base 25 of the carrier element 4 and the upper edge 17 is smaller than the distance between the base 25 and the lower edge 18. In many cases, the user wishes for aesthetic reasons that the retaining body 3 is covered by an object which is retained thereon. As the retaining body 3 cannot be arbitrarily small in view of a rear surface 19 or adhesive surface that is ideally as large as possible, this is achieved simply by the carrier element 4 being arranged as close as possible to the upper edge 17 of the retaining body 3.

[0067] The carrier element 4 comprises, in a preferred manner, the form of a sloping truncated cone with an oval or elliptical base area. A straight line through two points on the top side of the carrier element 4, which at the same time provide contact points from the horizontal tangents of the lateral surface thereof, encloses an angle of between 0? and 90?, in a preferred manner between 0? and 20?, with a horizontal plane. A positive angle brings about a gradient toward the basic body 16 such that an object suspended on the retaining device 3 is pulled by gravity in the direction of the basic body 16, as a result of which a tilt moment with reference to a region of the adhesion which is below the carrier element 4 in the projection plane of the front surface 27 is reduced.

[0068] The carrier element 4 is advantageously realized such that it is able to be utilized with a plurality of fastening systems such as, for instance, picture hangers, folding eyelets, cables or saw-tooth hangers, and there is no need for a separate adapter for suspending an object. Consequently, a diameter of the carrier element 4 should not be too large so that objects with small fastening eyelets are also able to be suspended thereon. The dimension of the carrier element 4 toward small, however, is also delimited by the strength of the material as a very narrowly dimensioned carrier element 4 is, as a rule, able to carry less weight. The retaining body 3 should comprise a high resistance moment against deformation and, in particular, deflection.

[0069] A reinforcing structure 5, 6, 7, 25, which is connected non-detachably to the basic body 16, is realized on the front surface 27 of the retaining body 3. The reinforcing structure 5, 6, 7, 25 includes three reinforcing ribs 5, 6, 7 which join together in a region around the base 25 or realize said base together in an integral manner.

[0070] The first reinforcing rib 5 preferably extends in a straight manner between the base 25 of the carrier element 4 and the upper edge 17 of the retaining body 3. The second reinforcing rib 6, proceeding from a region which adjoins the base 25 at the side, first of all extends in the direction of the side edge 31 and continues along the side edge 31 up to the lower edge 18. The third reinforcing rib 7 corresponds to an axiallysymmetrical mirroring of the second reinforcing rib 6 along a longitudinal axis which extends through the base 25 and, proceeding from the region which adjoins the base 25 at the side, first of all leads in the direction of the side edge 32 and continues parallel to the second reinforcing rib 6 along the side edge 32 up to the lower edge 18.

[0071] The reinforcing ribs 5, 6, 7 divide the front surface of the retaining body 3 into three pressing surfaces 11, 12, 13 which are set back relative to the reinforcing ribs 5, 6, 7 and have a thinner wall thickness. A first pressing surface 11 is delimited by the first reinforcing rib 5, a first portion of the second reinforcing rib 6, the upper edge 17 and a region of the side edge 31. A second pressing surface 12, with reference to a mirroring along a longitudinal axis which extends through the base 25, is mirror-symmetrical to the first pressing surface 11 and is delimited by the first reinforcing rib 5, a first portion of the third reinforcing rib 7, the upper edge 17 and a region of the side edge 32.

[0072] The pressing surfaces 11, 12 defined by the reinforcing ribs 5, 6, 7 comprise a form which is inspired by a curved part outline of a fingertip. The first pressing surface 11 and the second pressing surface 12, in this case, are the same size and preferably comprise a surface area each of between 0.6 cm.sup.2 and 2.3 cm.sup.2. The surfaces of the first and of the second pressing surfaces 11, 12 are each smaller than the surface of the third pressing surface 13. The first and the second pressing surfaces 11, 12 are designated as upper pressing surfaces and the pressing surface 13 as the lower pressing surface. In a preferred manner, the first and the second pressing surfaces 11, 12, with in each case less than 2.3 cm.sup.2, are smaller than the average surface of a fingerprint such that during adhesion, when the retaining body 3 is pressed, the pressing pressure can be increased in this region compared to a full-surface contact of a fingertip. The size of the first and second pressing surfaces 11, 12, in this case, should not fall below 0.6 cm.sup.2 as it has been shown that, when installing the retaining body 3, the pressing force on the side of the user is otherwise reduced in an unwanted manner on account of a feeling of pain in the fingertip.

[0073] In order to ensure that the fingertips are able to reach the pressing surfaces 11, 12, 13, it is advantageous when the normal projection of the carrier element 4 onto the rear surface 19 of the retaining body 3 lies outside the corresponding normal projection of the pressing surfaces 11, 12, 13.

[0074] The third pressing surface 13 lies under the second and third reinforcing ribs 6, 7 and is delimited by the lower edge 18 and the side edges 31, 32 of the retaining body 3. The third pressing surface 13, in this case, is greater than one of the other pressing surfaces 11, 12 and comprises a surface area of at least 2.5 cm.sup.2. The surface areas of all the reinforcing ribs 5, 6, 7 are smaller than the surface areas of all the pressing surfaces 11, 12, 13.

[0075] In order to reduce stress maxima in the upper region of the adhesive strip 2, one-sided scarfing of the basic body 16 can be provided. One-sided scarfing is to be understood, in this context, as tapering of the cross section of the basic body 16 in the upward direction. As shown in FIG. 3, the cross section of the basic body 16 tapers in a preferred manner in the region from the lower shoulder of the base 25 of the carrier element 4 up to the upper edge 17 of the basic body 16. In a particularly preferred manner, the wall thickness of the pressing surfaces 11, 12 tapers as the height coordinates rise, as shown in FIG. 6, whilst the difference between the wall thickness of the first reinforcing rib 5, which is arranged in said region, and the wall thickness of one of the adjacent pressing surfaces 11, 12 remains constant.

[0076] For simplified positioning, positioning notches 14 can be provided on the oppositely situated side edges 31, 32 at the identical height, as shown in FIG. 2 and FIG. 3. They lie on a horizontal tangent which contacts the lateral surface of the carrier element 4 at the transition between the base 25 and the carrier element 4. The positioning notches 14 serve for positioning the retaining body 3 in a vertical manner, said retaining body consequently being able to be installed relative to a vertical coordinate or to a fixed reference point. In an analogous manner, positioning notches 15 can be provided in the center of the upper edge 17 and the center of the lower edge 18 for horizontal alignment.

[0077] As shown in FIG. 3, a support plate 26 can be arranged or integrally molded on the free end of the carrier element 4. A region of the support plate 26 projects beyond the carrier element 4. In order also to be able to hang objects with very small eyelets on the carrier element 4, the support plate 26 can be connected to the carrier element 4 so as to be detachable, for example as a result of a plug or threaded connection. As an alternative to this, the carrier element 4 can also be developed in a tapering manner in the form of a rose thorn. The carrier element 4, in this case, preferably comprises an angle ? of approximately between 10? and 20? to a normal through the base 25, as a result of which an object suspended on the carrier element 4 is able to slip in the direction of the base 25 as a result of gravity acting on the object.

[0078] FIG. 4 shows the rear surface 19 of the retaining body 3. A vent duct 20, which is preferably realized in a V-shaped manner in profile, is realized on the rear surface 19. The vent duct 20 serves for the purpose of avoiding air pockets between the adhesive layer of the adhesive strip 2, which has two effective sides, and the rear surface 19 of the retaining body 3.

[0079] FIG. 10 shows the installation of a retaining device 1 according to the invention. To this end, the user presses each of the three pressing surfaces 11, 12, 13 one after the other with a fingertip, the surface regions of the surface 21 or of the rear surface 19 of the retaining body 3 moistened by the adhesive surfaces 22, 23 of the adhesive strip 2 being enlarged with each pressing. Consequently, the retaining power of the adhesive strip 2, which is effective on two sides and retains the retaining body 3 on the surface 21, is increased, which improves the user characteristics of the retaining device 1 overall.

[0080] FIGS. 9a, 9b and 9c show further embodiments of a retaining body 3 according to the invention. In the case of all of the embodiments, the front surface 27 of the retaining body 3 is divided by reinforcing ribs 5, 6, 7 into several pressing surfaces 11, 12, 13, the reinforcing ribs 5, 6, 7 extending in each case through the base 25 of the carrier element 4 or being placed on said base 25. Stress maxima, which occur especially in the transition region between the carrier element 4 and the basic body 16, are absorbed by the reinforcing ribs 5, 6, 7 and are directed into the retaining body 3 without it resulting in material failure. In addition, the reinforcing ribs 5, 6, 7 increase the flexural rigidity and the resistance moment of the retaining body 3, which wants to deform about a horizontal axis as a result of the weight of the suspended object engaged on the carrier element 4.

[0081] As shown in FIG. 5 and FIG. 6, the wall thickness of the retaining body 3 in the region of the reinforcing ribs 5, 6, 7 is greater than the wall thickness in the region of the pressing surfaces 11, 12, 13.

[0082] FIG. 7 shows a wider realization of the retaining body 3 which can be attached on a surface 21 by means of two adhesive strips which are arranged side by side in parallel and are effective on two sides. The pressing surfaces 11, 12, 13a, 13b are realized in said realization with a haptically palpable structure. Such structures can be generated, for example, in conjunction with etched or engraved surfaces. A further option consists in the grid-like arrangement of a plurality of raised hemispherical or disk-shaped elements with a diameter of between 0.1 mm and 3 mm and a relative distance between one another of between 0.7 mm and 6 mm. The structure can also have a communicative or directing function and, for example, evoke a fingerprint. This can serve as support during use.

[0083] Described below, as shown in FIG. 11, is the bonding of the retaining device 1 with a retaining body 3 and an adhesive strip which is effective on two sides. A frequent challenge when attaching devices which are fastened on a surface 21 by means of adhesive strips 2, which are effective on two sides, is to provide a sufficient pressing force during adhesion, which pressing force is to be effective additionally on the sticky adhesive surfaces 22, 23 of the adhesive strip 2 as a whole. It is known from tests that, in the majority of cases, a user attaches a retaining body 3 with an adhesive strip 2 attached on the rear side by pressing once onto the front surface 27 of the retaining body 3 with the tip of the thumb and at a force of between 30 and 80 Newtons. The average surface of a fingerprint is within the range of between 2 cm.sup.2 and 3 cm.sup.2, as a result of which, with reference to the contact surface between retaining body 3 and fingertip, a pressure region of between 100 kPa and 400 kPa is produced. This means in the case of retaining bodies disclosed in the prior art that the pressing force, which is exerted only once, is distributed in a first approximation onto the surface of the adhesive strip 2 which is situated between the external surface 21 and the retaining body 3 and is effective on two sides. If a smaller pressing force of 30 Newtons is assumed, a pressure of only just 30 kPa in the case of an adhesive strip 2 with a surface of 10 cm.sup.2 would be the result. Reliable moistening of the substrate by the adhesive of the adhesive strip 2, in particular on a rough surface 21, is no longer ensured in the case of said low pressure. In this case, said estimation does not take into consideration any further effects, such as loss through deformation of the adhesive strip 2, which reduce the effective pressure on the adhesive surfaces 22, 23. Part-plastic deformation of the adhesive strip 2 can be desired as typical surfaces 21, on which the retaining device 1 is used, are not ideally smooth and part-plastic deformation enables adaptation to the real outline of the surface 21 within certain boundaries.

[0084] In the case of the retaining device 1 according to the invention with the retaining body 3 according to the invention, the pressing surface available overall is increased by the three pressing surfaces 11, 12, 13. Where the force expended is the same and there is a pressing force of 30 Newtons, the pressing pressure is increased to between 50 kPa and 70 kPa when the three pressing surfaces 11, 12, 13 are pressed, as a result of which a substantially improved bonding result is obtained.

[0085] To fix the retaining device, first of all a first protective foil 28 is removed from a first adhesive surface 22 of the adhesive strip 2, which is effective on two sides, and the adhesive strip is aligned to the wall by way of the exposed adhesive surface 22. Then, as a result of pressure onto the side of the adhesive strip 2 located opposite the free adhesive surface 22, the adhesive strip 2 is bonded with the surface 21. A second protective foil 29, which covers a second adhesive surface 23 of the adhesive strip 2, which is effective on two sides, is then detached from the adhesive strip 2. The retaining body 3 can then be positioned with its rear surface 19 covering over the second adhesive surface 23 of the adhesive strip 2 and pressed. In order to achieve good moistening of the surfaces 19, 21 contacted by the adhesive surfaces 22, 23, pressure is exerted onto the first pressing surface 11 for several seconds with the tip of the thumb. Pressure is then exerted for several seconds onto the second pressing surface 12 and finally pressure is exerted for several seconds onto the third pressing surface 13 with the tip of the thumb. As an alternative to this, pressure can also be exerted onto the third pressure surface 13 with the tip of the thumb and pressure can be exerted in parallel onto the first and second pressing surfaces 11, 12 with the fingertips of two further fingers.

[0086] As an alternative to this, one of the protective foils 28, 29 of the adhesive strip 2 or the adhesive strip 2 itself can be marked or can carry a notch for precise positioning. Consequently, the positioning notches 14, 15 on the retaining body 3 can be moved to coincide with the positioning notches on the adhesive strip or can be aligned with said positioning notches.

[0087] A further option for positioning the retaining body 3 in relation to the adhesive strip 2 consists in first of all placing the upper edge 17 of the retaining body 3, which is set at an angle, on an upper edge 30 of the adhesive strip 2. With the upper edges 17, 30 being placed one on top of the other, the angle between the external surface 21 and the rear surface 19 of the retaining body 3 is then reduced until the retaining body 3 rests with its rear surface 19 on the second adhesive surface 23 of the adhesive strip 2.

[0088] In an advantageous manner, the retaining body 3 can be detached from the surface 21 without trace and residue and without damaging the surface 21 and/or the retaining body 3. As shown in FIG. 8, this can be achieved with known pull-release adhesive strips 2 which can be detached from the adhesive join between the surface 21 and the retaining body 3 by pulling on a protruding, non-adhering part portion 24 of the adhesive strip 2 in the direction of the adhesion plane.

[0089] A plastics material, which can be selected in dependence on various factors and sites of operation, is provided as the production material of the retaining body 3. In particular, the production material should be compatible with the adhesive composition of the adhesive strip 2 and should adhere reliably thereto. In addition, the production material should comprise resistance to the most common environmental influences, such as moisture, UV radiation or ozone and exhaust emissions, without its material characteristics being substantially impaired over a suitable period. Low water absorption is desirable for use in wet cells as water absorption of the retaining body as a rule weakens the quality of the adhesion.

[0090] A material which is compatible with adhesive strip, which are based on styrene compounds with standard industrial adhesive resins and further additives is polystyrene. The disadvantageous tendency to form stresses can be reduced by using special qualities, such as high impact polystyrene (HIPS), such as, for example, polystyrene 432B. As an alternative to this, it is possible to use glass fiber-reinforced polystyrene grades, both syndiotactic polystyrene and normal polystyrene being able to be used. In a preferred manner, the (glass) fiber proportion is between 10% and 50%, in a particularly preferred manner between 20% and 40%, of the filler content such as, for example, in the case of the syndiotactic type Schulatec PS-S-GF 40. Determination of the filler content of reinforcing fibers can be found in DIN EN ISO 11667. Styrene acrylonitrile (SAN), acrylonitrile-styrene-acrylate (ASA), acrylonitrile-butadiene-styrene (ABS) and glass fiber-reinforced acrylonitrile-styrene-acrylate are also suitable as production materials. As an alternative to this, carbon fiber-reinforced plastics materials, in particular carbon fiber-reinforced epoxy resins or carbon fiber-reinforced polyether ether ketone (PEEK), can also be used.

[0091] As an alternative to this, the retaining body 3 can also be realized from steel, in particular high-grade steel, an aluminum alloy or a titanium alloy.

[0092] FIG. 12 shows a further exemplary embodiment of a retaining body 3 according to the invention. With the design being identical to FIG. 2 to the greatest possible extent, only the differences will be looked into below. In a simplified version, the reinforcing rib 5 is omitted such that the retaining body 3 only comprises two pressing surfaces 11, 13, the upper pressing surface 11 extending over the entire width of the retaining body 3 and not being divided into two pressing surfaces, as in FIG. 2, by the vertically extending reinforcing rib. As an alternative to this, in the case of a simple embodiment with only two pressing surfaces, the reinforcing ribs 6, 7 can also be replaced by horizontally extending reinforcing ribs. As a result of the upper pressing surface 11 being smaller than the lower pressing surface 13, it is also achieved in the case of the embodiments according to FIG. 11 and FIG. 12 that, as a result of the small pressing surface, the retaining body 3 experiences a greater surface pressing during pressing in the particularly strongly exposed region above the carrier element 4 such that a better adhesion result is obtained.

LIST OF REFERENCES

[0093] 1 Retaining device [0094] 2 Adhesive strip [0095] 3 Retaining body [0096] 4 Carrier element [0097] 5 Reinforcing ribs [0098] 6 Reinforcing element [0099] 7 Reinforcing element [0100] 11 Pressing surface [0101] 12 Pressing surface [0102] 13 Pressing surface [0103] 14 Positioning notches [0104] 16 Basic body [0105] 19 Rear surface [0106] 20 Vent duct [0107] 21 Surface [0108] 22 Sticky adhesive surface [0109] 23 Sticky adhesive surface [0110] 24 Non-adhering part portion [0111] 25 Point of applied force/base [0112] 27 Front surface [0113] 28 Protective foil [0114] 29 Protective foil [0115] 31 Side edge [0116] 32 Side edge