Device for fastening electronic components to a tire casing

The fastening device with a uniform array of recessed and protruding elements addresses mechanical durability and adhesive failure issues, ensuring reliable and durable attachment of electronic components in tire casings.

JP2025536822APending Publication Date: 2025-11-07MICHELIN & CO (CIE GEN DES ESTAB MICHELIN)
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Patent Information

Application Number
JP2025530533
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-11-25
Filing Date
2023-11-15
Publication Date
2025-11-07

AI Technical Summary

Technical Problem

Existing fastening devices for electronic components in tire casings face issues with mechanical durability and adhesive failure due to thermomechanical stresses, particularly when fastened after tire curing.

Method used

A fastening device with a base and a retaining wall featuring a uniform array of recessed and protruding elements on its outer surface, designed to ensure controlled adhesive distribution and mechanical strength, preventing adhesive leakage and failure.

Benefits of technology

Enhances mechanical durability and adhesive reliability, ensuring consistent adhesive thickness and controlled failure modes, thereby improving the durability and functionality of electronic components within the tire casing.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention relates to a device (10) for attaching an electronic component to a tire wall, comprising a sole (11) that can be attached to the tire wall by an outer surface (15), and a retaining wall (12) that extends from the sole (11) to a free edge (13) and defines, together with the sole (11), an open volume (20). The volume (20) that can receive at least a portion of the electronic component has an opening (16) bounded by the free edge (13) of the retaining wall (12) that can be deformed to insert the electronic component into or remove it from the volume (20). The outer surface (15) of the sole (11) comprises an array of recessed elements (101, 201) and protruding elements (102, 202) that define a maximum height variation between 10 μm and 200 μm.
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Description

[Technical Field]

[0001] The present invention relates to a device for fastening electronic components to a tire casing, the purpose of which is to transmit identification information about the tire casing or physical parameters of the tire casing measured by the electronic components over the course of the tire casing's life. [Background technology]

[0002] The development of electronic objects within tire casings has made it possible to make the tire casing connectable and in a connected state, which has stimulated the development of new services for optimizing the use of tire casings, for example. Currently, these electronic components sometimes have thermomechanically fragile components, which require the electronic components to be inserted after the tire casing is manufactured. That is, the insertion of fastening devices as an interface between the electronic components and the tire has emerged. These fastening devices are generally elastic so as to conform to the substantial deformations that the tire casing undergoes over the course of its use and to attenuate the stresses transmitted to the electronic components so as not to place high stresses on the tire casing. One of the most commonly used designs for the device is a patch having a base that is used to fasten to the tire casing and is provided with a wall that closes on itself and extends from the base to an opening. The wall contributes to holding or maintaining the electronic component in a fixed position within the device, and the electronic component is tightly fitted inside this wall, which deforms elastically. The opening allows the insertion and removal of the electronic component into and from the patch due to the elasticity of the opening material.

[0003] WO 2018 / 150141 shows a patch of this nature, which has a fastening system for limiting openings in particular, but which in all respects is similar to a patch for fastening an electronic object to a tire casing. In addition, this type of patch can present problems with the mechanical strength of the system including the patch and the electronic component over the course of use of the tire casing to which the system is fastened, especially when the patch, with or without electronics, is fastened to the tire after the tire casing has cured via a connecting adhesive. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2018 / 150141 Summary of the Invention [Problem to be solved by the invention]

[0005] The object of the following subject matter of the present invention is to solve the problem of mechanical durability of the fastening patch and at the same time provide an economical, reliable and non-impactful fastening patch for the operation of the electronic components accommodated within the fastening patch. [Means for solving the problem]

[0006] The present invention provides a base that can be fixed to the tire casing wall through its outer surface; a closure retaining wall capable of retaining an electronic component, extending from the base to the free edge and defining an open volume together with the base; a volume capable of receiving at least a portion of the electronic component, the volume having an opening defined by an inner surface of the base and by a retaining wall, the opening being bounded by a free edge of the retaining wall that can be deformed for insertion or removal of the electronic component into or from the volume; an outer surface of the base including a uniform array of recessed and protruding elements defining a maximum variation in height between 10 μm and 200 μm; 1. A device for fastening an electronic component to a wall of a tire casing, comprising: The fixing device is characterized in that the arrangement of the array of recessed elements and protruding elements is concentric around a single point on the outer surface of the base or in the form of a checkerboard pattern in which paired adjacent tiles are recessed elements and protruding elements. The present invention relates to a device for fixing the above.

[0007] The fastening device has a volume through the array of recessed and protruding elements that will act as a reservoir for receiving an adhesive-type product the moment the device is fastened to the wall of the tire casing. In this specification, the term "uniform" is understood to mean that the recessed and protruding elements are uniformly distributed on the outer surface of the base. That is, a uniform distribution of the reservoir of adhesive that will be applied to the outer surface of the base the moment the base is fastened to the inner wall of the tire is guaranteed. Although direct contact is provided between the outer surface of the base and the inner wall of the tire casing, the array ensures the presence of adhesive between the outer surface of the base and the inner wall of the tire casing at the recessed elements. By ensuring a minimum height between the bottom of the base and the base's bearing plane, a predetermined thickness of adhesive is guaranteed throughout the entire array, evenly distributed over the entire outer surface of the base, thereby making it possible to control this average thickness of adhesive. Depending on the properties of the adhesive and the desired fastening failure mode, the array makes it possible to control the desired thickness. Specifically, the fastening failure is either at the interface between the adhesive and the base, or at the interface between the adhesive and the inner wall of the tire casing. This fastening failure may also be a separation of the internal structure of the adhesive itself, depending on the type of stress the adhesive is subjected to. This separation of the adhesive structure is controlled by the thickness of the adhesive film in certain products. Thus, during the adhesive fastening of the fastening device to the inner wall of the tire casing, the array of recessed and protruding elements ensures the location, nature, and threshold above which the failure occurs.

[0008] In a first embodiment of the uniform array, the array is composed of a plurality of protruding elements regularly spaced apart from one another by recesses in the radial direction. These elements are cylindrical, concentric around a single point on the outer surface of the base along an axis perpendicular to the outer surface. These cylindrical elements have, for example, circular or elliptical sections. This embodiment of the uniform array of recesses is suitable for the production of the fixation device by molding, although other processes can also be used. Specifically, it is sufficient to create an imprint of this array on the die of the mold that defines the outer surface of the base so that the concentric uniform array is produced simultaneously with the production of the fixation device. This has the advantage that the protruding elements of the array are manufactured integrally with the base of the fixation device. Furthermore, as a result of the concentricity of these elements, the final device with the uniform array is easy to remove from the mold, even with respect to the external grooves. Furthermore, this molding process ensures that the uniform array is reproducible at lower production costs. On the other hand, this technology is designed to accommodate very large residual void volumes in the fixation device, and this design is optimal for certain types of adhesives.

[0009] In a second embodiment of the uniform array, the array comprises a checkerboard pattern having boxes corresponding to alternating protruding and recessed elements. Preferably, the checkerboard pattern is defined in two orthogonal directions, although having the two directions at a 30 degree angle to each other is sufficient, as the checkerboard pattern can be particularly effective for cleaning surfaces prior to coating the surface.

[0010] This checkerboard pattern is advantageously produced after the manufacture of the fixing patch, which is generally obtained by a molding process. This production can be a chemical process following the application of an activator through a stencil positioned on the outer surface of the base. Next, by applying a reactive agent to the entire outer surface of the base, the checkerboard pattern predetermined by the shape of the stencil is embossed. The aforementioned production can also be a mechanical process in which a brush with rows of regularly spaced bristles is rubbed over the outer surface of the base in two precisely controlled directions. After the checkerboard pattern production step and before the application of the adhesive, the outer surface of the base must be cleaned to remove material residues and make it chemically inactive. Finally, the aforementioned production can be a thermal treatment with a laser, whose beam exhibits successive straight lines spaced apart by a predetermined distance that constitutes the width of the groove elements. In this case, the laser's passage in two intersecting directions generates a uniform checkerboard pattern of recessed and protruding boxes. The thermal treatment process makes it possible to produce recesses with small dimensions, both in terms of depth and width.

[0011] Advantageously, the width of the recessed element between two protruding elements is between 500 μm and 1500 μm.

[0012] It is also necessary to ensure in each bond pad that the failure mode is controlled beyond the total volume of adhesive that can be evenly distributed on the outer surface of the base, so that weakening experienced by a few pads does not result in the transfer of stress to other pads, resulting in gradual failure of the fixation across the base and collapse of the fixation across the base to the inner wall of the tire casing.

[0013] Here, the mechanical strength of this pad is controlled, on the one hand, by the average height variation between the bottom of the recessed element and the top of the protruding element, and, on the other hand, by the distance separating the two protruding elements, which corresponds to the width of the recessed element. By controlling this second parameter, it is ensured that the dimensions of each adhesive pad are sufficient to individually guarantee the mechanical strength of the pad. The required width may vary depending on the nature of the adhesive used to fasten the fastening device to the inner wall of the tire casing and the type of break desired for this fastening.

[0014] Highly advantageously, the contour of the outer surface of the base includes protrusions having a height less than or equal to the maximum height of the uniform array of protruding elements on the outer surface of the base.

[0015] The presence of the protrusions positioned on the contour of the base's outer surface prevents adhesive from leaking through these locations to the outside of the base's outer surface when the protrusions are absent. Therefore, it is ensured that the amount of adhesive applied to the base's outer surface will remain below the base, regardless of the concave shape of the tire casing's inner wall. As a result, the protrusions ensure that the entire volume of adhesive is present below the base. In particular, if the base's outer surface is coated with more than the recommended amount, the average volume of adhesive will be greater than the height of the protrusions, which will result in excess adhesive leaking during the adhesive bonding operation of the fastening device to the tire's inner wall. In addition, the protrusions allow for mechanical control of the amount of adhesive applied to the uniform array of recessed and protruding elements during the fastening device coating process by scraping off the applied adhesive with a sword bit that can press against the outer surface of the pattern.

[0016] In particular, the protrusions on the contour of the outer surface have a width of less than 500 μm.

[0017] The outer surface of the protrusions, which is proportional to the width of the protrusions, does not contain adhesive or does not contain enough of it to ensure firm adhesion of the protrusions to the inner wall of the tire casing, but the dimensions of the array are still sufficient to ensure the mechanical strength of the fastening device relative to the tire casing.

[0018] In particular, the arrangement of the array of recessed and protruding elements is concentric, so that the void volume defined by the array is 30 mm 3 and 120mm 3 It is between.

[0019] Advantageously, the outer surface of the base includes at least three projecting elements.

[0020] Advantageously, the arrangement of the array of recessed and protruding elements is in the form of a checkerboard, so that the void volume defined by the array is less than 1 mm 3 and 10mm 3 It is between.

[0021] The invention also relates to a tire casing comprising a crown (S) and two side walls (F) extending therefrom, said two side walls (F) terminating in two beads (B) that can be connected to a wheel, and an arrangement of a fixing device, characterized in that the fixing device is fixed to one of the faces of the tire casing, preferably to the wall that is located deepest towards the inside of the tire casing.

[0022] The placement of the fastening device with the tire casing is the primary purpose of the fastening device, and in this case it is preferred to place the fastening device inside the fluid cavity bounded by the inner wall of the tire casing and the wheel rim to which the tire casing is mounted, in order to protect the electronic components intended to be inserted into the fastening device.

[0023] Advantageously, the fixing device is fixed along the crown (S) of the tire casing when the tire casing is mounted on the transport vehicle, preferably under a groove positioned towards the outside of the vehicle.

[0024] With regard to the function for measuring deformations of the tire casing, which can be observed on signals from various sensors of the electronic component intended to be inserted into the fastening device, it is more advantageous to arrange the fastening device and, consequently, the associated electronic component along the crown (S) of the tire casing. For example, signals from a radial impact sensor or an accelerometer make it possible to detect the contact patch where the tire casing is in contact with the ground. Information about the length of the contact patch makes it possible to estimate the static load supported by the tire casing as well as the instantaneous rotational speed of the tire casing. The estimation of these parameters of the tire casing is improved, both qualitatively and quantitatively, by improving the sensitivity of the highly sensitive sensors of the electronic component housed in the fastening device due to the promotion of adhesion between the fastening device and the inner wall of the tire casing.

[0025] Very advantageously, the portion of the wall that is located deepest towards the inside of the tire casing and that must receive the fastening device comprises an array of recessed and protruding elements that comprises a maximum variation in height between 10 μm and 100 μm.

[0026] By forming a first uniform array of recessed and protruding elements on the outer surface of the base, a certain amount of adhesive is guaranteed at the interface between the outer surface of the base and the inner wall of the tire casing. However, if the volume of adhesive thus formed is not sufficient to ensure the mechanical strength of each adhesive pad corresponding to the recessed elements, it is possible to envision adding a second uniform array of recessed and protruding elements to the wall of the tire casing in addition to this individual volume. In addition, statistically, this second uniform array can generate connection pads between the two components at the locations of the protruding elements on the outer surface of the base, thereby making the adhesive film between the two elements more uniform despite the presence of the two uniform arrays.

[0027] Preferably, this second uniform array is achieved after a step of stripping the inner wall of the tire casing along the zone for receiving the fastening device. This allows optimizing the surface condition of the inner wall of the tire casing before fastening the fastening device. Additionally, advantageously, the second uniform array is not an inverted image of the first uniform array on the outer surface of the base. If the first uniform array is concentric, the second array may be checkered. Similarly, if the first array is checkered, the second uniform array may be checkered in two directions that do not coincide with one of the directions of the first checkered pattern.

[0028] Advantageously, the fixation device is fixed by an adhesive included in the group comprising cyanoacrylates and silanes.

[0029] For elastomeric materials of tire casings having relatively airtight inner walls, the above-mentioned adhesives can be used because they have mechanical strength comparable to these elastomeric materials with respect to the thermomechanical stresses that tire casings are typically subjected to during use.

[0030] The invention also relates to an arrangement of a tire casing and a fastening device fixed to its inner wall, in which an electronic component is inserted into the fastening device of the arrangement.

[0031] Preferably, the tire casing in this arrangement is mounted on the wheel, preferably in an inflated state.

[0032] This is the ultimate purpose of the fastening device, namely, to receive the electronic component when it is fastened to the inner wall of the tire casing. In particular, the improved fastening ensured by the special structure of the fastening device on the outer surface of the base ensures that the signal level available to the sensor of the electronic component can be used to derive information specific to the tire casing during operation without being unduly hindered by the presence of the fastening device.

[0033] The invention will be better understood on reading the following description, given by way of non-limiting example only and with reference to the accompanying drawings in which the same reference numbers represent the same parts throughout, and in which: [Brief explanation of the drawings]

[0034] [Figure 1] FIG. 1 is a perspective view of a device for fixing an electronic component to a tire. [Figure 2] 1A and 1B are bottom and side views of one and the same fixation device according to a first embodiment of the present invention; [Figure 3] FIG. 10 is a bottom view of a fixation device according to a second embodiment of the present invention. [Figure 4] 1 is a perspective view in cross section of a tire casing equipped with a fastening device according to the invention; DETAILED DESCRIPTION OF THE INVENTION

[0035] 1 is a perspective view of a prior art device 10 for fastening electronic components to a tire casing. In this case, the fastening device 10 is of the opening type, i.e., the electronic components are inserted into or removed from the fastening device through an orifice that is accessible even when the fastening device 10 is fastened to the tire casing. As a result, the operations for inserting or removing the electronic components into or from the fastening device 10 can be performed directly on the tire casing.

[0036] The fastening device 10 has a base 11, the function of whose outer surface is to be fastened to the surface of a tire casing using prior art solutions known to those skilled in the art. In this case, the fastening device 10 exhibits rotational symmetry around a rotation axis perpendicular to the base 11. A retaining wall 12, which closes over 360 degrees, adjoins the base 11. The retaining wall 12 of the fastening device 10 has an opening 16 bounded by its free edge 13. The orifice 16 opens onto an open volume 20 bounded by an inner surface 14 of the base 11 and an inner surface 17 of the retaining wall 12. The orifice 16 is deformable to allow the insertion and removal of an electronic component into or from the open volume 20. The elastic properties of the material of the retaining wall 12 allow this expansion of the orifice 16 during the insertion and removal phases. In addition, it also ensures a holding or fastening force for the electronic component when it is accommodated in the open volume 20.

[0037] FIG. 2 shows the array of protruding and recessed elements on the exterior surface 15 of the base 11.

[0038] The array is in the form of concentric elements around a center point on the outer surface 15 of the base 11. This forms an essentially uniform array with void volume evenly distributed both angularly and radially around this center point. The recesses on the outer surface 15 of the base 11 are more uniformly distributed with a greater number of alternations between the recessed elements 101 and the protruding elements 102. In this case, these elements, both the protruding elements 102 and the recessed elements 101, have identical dimensions to each other in terms of width and height, depending on their type. To improve the uniformity of adhesive distribution throughout the array, the width of the recesses 101 can be varied depending on the radial distance of the recessed elements 101 relative to the center point.

[0039] The outer contour of the outer surface 15 of the base 11 is composed of protrusions 21 having a height less than or equal to the maximum height 23 of the protruding elements 102 relative to the depth 22 of the recessed elements 101. This protrusion 21 therefore constitutes a barrier that delimits the adhesive at the outer surface 15 of the base 11. This ensures that the adhesive present between the outer surface 15 of the base 11 and the inner wall of the tire does not end up being greater than a predetermined volume. Furthermore, by controlling the amount of adhesive applied to the outer surface 15 of the base 11, the volume of adhesive required to connect the fastening device 10 to the tire is also controlled. In order to obtain the right type of break, both in terms of location and threshold for triggering the break, it is possible to adjust the depth of the recessed elements 101 depending on the type of adhesive used to fasten the device to the wall of the tire casing and the desired break nature of the connection.

[0040] FIG. 3 shows an array of protruding and recessed elements on the outer surface 15 of the base 11 according to a second embodiment.

[0041] The array is in the form of a checkerboard pattern consisting of alternating recessed boxes 201 and protruding boxes 202 on the outer surface 15 of the base 11. This forms an essentially uniform array with evenly distributed void volume on the outer surface 15 of the base. In this case, both the protruding elements 202 and the recessed elements 201 have identical dimensions with respect to their perimeter. To improve the uniformity of the adhesive distribution throughout the array, the specific dimensions of the boxes must be reduced, thereby ensuring a more precise distribution of the adhesive in these boxes. In this case, the checkerboard pattern is obtained by passing a metal object in two perpendicular directions to achieve a sufficient recess depth in the outer surface 15 of the base 11. To achieve a shallower depth, a linear laser scan across the outer surface 15 followed by a heat treatment of the outer surface 15 of the base with a laser beam can be envisioned. In this case, it is sufficient to define two orthogonal laser scanning directions to achieve an orthogonal checkerboard pattern. A step of cleaning the outer surface 15 of the base before applying the adhesive is recommended. Naturally, instead of a rectangular checkerboard, a diamond-shaped checkerboard pattern can also be constructed. However, to ensure effective cleaning at the acutest angles of the diamond, it is preferred that the angle formed by the two directions of the checkerboard be at least 30 degrees.

[0042] The outer contour of the outer surface 15 of the base 11 is composed of protrusions 21 having a height that is less than or equal to the maximum height 23 of the protruding elements 202 relative to the depth 22 of the recessed elements 201. This protrusion 21 therefore constitutes a barrier that delimits the adhesive at the outer surface 15 of the base 11. This ensures that the adhesive present between the outer surface 15 of the base 11 and the inner wall of the tire does not exceed a predetermined volume. Furthermore, by controlling the amount of adhesive applied to the outer surface 15 of the base 11, the volume of adhesive required to connect the fastening device 10 to the tire is also controlled. In order to obtain the right type of break, both in terms of location and threshold for triggering the break, it is possible to adjust the depth of the recessed elements 201 depending on the type of adhesive used to fasten the device to the wall of the tire casing and the desired break nature of the connection.

[0043] 4 shows a cross section of a pneumatic tire 100 according to the invention, which is also a tire casing, with a crown S extending by two sidewalls F and terminating in two beads B. In this case, the tire 100 is intended to be mounted at the locations of the two beads B on a wheel, not shown in this figure. A closed cavity is thus defined that confines at least one pressurized fluid, this cavity being bounded by a second radially inner surface 130 of the pneumatic tire 100 and the outer surface of the wheel. The pneumatic tire 100 also includes a first radially outer surface 140 thereof.

[0044] Note the reference axis 201, which corresponds to the reference axis or natural axis of rotation of the pneumatic tire 100, and the central plane 211, which is perpendicular thereto and equidistant from the two beads B. The intersection of the reference axis 201 and the central plane 211 determines the center 200 of the pneumatic tire. A Cartesian coordinate system is defined at the center 200 of the pneumatic tire, consisting of the reference axis 201, a vertical axis 203 perpendicular to the ground, and a longitudinal axis 202 perpendicular to these two axes. Furthermore, an axial plane 212 is defined that passes through the reference axis 201 and the longitudinal axis 202, parallel to the ground and perpendicular to the central plane 211. Finally, the plane perpendicular to both the central plane 211 and the axial plane 212 and passing through the vertical axis 203 is called the vertical plane 213.

[0045] Any mass point of the pneumatic tire 100 is uniquely defined by its cylindrical coordinates (Y, R, θ). The scalar Y represents the axial distance to the center of the pneumatic tire 200 in the direction of the reference axis 201, as defined by the orthogonal projection of the mass point of the tire 100 onto the reference axis 201. A radial plane 214 is defined that forms an angle "θ" about the reference axis 201 with respect to a vertical plane 213. A mass point of the pneumatic tire 100 is represented by its distance R to the center of the pneumatic tire 200 in a direction perpendicular to the reference axis 201, as identified by the orthogonal projection of the mass point on the radial axis 204 within the radial plane 214. The unit vector perpendicular to the radial plane 214 and that forms an equilateral triangle with the axial unit vector 201 and the radial unit vector 204 represents the circumferential direction of the tire casing 100.

[0046] The tire 100 has a fastening device 10 on its radially inner surface 130, fixed to this surface 130 by adhesive bonding according to conventional techniques when fastening devices are made of elastomeric material. The fastening device 10 is fixed along the crown S of the tire casing 100, and the fastening device 10 positioned in this way does not cause significant problems during the operation of mounting the tire casing 100 on a wheel or removing it from the wheel, thereby improving the durability of the tire casing 100. In particular, the fastening device 10 is located in a zone away from the bead B of the tire casing 100. In this case, the fastening device 10 is equipped with electronic components in its open volume, which constitutes a housing designed to receive the electronic components. As a result, the tire casing 100 can be immediately mounted on the wheel to form a mounting assembly in this case. The electronic components can deliver various functions, such as identifying certain components, such as the tire itself. However, the electronic components can also be equipped with pressure and / or temperature sensors for evaluating the inflation pressure of the mounting assembly. Finally, it is also equipped with sensors, such as accelerometers or flexometers, that directly measure the curvature of the tire casing, making it possible to derive typical tire variables such as angular velocity, distance traveled, applied static load, etc. All of these variables make it possible to identify performance qualities of the tire casing, such as, for example, the amount of wear of the tire casing, its grip, or specific variables of the ground on which the tire casing runs. [Explanation of symbols]

[0047] 11. Base 15 Exterior 21 Protrusion 201 Depression element 202 Protruding elements

Claims

1. a base (11) that can be fixed to the wall of the tire casing through its outer surface (15); a closing retaining wall (12) extending from said base (11) as far as a free edge (13) and defining an open volume (20) together with said base (11) and capable of retaining electronic components; Including, the volume (20) capable of receiving at least a portion of an electronic component and defined by the inner surface (14) of the base (11) and by the retaining wall (12) has an opening (16) bounded by the free edge (13) of the retaining wall (12), the opening (16) being deformable for insertion or removal of an electronic component into or from the volume (20); the outer surface (15) of the base (11) comprises a uniform array of recessed elements (101, 201) and protruding elements (102, 202) defining a maximum variation in height between 10 μm and 200 μm; A device (10) for fastening electronic components to a wall of a tire casing, comprising: the arrangement of the array of recessed elements (101) and protruding elements (102) is concentric around a single point on the outer surface (15) of the base (11) or in the form of a checkerboard pattern, each pair of adjacent tiles of which is a recessed element (201) and a protruding element (202); A fixation device (10) characterized in that:

2. 2. The fixation device (10) according to claim 1, wherein the width of the recessed element (101, 201) between two protruding elements (102, 202) is between 500 μm and 1500 μm.

3. 3. The fixation device (10) according to claim 1 or 2, wherein the contour of the outer surface (15) of the base (11) includes a protrusion (21) whose height is less than or equal to the maximum height (23) of the protruding elements (102, 202) of the uniform array on the outer surface (15) of the base (11).

4. 4. The fixation device (10) according to claim 3, wherein the protrusions (21) on the contour of the outer surface (15) have a width less than 500 μm.

5. The arrangement of the array of the recessed elements (101) and protruding elements (102) is concentric so that the void volume defined by the array is less than 30 mm 3 and 120mm 3 The fixation device (10) according to any one of claims 1 to 4, wherein

6. The fixation device (10) according to claim 5, wherein the outer surface (15) of the base (11) comprises at least three protruding elements (102).

7. The arrangement of the array of recessed elements (101) and protruding elements (102) is in the form of a checkerboard, so that the void volume defined by the array is less than 1 mm 3 and 10 mm 3 The fixation device (10) according to any one of claims 1 to 4, wherein

8. 8. The arrangement of a tire casing (100) comprising a crown (S) and two side walls (F) extending from said crown (S) and terminating in two beads (B) capable of being connected to a wheel, and of a fastening device (10) according to any one of claims 1 to 7, the fixing device (10) is fixed to one of the faces of the tire casing, preferably to the wall located furthest towards the inside of the tire casing (100); Placement.

9. 9. The arrangement according to claim 8, wherein the fixing device (10) is fixed along the crown (S) of the tire casing (100).

10. 10. The arrangement according to claim 8 or 9, wherein the part of the wall that is located furthest towards the inside of the tire casing (100) and that must receive the fastening device (10) comprises an array of recessed and protruding elements with a maximum variation in height between 10 μm and 100 μm.

11. 11. Arrangement according to any one of claims 8 to 10, wherein the fixing device (10) is fixed through an adhesive included in the group comprising cyanoacrylates and silanes.

12. 12. Arrangement according to any one of claims 8 to 11, wherein electronic components are inserted into the fixing device (10) of the arrangement.

13. 13. Arrangement according to any one of claims 8 to 12, wherein the tire casing (100) of said arrangement is mounted on a wheel, preferably in an inflated state.

Citation Information

Patent Citations

  • Device for attaching an electronic member to a pneumatic tyre

    WO2018150141A1