Device for fixing electronic component to casing

Abstract

The invention relates to an electronic system (1000) comprising a component (10) and a holding device (510), said device (510) comprising:-a base (511),-a holding wall (512) extending from the base (511) up to an edge (513) and defining an open volume (520) housing the component (10); -said volume (520) having an opening (516) delimited by an edge (513); the member (10) comprises a housing (12) circumscribed inside a cylinder (17) having an axis of rotation (15); characterised in that the retaining wall (512) comprises a protruding element (550) located radially outside the free edge (513), extending a thickness (e) along the axis of rotation (15), the housing (12) comprising a groove (51) defining a second volume (52) capable of accommodating the protruding element (550) of the retaining wall (512).

Description

Technical Field

[0001] The present invention relates to a device for fixing an electronic component to a tire, the purpose of which is to transmit identification information about the tire or physical parameters of the tire, which are measured by the electronic component during the service life of the tire. Background Art

[0002] The development of electronic objects in tires has made it possible for tires to be connectable and connected, which has promoted the development of new services, thus, for example, optimizing the use of tires. However, these electronic components sometimes have thermally and mechanically vulnerable parts, which requires the insertion of the electronic components after the tire has been manufactured. Therefore, the practice of inserting a fixing device as an interface between the electronic component and the tire has emerged. These fixing devices are usually elastic so as not to cause excessive stress to the tire, can conform to the significant deformation that the tire undergoes during use, and can suppress the stress transmitted to the electronic component. One of the most commonly used designs of such a device is a patch, which has a substrate for fixing to the tire and is provided with a wall that self-closes and extends from the substrate to an opening. This wall is used to support or hold the electronic component in place within the device, and the electronic component is tightly mounted within the elastically deformed wall. Due to the elasticity of the material of the wall, the opening allows the electronic component to be inserted into and removed from the patch.

[0003] Document WO2018 / 150141A1 illustrates a patch of this nature. Although this patch specifically has a clamping system to limit the opening, it conforms in all aspects to a patch for fixing an electronic object to a tire. During the use of the tire fixed by this system, mechanical strength problems of the system including the patch and the electronic component sometimes occur. Especially under high driving speed conditions, due to the change in the radius of curvature at the moment when the angular sector of the tire where the patch is fixed enters or leaves the ground contact surface, the forces generated on the patch and the electronic component are quite large. This sometimes causes the fixed patch to deform to such an extent that the electronic component mounted within the patch at least partially disengages from the receiving cavity within the patch, which ultimately results in the ejection of the electronic component from the patch. This ejection of the electronic component, which is usually destructive to the electronic component, may also damage the structure of the tire due to the electronic component being thrown towards the tire wall (especially at high speeds).

[0004] The object of the following subject matter of the present invention is to solve the problem of the ejection of the electronic component from the fixed patch. These solutions should be both economical and reliable at the same time and should not have an adverse effect on the operation of the electronic component housed within the fixed patch. Summary of the Invention

[0005] The present invention relates to an electronic system, which includes an electronic component and a holding device for holding the electronic component and capable of being fixed to a wall of a tire, the holding device including:

[0006] · A base that can be fixed to the wall of the outer tire via its outer surface,

[0007] · A closed retaining wall that can hold the electronic component, extending from the base to a free edge and defining an open volume with the base;

[0008] · The volume that can accommodate at least a part of the electronic component, defined by the inner surface of the base and the inner surface of the retaining wall, the volume having an opening defined by the free edge of the retaining wall, the opening being deformable to insert the electronic component into the volume;

[0009] The electronic component includes a protective housing defining an outer surface that circumscribes the inside of a cylinder, the axis of rotation of the cylinder being perpendicular to the median plane of the outer surface of the base of the retaining means and the cylinder being defined by two parallel planes; characterized in that the retaining wall includes a protruding element that is located radially outside the free edge with respect to the axis of rotation and extends towards the volume of the retaining means to a certain thickness in the direction of the axis of rotation of the cylinder circumscribing the protective housing, the outer surface of the protective housing includes a continuous and closed groove that is located radially outside the projection of the free edge of the retaining wall on the outer surface in the direction of the axis of rotation of the cylinder circumscribing the protective housing and extends a certain axial distance, the groove defining a second volume that can accommodate the protruding element, the protruding element extending a certain radial distance with respect to the axis of rotation, the radial distance being included in the radial extent of the groove.

[0010] This holding device can solve the above-mentioned technical problems, because the radial extension of the retaining wall is equipped with a protruding element, so that the radial extension has a certain rigidity at the position of the protruding element, so that the deformation of the patch opening can be controlled in terms of energy, which means that the electronic component is not easy to pop out of the fixture. The protruding element is not located at the free edge, which also helps to retain the electronic component, because before the protruding element can be removed from the groove, the radial extension between the free edge of the retaining wall and the protruding element must be turned over. Therefore, the size of the radial extension also determines the size of the opening defined by the free edge, thereby forcing the electronic component to remain inside the open volume. The presence and size of the continuous groove on the protective shell of the electronic component also form a restricted activity area between the electronic component and the retaining device, thereby forcing the electronic component to remain inside the open volume of the fixture. However, the electronic component can still be removed using an external tool, which expands the opening of the retaining wall in advance by applying a uniform specific load to the entire free edge, thereby reducing the radial extension of the retaining wall and causing it to escape from the groove. It is not possible to apply such forces to the system during use of the tire, even at high speeds, because the tool is not in the tire and because of the nature of the external forces applied to the system at the moment of impact when the angular sector of the tire to which the electronic system is fixed enters the contact patch, the external forces cannot be evenly distributed over the entire free edge of the retaining wall.

[0011] Preferably, the projecting element of the retaining wall of the retaining device is annular about the axis of rotation and extends angularly over the entire projection of the free edge onto the outer surface.

[0012] In order to take advantage of the mechanical anchoring provided by the continuous groove, the protruding element preferably covers angularly around the rotation axis of the electronic component to ensure the positioning of the electronic component in the holding device. The angular coverage of the protruding element can be discontinuous, i.e. the protruding element consists of a plurality of interrupted pads at the same radial distance from the rotation axis.

[0013] Very preferably, the cross section of the recess of the protective housing of the electronic component matches the cross section of the protruding element of the holding device.

[0014] Through the synergy between the cross-sectional shapes of the recess and the protruding element, the contact surface area between the two elements is optimized, thereby increasing the total contact force that the most elastic element (ie the protruding element) can exert at the same degree of deformation.

[0015] Advantageously, the cross section of the protruding element is one of the following shapes: semicircular, semi-elliptical, quadrilateral.

[0016] The advantage of these shapes is that they provide a non-linear contact force, which can provide a contact force gradient to ensure better mechanical retention of the electronic component in the retention device. Specifically, compared with geometries that provide a linear variation (such as a triangle), the retention walls are less likely to deform. In addition, these raised shapes enable the cost-effective manufacture of the protruding elements on the retention device and the grooves on the protective housing, and these shapes can be obtained by, for example, molding.

[0017] In a specific embodiment, the electronic component includes the following elements:

[0018] · A radio transmitter / receiver, which is connected to at least one radio antenna;

[0019] · A microprocessor, which is located on a printed circuit, connected to the radio transmitter / receiver and powered by an energy source,

[0020] The elements are encapsulated in a protective housing.

[0021] In this case, the electronic component includes a radio frequency transponder, that is, a radio frequency communication component capable of transmitting / receiving in order to pick up instructions and respond to the instructions. Here, the radio frequency transponder is active, that is, it includes an energy source, mainly used to transmit responses through radio frequency communication. This is because radio frequency transmission is an energy-consuming function for large-content responses such as transmitting measurement data, and the operations and calculations performed in the microprocessor may also require energy. For the computing function, the microprocessor has rather complex computing capabilities to process measurement data from measurement sensors (such as measurement sensors connected to the microprocessor). It should be noted that the energy source (which can be a battery, for example) may not only be bulky but also heavy, and if the electronic component accidentally pops out of the fixing device, it will cause significant centrifugal and impact forces, and these forces are not negligible.

[0022] According to a specific embodiment, the distance of the groove is greater than half of the thickness of the protruding element, and preferably the distance is greater than the thickness of the protruding element.

[0023] Preferably, the distance that the groove extends along the direction of the rotation axis of the cylinder circumscribing the protective housing is the same as the thickness of the protruding element along this direction.

[0024] Specifically, due to the geographical proximity of the groove and the protruding element, the groove first contacts the protruding element and can accommodate the protruding element within the second volume. Therefore, a strong interaction will occur between these two initially non - contacting elements, which will enhance the overall mechanical strength. Of course, the larger the contact surface area between the two elements, the greater the force generated by the contact when the same degree of deformation is applied. Therefore, a greater deformation energy is required for the electronic component to pop out from the holding device. If the axial distance of the groove is at least half of the thickness of the protruding element, the mechanical anchoring generated by the interaction between the two components is sufficient to hold the electronic component within the holding device. When the depth of the groove is greater than the thickness of the protruding element, the protruding element will not be squeezed, and the axial volume of the groove is sufficient to accommodate the protruding element without subjecting it to pressure, thereby enhancing the mechanical holding force of the protruding element. The ideal intermediate situation is that the axial distance of the groove is consistent with the thickness of the protruding element. This is because the mechanical anchoring between the two components is the greatest over the entire thickness of the protruding element, while the pre - load of the protruding element is minimized.

[0025] The mechanical movement limitation between the protruding element and the groove is controlled by the depth of the groove. The greater the depth, the greater the mechanical anchoring force of the retaining wall in the groove of the electronic component. The mechanical strength of this anchoring has a threshold, which is controlled by the thickness of the protruding element present in the groove along the direction of the rotational axis of the cylinder circumscribing the protective housing. Ensuring that the groove depth is at least half of the thickness of the protruding element provides additional deformation energy for removing the electronic component, which is sufficient to enhance the mechanical strength of the electronic system.

[0026] According to a preferred embodiment, the protruding element of the retaining wall of the holding device is continuous and closed.

[0027] The groove being continuous and annular means that the contact surface area between the protruding element and the groove increases, and the size of the protruding element matches the curved length of the groove. This continuous shape of the protruding element enhances the mechanical anchoring between the protruding element and the groove by increasing the contact surface area between them and distributing the deformation energy over a larger surface area, while still ensuring that the stress is continuous. This ensures better mechanical holding of the protruding element, and this promotes high - speed operation and enables the extension of the service life of the electronic system before the electronic component pops out from the holding device due to local fracture of part of the protruding element, which may occur if the protruding element is segmented and discontinuous. In addition, the axial symmetry of the protruding element means that the electronic system can be freely positioned within an object such as a tire without the risk of the electronic component being ejected.

[0028] The invention also relates to an arrangement of an electronic system and an outer tire capable of rotating about a rotation axis, the outer tire comprising a crown (S) and two sidewalls (F) extending from the crown (S) and terminating at two beads (B) capable of being connected to a wheel, wherein the electronic system is fixed to one of the surfaces of the outer tire by means of the outer surface of the base of the holding means, preferably to the radially inner surface of the outer tire.

[0029] Advantageously, the electronic system is fixed to the radially inner surface of the outer tire, and the axial position of the electronic system is included in the axial extent of the crown (S) of the outer tire.

[0030] This arrangement is the ultimate aim of the electronic system which forms the first subject of the invention. Since the electronic system comprises electronic components, these electronic components cannot be mounted on the outer tire at the green tire stage. This is because the electronic components cannot withstand the thermal and mechanical stresses associated with the outer tire manufacturing method. It is generally best to install the electronic system after the tire has been manufactured. Thus, the electronic system is positioned on one of the surfaces of the outer tire, which is essentially the outer surface. Preferably, the electronic system is positioned on the radially inner surface of the outer tire with respect to the natural rotation axis of the outer tire. Thus, when used on an outer tire, the electronic components are protected by the rubber structure of the outer tire, thereby improving the mechanical durability of the electronic components. Positioning it in alignment with the crown facilitates access to the measurement characteristics measured by the sensors of the electronic components associated with the ground contact surface, thereby enabling feedback of tire usage characteristics such as the static load applied, the traveling speed, etc.

[0031] Preferably, when the outer tire is capable of rotating about the rotation axis in the main direction (which corresponds to the traveling direction of a vehicle equipped with said arrangement relative to the ground when moving forward), when the electronic system is completely within the angular sector of the outer tire in contact with the ground, the centroid of the point of the protruding element of the holding wall of the holding means in the axial plane is positioned behind the rotation axis of the cylinder circumscribing the protective housing of the electronic component in the traveling direction of the vehicle.

[0032] When the tire is used for forward travel, the tire may be at a very high traveling speed. Positioning the protruding element of the holding wall relative to the rotation axis of the cylinder circumscribing the protective housing ensures that contact between the protruding element and the groove will occur immediately upon entering the ground contact surface, regardless of the shape or positioning of the protruding element. Thus, the reaction force exerted by this contact will prevent the electronic component from popping out of the holding means. Therefore, when the system is positioned in alignment with the crown (S) of the outer tire, the orientation of the electronic system in the outer tire is a factor influencing that the electronic component does not pop out, especially in the case of very high speeds. When the vehicle is moving forward in the forward gear, the vehicle travels at high and ultra-high speeds.

[0033] As used herein, "rear" means that the two points are spaced apart by a distance d in the said direction, and this distance d can be zero.

[0034] Very preferably, the median plane of the protruding element divides the angular sector of the protruding element into two equal angular sectors in a cylindrical reference system associated with the cylinder of the protective housing of the external electronic component, and the normal of the median plane has a main component along the rotation axis of the outer tire, preferably the normal is collinear with the rotation axis of the outer tire.

[0035] To ensure that the contemplated technical solution for holding the electronic component in the holding device is effective under all types of usage conditions on the vehicle, especially when the outer tire is mounted on the steering axle of the vehicle, the protruding element is preferably arranged centered in terms of angle so that contact can be achieved well both during straight driving and when turning right or left. Description of the Drawings

[0036] The present invention will be better understood after reading the following description given by way of non-limiting example only and with reference to the drawings, in which the same reference numerals denote the same parts, and in which:

[0037] · Figure 1 A perspective view of an electronic component that can be fixed to a tire via a holding device in the prior art is depicted;

[0038] · Figure 2 A cross-sectional view in the radial plane of an electronic system according to the present invention is depicted;

[0039] · Figure 3 A view of the electronic system according to the present invention as observed from above, i.e., from the same side as the opening of the cavity of the holding device, is depicted;

[0040] · Figure 4 A cross-sectional perspective view of an outer tire equipped with an electronic system according to the present invention is depicted. Detailed Description

[0041] Figure 1 A perspective view of the electronic component 10 of the prior art that can be fixed to the outer tire using the holding device.

[0042] The electronic component 10 depicted here in grey is bounded by a protective housing 12 that encapsulates all the electronic components of the electronic component 10. The protective housing 12 has an outer surface 30 circumscribed by a cylinder 17 that has a rotation axis 15 perpendicular to the printed circuit of the electronic component 10. The cylinder 17 having the rotation axis 15 is truncated by two parallel planes 16 and 16' that are located on the axial outer surfaces 14 and 14' of the protective housing 12 respectively.

[0043] The protective housing 12 has a combined form of a cone and a parallelepiped. The conical shape makes it easier to insert into or remove from the holding device. The cone has a parallelepiped for arranging a radio antenna on one of its axial outer surfaces. The radio antenna is encapsulated in the protective housing 12. The protective housing 12 is a monolithic component or a component assembled from multiple constituent components, which are subsequently welded together.

[0044] For example, the constituent components or the monolithic component are obtained from a plastic material (such as a thermosetting plastic) using a molding method. The low-temperature curing of the plastic completes the production of the outer surface 30 of the protective housing 12.

[0045] Figure 2 It is a sectional view in the radial plane of the electronic system 1000 according to the present invention.

[0046] The electronic system 1000 consists of an electronic component 10 and a holding device 510, which is intended to be fixed to the wall of an outer tire.

[0047] The holding device 510 includes a base 511 capable of being fixed to the wall of the outer tire via its outer surface and a closed holding wall 512, the purpose of the holding wall 512 being to hold the electronic component 10. The holding wall 512 extends from the base 511 to a free edge 513 and thus defines a volume 520 with the base 511. In this case, a protruding element 550 is provided on the holding wall 512 in the direction of the volume 520. This element 550 has an annular shape (continuous and closed in this case) around a rotation axis 15 and has a semi-circular cross-section. The height of the protruding element 550 in the direction of the axis 15 is denoted as "e". The volume 520 is open to allow the insertion and removal of the electronic component 10 into and from the volume 520. The volume 520 is defined by the inner surface 515 of the holding wall 512 and the inner surface 514 of the base 511. The opening 516 of the volume 520 is bounded by the free edge 513 of the holding wall 512. This opening 516 can be deformed to allow the insertion and removal of the electronic component 10 into and from the volume 520.

[0048] As Figure 1 , the electronic component 10 includes a protective housing 12 encapsulating all the electronic components. The protective housing 12 defines an outer surface 30. The outer surface 30 circumscribes the inside of a cylinder, the rotation axis 15 of the cylinder being perpendicular to the median plane of the outer surface of the base 511. The circumscribing cylinder is truncated by two parallel planes, the first plane belonging to the inner surface 514 of the base 511 and the second plane being axially outside the opening 516 of the holding device 510.

[0049] The retaining wall 512 extends axially from the base 511 up to the free edge 513. The portion of the retaining wall 512 including the free edge 513 has a mainly radial rather than axial extension, thus forming a retaining lip for retaining the electronic component 10. One of the ends of the lip is the free edge 513. The other end 530 is a closing line, and the points of the closing line have a vector tangent to the retaining wall 512, and this vector has a main component starting from the base 511 along the radial direction with respect to the rotation axis 15. The radial extension of the lip thus formed: extends from the closing line 530 up to the free edge 513, includes the protruding element 550 and helps to retain the electronic component 10 within the retaining device during high-speed travel when the system 1000 is fixed to the wall of the outer tire. Specifically, the protruding elements 550, which are continuous or discontinuous and extend angularly over the entire free edge 513 of the retaining wall, mean that more energy is required to deform the lip, which helps to retain the electronic component 10 within the retaining device 510. However, the application of a continuous and well-directed force allows the lip to open, so that the electronic component 10 can be removed from and inserted into the retaining device 510. In particular, this force needs to be uniform over the entire free edge 513, which does not occur naturally during travel when the angular sector of the outer tire carrying the electronic system enters or leaves the ground contact surface.

[0050] Specifically, in this case, the protective housing 12 has a cliff 50 that extends outside the volume 520 of the retaining device 510. The cliff 50 has a main component extending in the direction of the rotation axis 15.

[0051] The outer surface 30 of the protective housing 12 has a groove 51 at the protruding element 550. The groove 51 defines an annular recess with a semi-circular cross-section around the rotation axis 15, and this annular recess extends radially by a distance r R greater than the radial extension r of the protruding element 550 S . Furthermore, the distance by which the groove 51 extends axially is denoted as "e'", and this distance is greater than half of the thickness "e" of the protruding element 550. This defines a second volume 52 that can accommodate the protruding element 550.

[0052] The combination of the dimensions of the lip defined by the retaining wall 512 (whose free edge 513 is provided with the protruding element 550) and the dimensions of the groove 51 that coincides with the protruding element 550 ensures that when the electronic system 1000 is installed on the tire of a motor vehicle, the electronic component 10 does not accidentally pop out of the retaining device 510 during normal use at high speed.

[0053] Figure 3 For Figure 2View of the electronic system 1000 from above. This means that, from the outside of the electronic system 1000, the electronic system 1000 can be observed axially from the same side as the volume opening of the holding device 510.

[0054] Starting from the radial periphery of the electronic system 1000, the first thing that can be seen is the axial outer edge of the base 511, which is circular in this case, although the outer edge of the base 511 can also be elliptical or quadrilateral. Next, the first circle 529 can be seen, which corresponds to the demarcation between the base 511 and the holding wall 512, and is characterized by a change in curvature. The mass point on this circle 529 has a vector tangent to the base 511, and the main component of this vector changes from being originally radial starting from the base 511 to being axial. Next, the circle 530 corresponding to the closed line of the holding wall 512 can be seen, and this circle represents one end of the annular lip of the holding wall 512. This lip terminates at the second circle 513, and the second circle 513 represents the free edge of the holding wall 512. Next, between the circle 530 and the circle 513, there is a first circle 17 drawn in dotted line, and the first circle 17 corresponds to the radial outer surface of the circle of the outer surface of the protective housing 12 of the external electronic component 10. Then, four circles 551 to 554 in the form of dotted lines are arranged inwardly towards the electronic component 10. The circles 551 and 554 radially define the continuous and closed groove 51. The circles 552 and 553 define the protruding element 550, and the protruding element 550 axially extends beyond the lip.

[0055] Through the opening defined by the circle 513, the circle 53 can be seen here, and the circle 53 defines the axial end of the cliff 50 of the protective housing 12 of the electronic component 10. Therefore, this cliff 50 is mainly axial. The protruding element 550 defined by the circles 552 and 553 is annular and continuous. Here, the angular extension of the protruding element is divided into two 180-degree angular sectors by the median plane 55, and the normal of this median plane is collinear with the vector V. For the sake of understanding, this view from above is limited to the axial planes U and V, and the normal of this axial plane corresponds to the rotation axis of the circumscribed cylinder 17. Once the electronic system 1000 has been fixed to the wall of the outer tire, Figure 3 the local vector U of the electronic system should preferably correspond to the direction vector of the circumferential direction of the cylindrical reference system associated with the tire around its natural rotation axis. Therefore, once installed on the vehicle, when the tire is traveling along the road and the vehicle is in the forward gear to move forward, the centroid of the point of the protruding element 550 of the holding wall 512 in the axial plane is at the level of the rotation axis of the electronic system 1000 and is therefore behind the rotation axis of the electronic system 1000. This thus ensures a more effective holding of the electronic component 10 within the holding device 510.

[0056] Figure 4Figure 1 shows a cross-section of a pneumatic tire 100 according to the invention, which is also a tire cover and includes a crown S extending from two sidewalls F and terminating at two beads B. In this case, the tire 100 is intended to be mounted on a wheel (not shown in this figure), at the two beads B. Thus, a closed cavity containing at least one pressurized fluid is defined, which is defined by both the 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 of the pneumatic tire 100.

[0057] The axis corresponding to the reference axis or natural rotation axis of the pneumatic tire 100 and the median plane 211 will be denoted as reference axis 201, the median plane 211 being perpendicular to the reference axis 201 and equidistant from the two beads B. The intersection of the reference axis 201 and the median plane 211 determines the center of the pneumatic tire 100. A Cartesian reference system is defined at the center of the pneumatic tire 100, consisting of the reference axis 201, a vertical axis 203 perpendicular to the ground, and a longitudinal axis 202 perpendicular to the other two axes. In addition, a plane passing through the reference axis 201 and the longitudinal axis 202, parallel to the ground and perpendicular to the median plane 211, will be defined as the axial plane 212. Finally, a plane perpendicular to the median plane 211 and the axial plane 212 and passing through the vertical axis 203 will be called the vertical plane 213.

[0058] Any point mass of the pneumatic tire 100 is uniquely defined by its cylindrical coordinates (Y, R, θ). The scalar Y represents the axial distance from the center of the pneumatic tire 100 in the direction of the reference axis 201, which is defined by the orthogonal projection of the point mass of the tire 100 onto the reference axis 201. A plane making an angle θ with the vertical plane 213 about the reference axis 201 will be defined as the radial plane 214. In this radial plane 214, the point mass of the pneumatic tire 100 is referenced by the distance R from the center of the pneumatic tire 200 in a direction perpendicular to the reference axis 201, which is determined by the orthogonal projection of this point mass onto the radial axis 204. The unit vector perpendicular to the radial plane 214 represents the circumferential direction of the tire cover 100, and this unit vector forms a right-handed coordinate system (direct trihedron) with the unit vectors of the axial direction 201 and the radial direction 204. It should be noted that Figure 4 including an arrow 300 assigned to the longitudinal axis 202, the arrow 300 indicating the direction of travel of the pneumatic tire 100 when the pneumatic tire 100 is mounted on a vehicle and the vehicle is moving forward.

[0059] The pneumatic tire 100 has a retaining device 510 on its radially inner surface 130. When the retaining device 510 is made of an elastic material, the retaining device 510 is fixed to the surface 130 by adhesive bonding according to the usual prior art. The retaining device 510 is fixed to be aligned with the crown S of the outer tire 100, which improves its durability because the retaining device 510 positioned in this way is less affected during the operations of mounting the outer tire 100 on a wheel or removing it from the wheel. Specifically, the retaining device 510 is located in a region away from the bead B of the outer tire 100. In this case, the retaining device 510 is equipped with an electronic component 10 in its open volume, and this volume constitutes a housing designed to accommodate the electronic component 10. Thus, in this case, the outer tire 100 is ready to be mounted on a wheel, thereby forming a wheel-tire assembly. The electronic component 10 can provide various functions, such as identifying certain components, such as the electronic component itself, the tire. However, the electronic component can also be equipped with a pressure sensor and / or a temperature sensor to evaluate the inflation pressure of the wheel-tire assembly. Finally, it can also be equipped with sensors that directly measure the curvature of the outer tire, such as an accelerometer or a deflectometer, so that common variables of the tire, such as angular velocity, travel distance, and static load applied, can be derived. All these variables can identify the performance quality of the outer tire, such as its wear, grip, or the intrinsic variables of the ground on which the outer tire travels.

[0060] In Figure 4 the specific case, the electronic components of the electronic component 10 are encapsulated in a protective housing. The protective housing has an annular groove that extends under the protruding element of the retaining device 510. In this case, the protruding element is discontinuous and is in the form of a single protruding pad that presents a 120-degree angular sector around the axis of rotation. The angular orientation of the electronic system 1000 aims, on the one hand, to position the said pad in such a way that it first enters the ground plane, i.e., the centroid of the point of the protruding element in the radial plane is located behind the axis of rotation of the electronic component 10. On the other hand, the median plane of the pad is positioned in the circumferential direction of the tire to optimize the contact that occurs between the groove and the pad when the vehicle turns right or left.

Claims

1. An electronic system (1000) comprising an electronic component (10) and a holding device (510) for holding the electronic component (10) and capable of being fixed to the wall of a tire, the holding device (510) comprising: - a base (511) capable of being fixed to the wall of the tire via an outer surface, - a closed holding wall (512) capable of holding the electronic component (10), extending from the base (511) up to a free edge (513) and defining an open volume (520) with the base (511), - the volume (520) capable of receiving at least a portion of the electronic component (10), defined by an inner surface (514) of the base (511) and an inner surface (515) of the holding wall (512), and the volume (520) having an opening (516) defined by the free edge (513) of the holding wall (512), the opening being deformable to insert the electronic component (10) into the volume (520); The electronic component (10) comprises a protective housing (12) defining an outer surface (30), the outer surface being circumscribed inside a cylinder (17), the axis of rotation (15) of which is perpendicular to the median plane of the outer surface of the base (511) of the holding device (510), and the cylinder being delimited by two parallel planes (16, 16'); It is characterized in that the holding wall (512) includes a protruding element (550), the protruding element is located radially outside the free edge (513) with respect to the rotation axis (15) and extends a thickness (e) in the direction of the rotation axis (15) of the cylinder (17) of the circumscribed protective housing (12) towards the volume (520) of the holding device (510). The outer surface (30) of the protective housing (12) includes a continuous and closed groove (51), the groove (51) is located radially outside the projection (517) of the free edge (513) of the holding wall (512) on the outer surface (30) in the direction of the rotation axis (15) of the cylinder (17) of the circumscribed protective housing (12) and extends an axial distance (e’). The groove (51) defines a second volume (52), the second volume (52) can accommodate the protruding element (550), and the protruding element (550) extends a radial distance (r S ) with respect to the rotation axis (15), and this radial distance (r S ) is included in the radial range (r R ) of the groove (51).

2. The electronic system (1000) according to claim 1, wherein, The projecting element (550) of the holding wall (512) of the holding device (510) is annular around the axis of rotation (15) and extends angularly over the entire projection (517) of the free edge (513) on the outer surface (30).

3. The electronic system (1000) according to any one of claims 1 and 2, wherein, The cross-section of the groove (51) of the protective housing (12) of the electronic component (10) matches the cross-section of the projecting element (550) of the holding device (510).

4. The electronic system (1000) according to any one of claims 1 to 3, wherein, The cross-section of the projecting element (550) is one of the following shapes: semi-circular, semi-elliptical, quadrilateral.

5. The electronic system (1000) according to any one of claims 1 to 4, wherein, The electronic component (10) comprises the following elements: - a radio transmitter / receiver connected to at least one radio antenna; - a microprocessor located on a printed circuit, connected to the radio transmitter / receiver and powered by an energy source, The elements are encapsulated in the protective housing (12).

6. The electronic system (1000) according to any one of claims 1 to 5, wherein, The distance (e') of the groove (51) is greater than half of the thickness (e) of the projecting element (550), preferably the distance (e') is greater than the thickness (e) of the projecting element (550).

7. The electronic system (1000) according to claim 6, wherein, The distance (e') along which the groove (51) extends in the direction of the axis of rotation (15) of the cylinder (17) circumscribing the protective housing (12) is the same as the thickness (e) of the projecting element (550) in this direction.

8. The electronic system (1000) according to any one of claims 2 to 7, wherein, The projecting element (550) of the holding wall (512) of the holding device (510) is continuous and closed.

9. Arrangement of an electronic system (1000) and a pneumatic tyre (100) capable of rotating about a rotation axis (201) according to any one of claims 1 to 8, said pneumatic tyre (100) comprising a crown (S), two sidewalls (F) extending from the crown (S) and ending at two beads (B) capable of being connected to a wheel, wherein, The electronic system (1000) is fixed to one of the surfaces (130, 140) of the tire (100) via the outer surface of the base (511) of the holding device (510), preferably to the radially inner surface (130) of the tire (100).

10. The arrangement according to claim 9, wherein, The electronic system (1000) is fixed to the radial inner surface (130) of the outer tire (100), and the axial position of the electronic system is included in the axial range of the crown (S) of the outer tire (100).

11. The arrangement according to claim 10, wherein, In the case where the outer tire (100) can rotate about the rotation axis (201) in the main direction corresponding to the traveling direction (300) of the vehicle equipped with the arrangement relative to the ground, when the electronic system (1000) is completely in the angular sector where the outer tire (100) is in contact with the ground, the centroid of the point of the protruding element (550) of the retaining wall (512) of the retaining means (510) is positioned behind the rotation axis (15) of the cylinder (17) of the protective housing (12) of the external electronic component (10) in the traveling direction (300) of the vehicle.

12. The arrangement according to claim 11, wherein, The median plane of the protruding element (550) divides the angular sector of the protruding element (550) into two equal angular sectors in the cylindrical reference system associated with the cylinder (17) of the protective housing (12) of the external electronic component (10), and the normal of the median plane has a main component along the rotation axis (201) of the outer tire (100), preferably the normal is collinear with the rotation axis (201) of the outer tire (100).

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