Fixing device configured to secure electrical equipment to a wall.

Abstract

The present invention relates to a fixing device (1) configured to secure electrical equipment (2) to a wall (3), said fixing device (1) comprising: a wall plate intended to be secured to said wall (3), a counter-plate capable of supporting said electrical equipment, said counter-plate comprising at least one degree of mobility in translation in an elevation direction (Z) relative to said wall plate, and at least two magnets allowing reversible securing of said counter-plate to said wall plate. Abbreviated figure: figure 1

Description

Title of the invention: Fixing device configured to secure electrical equipment to a wall.

[0001] The present invention relates to a fixing device configured to secure electrical equipment to a wall.

[0002] Known fixing devices can, for example, make it possible to quickly and reversibly secure a camera to a wall by means of a magnet exerting an attractive magnetic force when this magnet is arranged opposite a metal support, such as a rack, or opposite a wall plate attached to the wall.

[0003] In order to dismantle or replace the camera, an operator must exert a tensile force perpendicular to the wall, which requires the use of a small magnet configured solely to hold the camera in position on the wall.

[0004] Furthermore, as described in document CN217928180U, fixing devices for electrical equipment, such as a smartphone, are also known, comprising a support plate provided with magnetic members and a sliding counter-plate also provided with magnetic members allowing reversible joining of the two plates.

[0005] In this case, two lateral tabs each slide in a vertical groove, thus mechanically preventing translational movements in two directions perpendicular to each other.

[0006] The present invention therefore aims to propose a fixing device of simple design making it possible to provide a degree of mobility in translation parallel to the wall, a secure fixing of electrical equipment on a wall and automatic detachment under certain predetermined conditions.

[0007] The invention thus relates to a fixing device configured to secure electrical equipment to a wall, the fixing device comprising: - a wall plate intended to be secured to the wall, - a counter-plate capable of supporting the electrical equipment, the counter-plate comprising at least one degree of mobility in translation in an elevation direction Z relative to the wall plate, - at least two magnets allowing reversible attachment of the counter plate to the wall plate.

[0008] This device is remarkable in that, on the one hand, said at least two magnets comprise: - at least one holding magnet arranged on an internal face of the counter- plate, - at least one upper guide magnet arranged on the internal face and close to a first edge of the counter-plate, said at least one upper guide magnet being configured to participate in guiding the counter-plate in translation in the elevation direction Z relative to the wall plate between an intermediate position and a fixing position and vice versa,

[0009] and, on the other hand, in that the wall plate comprises a release recess capable of suppressing a magnetic attraction force generated by said at least one holding magnet when the counter-plate is arranged in the intermediate position, said at least one holding magnet being arranged opposite the release recess in a direction X perpendicular to the elevation direction Z.

[0010] In other words, the specific wall plate of the fixing device according to the invention makes it possible to provide the counter plate with freedom of movement in translation, in particular between two distinct positions. In the intermediate position, only one or more upper guide magnets make it possible to provide a magnetic attraction force.

[0011] However, the magnetic attraction force generated by the upper guide magnet(s) does not allow the counter plate to be held in position relative to the wall plate in the presence of the electrical equipment carried. This magnetic attraction force generated by the upper guide magnet(s) jointly may also be less than the magnetic attraction force generated by the holding magnet(s) jointly.

[0012] The expression “internal face” designates a face of the counter-plate intended to be arranged opposite the wall plate, as opposed to an external face intended to be arranged opposite an external environment.

[0013] The expression “in the vicinity of a first edge” means that the upper guide magnet(s) are positioned in a first zone of the counterplate separated from a second zone by a median plane of the counterplate perpendicular to the elevation direction Z.

[0014] The upper guide magnet(s) however participate in translational guidance and thus make it possible to avoid resorting to complex complementary shapes such as grooves or slots.

[0015] Furthermore, an operator can position the counterplate in its intermediate position and then support the counterplate and the electrical equipment.

[0016] Once the electrical equipment is connected, the operator moves the counter-plate in translation relative to the wall plate in the elevation direction Z to the fixing position in which the holding magnet(s) are opposite a magnetic material portion of the wall plate.

[0017] Conversely, to detach the electrical equipment from the wall, an operator can exert a tensile force to move the counter plate in translation relative to the wall plate from the fixing position to the intermediate position. Once the holding magnet(s) are opposite the unhooking recess, the magnetic attraction force generated by the holding magnet(s) is canceled and the magnetic attraction force generated by the upper guide magnet(s) no longer allows the degree of freedom in translation of the counter plate relative to the wall plate in the X direction to be eliminated.

[0018] The counter plate can then be tilted relative to the wall plate and arranged in a detached position.

[0019] Advantageously, the counter-plate may have a U-shape, the counter-plate comprising a central portion capable of supporting the electrical equipment and two parallel flaps cooperating with lateral fields of the wall plate, the two flaps participating in the translational guidance in the elevation direction Z of the counter-plate relative to the wall plate.

[0020] Such a U-shape in fact makes it possible to eliminate a degree of freedom in translation of the counter-plate relative to the wall plate in another direction Y perpendicular to the directions X and Z, this direction Y being perpendicular to two planes in which the two flaps are respectively inscribed.

[0021] In practice, said at least two magnets may comprise at least one lower guide magnet arranged on the internal face and close to a second edge of the counter-plate, the second edge being opposite the first edge in the elevation direction Z, said at least one lower guide magnet being configured to participate in the translational guidance of the counter-plate in the elevation direction Z relative to the wall plate, said at least one lower guide magnet being separate from said at least one holding magnet and said at least one upper guide magnet.

[0022] In other words, the lower guide magnet(s) can participate, together with the upper guide magnet(s), in the suppression of the degree of freedom in translation of the counter-plate relative to the wall plate in the first substantially horizontal direction.

[0023] The expression “in the vicinity of a second edge” means that the lower guide magnet(s) are positioned in the second zone of the counterplate and not in the first zone comprising the upper guide magnet(s).

[0024] Furthermore, once the counter plate is in the intermediate position, the lower guide magnet(s) are no longer opposite the wall plate. The magnetic attraction force generated by the lower guide magnet(s) is cancelled out and no longer allows to remove the degree of freedom in translation of the counter plate relative to the wall plate in the X direction. In the intermediate position, the counter plate can then be detached from the wall plate automatically under the effect of gravitational force in the presence of electrical equipment.

[0025] Furthermore, said at least two magnets may have different shapes or sizes allowing their magnetic attraction force to be adapted. For example, the holding magnet(s) may have a first cylindrical shape with a circular base having a first diameter.

[0026] The lower guide magnet(s) and the upper guide magnet(s) may have a second cylindrical shape with a circular base having a second diameter smaller than the first diameter.

[0027] These magnets can be formed in particular with alloys based on Iron, Cobalt or Nickel or even with an alloy of Neodymium, Iron and Boron.

[0028] Furthermore, several embodiments can be envisaged for producing the wall plate.

[0029] In practice, the wall plate may either be formed from a magnetic material or coated with an outer layer formed from a magnetic material.

[0030] In the first case, the wall plate is monolithic and can, for example, be obtained by a machining process, hot or cold forming, or even by molding.

[0031] Such a magnetic material may in particular be chosen from the group comprising ferrous metals, iron, iron alloys, steels and iron oxides.

[0032] In the second case, the wall plate may be coated with an outer layer formed from a magnetic material.

[0033] In this second example, the external layer can be attached to a rigid support, for example by gluing, and can at least partially cover areas of this rigid support intended to face the magnets arranged on the internal face of the counterplate.

[0034] Thus, only this external layer can in particular be chosen from the group comprising ferrous metals, iron, iron alloys, steels and iron oxides.

[0035] Furthermore, said at least one holding magnet may be dimensioned to hold the counter plate in the fixing position as long as a force applied downwards in the elevation direction Z on the counter plate is less than a predetermined threshold, the predetermined threshold being between 100 N (Newton) and 1000 N (Newton), the counter plate moving from the fixing position to the intermediate position when the applied force is greater than the predetermined threshold.

[0036] Thus, the magnetic force generated by the holding magnet(s) may be such that the force required to move the counter plate from the fixing position is greater than or equal to, for example, 400 N (newton). The counter plate may be held in position in its fixing position by the holding magnet(s) unless, for example, a mass greater than or equal to 40 kg (kilogram) is suspended from the electrical equipment. A tensile force in the Z elevation direction is then transmitted to the counterplate. Such a mass allowing the counterplate to be moved in translation in the Z elevation direction downwards can thus correspond to the mass of a natural person. The invention then makes it possible to prevent an individual from clinging to the system.

[0037] Consequently, the predetermined threshold of the force applied in an elevation direction may be, for example, equal to 400 N.

[0038] Furthermore, as long as the predetermined threshold is not exceeded, the magnetic attraction force generated by said at least one holding magnet thus makes it possible to eliminate at least two degrees of freedom in translation of the counter-plate relative to the wall plate in the elevation direction Z and in the direction X.

[0039] When the predetermined threshold is exceeded, the magnetic attraction force generated simultaneously by the holding magnet(s) and the upper guide magnet(s) no longer allows the degree of freedom in translation of the counter-plate relative to the wall plate to be removed in the elevation direction Z but still removes the degree of freedom in the X direction. The counter-plate then moves in translation in the elevation direction Z towards the intermediate position.

[0040] Once the holding magnet(s) are opposite the unhooking recess, the magnetic attraction force generated by the holding magnet(s) is cancelled out and the magnetic attraction force generated by the upper guide magnet(s) no longer allows the degree of freedom in translation of the counter-plate relative to the wall plate in the X direction to be eliminated.

[0041] Such an arrangement may in particular be of interest for applications in a prison environment. Indeed, the holding magnet(s) may be sized to generate an attractive magnetic force intended to prevent a person from using the electrical equipment to hoist themselves onto a wall, or even to climb a wall and escape or enter a closed enclosure such as a prison.

[0042] Advantageously, the wall plate may comprise a protective channel capable of accommodating an electrical cable connected to the electrical equipment, the protective channel opening onto, on the one hand, the unhooking recess and, on the other hand, an environment external to the wall plate.

[0043] Such a protective channel can thus extend in a rectilinear manner and cause the unhooking recess to open into the external environment. This protective channel can, for example, be produced by a process of stamping a sheet metal forming a flat part of the wall plate intended to come into contact with the wall.

[0044] Alternatively, the protective channel may form a strip having a profile U-shaped. In this case, the protection channel can be attached and secured to a sheet forming a flat part of the wall plate.

[0045] An electrical cable can then be positioned in the protective channel and prevents the counter plate from touching it when this counter plate is placed or removed from the wall plate by tilting and / or sliding.

[0046] In practice, the protection channel may extend outside a lateral field of the wall plate.

[0047] In other words, the protective channel can protrude from the general shape of the wall plate and form a protrusion. Such an arrangement thus makes it possible to protect the electrical cable even when the counter plate is tilted and detached from the wall plate.

[0048] According to an advantageous example, said at least one upper guide magnet may comprise a first upper guide magnet and a second upper guide magnet, said at least one holding magnet being arranged between the first upper guide magnet and the second upper guide magnet.

[0049] In other words, the first upper guide magnet and the second upper guide magnet may be arranged symmetrically on either side of the holding magnet(s). In addition, the counterplate may also comprise another median plane perpendicular to the Y direction, the first upper guide magnet and the second upper guide magnet being arranged symmetrically on either side of this median plane perpendicular to the Y direction to balance the magnetic attraction force generated by all of the guide magnets.

[0050] In practice, said at least one holding magnet may comprise a first holding magnet and a second holding magnet juxtaposed next to each other.

[0051] As a result, the first holding magnet and the second holding magnet can be arranged symmetrically on either side of the median plane perpendicular to the Y direction of the counter plate to balance the magnetic attraction force generated by all of the holding magnets.

[0052] Advantageously, the detachment recess may have an elongated shape with a width greater than or equal to a transverse dimension occupied by the first holding magnet and the second holding magnet.

[0053] Thus, when the first holding magnet and second holding magnet are placed opposite the detachment recess, the first holding magnet and second holding magnet are at least partially inscribed in the elongated shape of the detachment recess. This elongated shape can further be arranged symmetrically on either side of another median plane perpendicular to the Y direction of the wall plate.

[0054] The invention and its advantages will appear in more detail in the context of the des-

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[0061] description which follows with examples of realization given for illustrative purposes with reference to the appended figures which represent: - [Fig.l], a perspective view of a fixing device according to the invention, - [Fig.2], an enlarged perspective view of the fixing device according to the [Fig.l], in accordance with the invention, - [Fig.3], a perspective view of a counterplate, in accordance with the invention, - [Fig.4], a perspective view of a wall plate, in accordance with the invention, - [Fig.5], a perspective view of the mounted fixing device, in accordance with the invention, - [Fig.6], a perspective view of the fixing device in progress disassembly, in accordance with the invention, and - [Fig.7], a perspective view of the dismantled fixing device, in accordance with the invention. Elements present in several distinct figures are assigned a single reference. Note that three directions X, Y and Z orthogonal to each other are shown in Figures 1 and 2. The direction X is said to be longitudinal insofar as it extends perpendicularly relative to a wall 3 on which the fixing device 1 is capable of being attached. The term “thickness” relates to a longitudinal dimension of the device in this longitudinal direction X. Another direction Y is called transverse and extends parallel to the wall 3 on which the fixing device 1 is intended to be attached. The term “width” relates to a transverse dimension of the fixing device 1 in this transverse direction. Finally, a third direction Z is called elevation and corresponds to the height dimensions of the structures described. The term “height” then relates to an elevation dimension of the fixing device 1 along this elevation direction Z. Furthermore, as shown in [Fig.l], the fixing device 1 makes it possible to secure electrical equipment 2 to a wall 3. Such electrical equipment can be chosen from the group comprising a camera, a loudspeaker, an antenna, a motion detector, a light fixture or a technical box. As shown in more detail in [Fig.2] without the electrical equipment 2, this fixing device 1 comprises a wall plate 4 intended to be secured to the wall 3. Fastening means, such as screws or studs and nuts for example, allow the wall plate 4 to be kept stationary relative to the wall 3.

[0062] The fixing device 1 also comprises a counter-plate 5 supporting the electrical equipment 2. Such a counter-plate 5 thus at least partially covers the wall plate 4 when the fixing device 1 is mounted on a wall 3.

[0063] As shown in [Fig.3], the fixing device 1 comprises at least two magnets 61, 62, 71-74 allowing reversible attachment of the counter-plate 5 to the wall plate 4.

[0064] More precisely, these at least two magnets comprise at least one holding magnet 61, 62 and at least one upper guide magnet 71, 72 arranged on an internal face 6 of the counter-plate 5.

[0065] Such holding magnet(s) 61, 62 and upper guide magnet(s) 71, 72 are furthermore arranged near a first edge 7 of the counter-plate 5. Such a first edge 7 of the counter-plate 5 can be defined as being an upper edge opposite a second edge 8 defined as being a lower edge in the elevation direction Z. The first edge 7 is thus arranged above the second edge 8 in the elevation direction Z.

[0066] Furthermore, this or these holding magnets 61, 62 are dimensioned to hold the counter-plate 5 in a fixing position PI, shown in [Fig.5], as long as a force F applied downwards in the elevation direction Z on the counter-plate 5 is less than a predetermined threshold. For example, as long as the applied force is less than the weight of a physical person.

[0067] On the other hand, if the force F applied to the counter-plate 5 is greater than the predetermined threshold, the counter-plate 5 then moves from the fixing position PI to an intermediate position P2 shown in [Fig.6].

[0068] Furthermore, translational guidance of the counter-plate 5 relative to the wall plate 4 is achieved by means of the upper guide magnet(s) 71, 72 sized to keep the counter-plate 5 parallel relative to the wall plate 4 during a movement from the fixing position PI to the intermediate position P2 and vice versa.

[0069] The upper guide magnet(s) 71, 72 are furthermore separate from the holding magnet(s) 61, 62 and may have different shapes to generate different magnetic attraction forces. The magnetic attraction force generated by the holding magnet(s) 61, 62 is, for example, chosen to be greater than the magnetic attraction force generated by the upper guide magnet(s) 71, 72.

[0070] As shown, these upper guide magnets 71, 72 even comprise actually a first upper guide magnet 71 and a second upper guide magnet 72 arranged on either side of a median plane Pmed perpendicular to the direction Y. Along the direction Y, the holding magnet(s) 61, 62 are then arranged between the first upper guide magnet 71 and the second upper guide magnet 72.

[0071] Similarly, the holding magnets 61, 62 may comprise a first holding magnet 61 and a second holding magnet 62 juxtaposed next to each other in the Y direction.

[0072] The first holding magnet 61 and the second holding magnet 62 and respectively the first upper guide magnet 71 and the second upper guide magnet 72 can advantageously be arranged symmetrically with respect to the median plane Pmed.

[0073] Furthermore, these at least two magnets may advantageously also comprise at least one lower guide magnet 73, 74 arranged on the internal face 6 of the counter-plate 5 and close to the lower edge 8 of this counter-plate 5.

[0074] Like the upper guide magnet(s) 71, 72, this or these lower guide magnet(s) 73, 74 are dimensioned to keep the counter plate 5 parallel with respect to the wall plate 4 during movement from the intermediate position P2 to the fixing position PI, and vice versa. This or these lower guide magnet(s) 73, 74 are furthermore separate from the holding magnet(s) 61, 62 and from the upper guide magnet(s) 71, 72.

[0075] The lower guide magnets 73, 74 may then comprise a first lower guide magnet 73 and a second lower guide magnet 74 arranged symmetrically with respect to the median plane Pmed. As shown in [Fig. 3], the inner face 6 of the counterplate 5 may have a quadrilateral shape with four corners. The first upper guide magnet 71, the second upper guide magnet 72, the first lower guide magnet 73 and the second lower guide magnet 74 may then be arranged respectively near the four corners of this inner face 6.

[0076] Thus, thanks to the different upper guide magnets 71, 72 and lower guide magnets 73, 74, the degree of mobility in the X direction can be eliminated between the counter plate 5 and the wall plate 4 between the intermediate position P2 and the fixing position PI, and vice versa.

[0077] The counter plate 5 then has a degree of mobility in translation in the elevation direction Z relative to the wall plate 4. The counter plate 5 is thus movable in translation relative to the wall plate 4 between the intermediate position P2 and the fixing position PL

[0078] To do this, the counter plate 5 may have a U shape. The counter plate 5 then comprises a central portion 9, possibly substantially flat, supporting the electrical equipment 2 and two parallel flaps 12, 13 cooperating with lateral fields 14, 15 of the wall plate 4 as shown in [Fig.4].

[0079] The two flaps 12, 13 thus make it possible to eliminate the degree of freedom in translation in the Y direction between the wall plate 4 and the counter-plate 5. The two flaps 12, 13 cooperating with the lateral fields 14, 15 then participate in the translational guidance in the elevation direction Z of the counter-plate 5 relative to the wall plate 4.

[0080] Such an arrangement is thus simple to implement, for example, by folding the counter-plate 5 and by using lateral fields 14, 15 that are plane and parallel to each other. Such a fixing device 1 then comprises parts of simple geometry and does not require the use of grooves or grooves of complementary shapes to eliminate the degrees of freedom in the X direction and the Y direction.

[0081] Furthermore, such a wall plate 4 comprises a release recess 10 capable of suppressing a magnetic attraction force generated by the holding magnet(s) 61, 62 when the counter-plate 5 is arranged in the intermediate position P2.

[0082] Furthermore, several embodiments can be envisaged for producing the wall plate 4.

[0083] According to a first exemplary embodiment, the wall plate 4 can be formed from a magnetic material.

[0084] According to this first example, the wall plate 4 is then monolithic and can for example be obtained by a machining process, hot or cold forming, or even by molding.

[0085] Such a magnetic material of the wall plate 4 may in particular be chosen from the group comprising ferrous metals, iron, iron alloys, steels and iron oxides.

[0086] According to a second exemplary embodiment, the wall plate 4 can be coated with an external layer formed from a magnetic material.

[0087] In this second example, the external layer can be attached to a rigid support, for example by gluing, and can at least partially cover areas of this rigid support intended to come opposite the magnets 61, 62, 71-74 arranged on the internal face 6 of the counter-plate 5.

[0088] Thus, only this external layer can in particular be chosen from the group comprising ferrous metals, iron, iron alloys, steels and iron oxides.

[0089] Such a detachment recess 10 may have an elongated, or even rectangular, shape, with a width greater than or equal to a transverse dimension along the direction Y occupied by the first holding magnet 61 and the second holding magnet. maintenance 62.

[0090] Thus, when the first holding magnet 61 and the second holding magnet 62 have a cylindrical shape with a circular base having respectively a first diameter and a second diameter, the width of the elongated shape forming the detachment recess 10 is greater than or equal to the sum of the first and second diameters.

[0091] In addition, the first upper guide magnet 71, the first holding magnet 61 and the second holding magnet 62 and the second upper guide magnet 72 may be advantageously aligned along the Y direction.

[0092] Furthermore, when the counter plate 5 is slid into the intermediate position P2 parallel to the wall plate 4, the magnetic attraction force generated by the first holding magnet 61 and the second holding magnet 62 is in fact suppressed due to the presence of the unhooking recess 10 arranged opposite. The counter plate 5 can thus be easily tilted to reach a unhooked position P3 shown in [Fig.7].

[0093] Furthermore, as shown in [Fig.4], the wall plate 4 may comprise a protective channel 16 capable of receiving an electrical cable intended to be connected to the electrical equipment 2. Such a protective channel 16 cooperates with, on the one hand, the release recess 10 and, on the other hand, an external medium EXT arranged outside an external volume delimiting the wall plate 4, as opposed to the release recess arranged inside this external volume delimiting the wall plate 4.

[0094] Such a protection channel 16 can thus extend parallel to the elevation direction Z outside a lateral field 17 of the wall plate 4.

[0095] Naturally, the present invention is subject to numerous variations as to its implementation. Although several embodiments have been described, it is understood that it is not conceivable to exhaustively identify all possible modes. It is of course conceivable to replace a means described by an equivalent means without departing from the scope of the present invention.

Claims

Claims

1. Fastening device (1) configured to secure electrical equipment (2) to a wall (3), said fastening device (1) comprising: - a wall plate (4) intended to be secured to said wall (3), - a counter plate (5) capable of supporting said electrical equipment, said counter plate (5) comprising at least one degree of mobility in translation in an elevation direction (Z) relative to said wall plate (4), and - at least two magnets (61, 62, 71-74) allowing reversible joining of said counter-plate (5) with said wall plate (4), characterized in that, on the one hand, said at least two magnets (61, 62, 71-74) comprise: - at least one holding magnet (61, 62) arranged on an internal face (6) of said counter-plate (5), - at least one upper guide magnet (71, 72) arranged on said internal face (6) and close to a first edge (7) of said counter-plate (5), said at least one upper guide magnet (71, 72) being configured to participate in guiding in translation of said counter-plate (5) in said elevation direction (Z) relative to said wall plate (4) between an intermediate position (P2) and a fixing position (PI) and vice versa, and, on the other hand, in that said wall plate (4) comprises a detachment recess (10) capable of suppressing a magnetic attraction force generated by said at least one holding magnet (61, 62) when said counter-plate (5) is arranged in said intermediate position (P2), said at least one holding magnet (61, 62) being arranged opposite said detachment recess (10) in a direction X perpendicular to said elevation direction Z.

2. A fixing device according to claim 1, characterized in that said counterplate (5) has a U shape, said counter-plate (5) comprising a central portion (9) capable of supporting said electrical equipment (2) and two parallel flaps (12, 13) cooperating with lateral fields (14, 15) of said wall plate (4), said two flaps (12, 13) participating in said translational guidance along said elevation direction (Z) of said counter-plate (5) relative to said wall plate (4).

3. Fixing device according to any one of claims 1 to 2, characterized in that said at least two magnets (61, 62, 71-74) comprise at least one lower guide magnet (73, 74) arranged on said internal face (6) and close to a second edge (8) of said counter-plate (5), said second edge (8) being opposite said first edge (7) in said elevation direction Z, said at least one lower guide magnet (73, 74) being configured to participate in said translational guidance of said counter-plate (5) in said elevation direction (Z) relative to said wall plate (4), said at least one lower guide magnet (73, 74) being separate from said at least one holding magnet (61, 62) and said at least one upper guide magnet (71, 72).

4. A fixing device according to any one of claims 1 to 3, characterized in that said wall plate (4) is either formed from a magnetic material or coated with an outer layer formed from a magnetic material.

5. Fixing device according to any one of claims 1 to 4, characterized in that said at least one holding magnet (61, 62) is dimensioned to hold said counter-plate (5) in said fixing position (PI) as long as a force (F) applied downwards in said elevation direction (Z) on said counter-plate (5) is less than a predetermined threshold, said predetermined threshold being between 100 N (Newton) and 1000 N (Newton), said counter-plate (5) moving from said fixing position (PI) to said intermediate position (P2) when said applied force (F) is greater than said predetermined threshold.

6. Fixing device according to any one of claims 1 to 5, characterized in that said wall plate (4) comprises a protective channel (16) capable of receiving an electrical cable connected to said electrical equipment (2), said protective channel (16) opening onto on the one hand said release recess (10) and on the other hand an external medium (EXT) to said wall plate (4).

7. Fixing device according to claim 6, characterized in that said protective channel (16) extends outside a lateral field (17) of said wall plate (4).

8. A fixing device according to any one of claims 1 to 7, characterized in that said at least one upper guide magnet (71, 72) comprises a first upper guide magnet (71) and a second upper guide magnet (72), said at least one holding magnet (61, 62) being arranged between said first upper guide magnet (71) and said second upper guide magnet (72).

9. Fixing device according to any one of claims 1 to 8, characterized in that said at least one holding magnet (61, 62) comprises a first holding magnet (61) and a second holding magnet (62) juxtaposed next to each other.

10. Fixing device according to claim 9, characterized in that said release recess (10) has an elongated shape of width greater than or equal to a transverse dimension occupied by said first holding magnet (61) and said second holding magnet (62).

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