Electromagnet for smart box intended to be positioned on two-wheeled vehicles.

Abstract

The invention relates to an electromagnet (1013) for a smart box intended to be positioned on a receiving base, said receiving base being adapted to receive said smart box, said receiving base being able to be secured to a two-wheeled vehicle, said electromagnet (1013) comprising a body (10131). The body of the electromagnet (1013) has a cylindrical shape of height H and body diameter D, said height H and said body diameter D being selected so that: . Figure for abstract: Fig. 9

Description

Title of the invention: Electromagnet for smart box intended to be positioned on a two-wheeled vehicle. Technical field

[0001] The present invention relates to the field of intelligent boxes for assisting users of two-wheeled vehicles, such as a bicycle. More particularly, the invention relates to easy mounting and dismounting of such a box on the bicycle. Previous Art

[0002] It is known to use smart boxes to secure two-wheel users. By "smart box" is meant a system adapted to provide services to a user, such as an anti-theft service, an alarm service in the event of the user falling off the bicycle, or any other service.

[0003] WO 01 / 56869 discloses an alarm system for use in a two-wheeled vehicle to prevent theft. This system comprises a base on which a vibration sensor, a microprocessor and means for generating a siren are mounted. A power supply consisting of two rechargeable batteries is connected to the base to power the vibration sensor, the microprocessor and the means for generating the siren. The alarm system is placed in the handlebar of the vehicle by removing the handle and inserting the entire system via the open end of the tubular handlebar.

[0004] Although this solution allows the user to be warned in the event of theft, it does not make it easier for the user to dismantle such a system if they wish to remove it from the bicycle.

[0005] There is therefore a need to propose a solution which provides flexible use of a smart box mounted on a two-wheeled vehicle, while facilitating its installation and removal by the user. Summary of the invention

[0006] An object of the invention relates to an electromagnet for a smart box intended to be positioned on a receiving base, said receiving base being adapted to receive said smart box, said receiving base being able to be secured to a two-wheeled vehicle, said electromagnet comprising:

[0007] - a body;

[0008] - a chamber internal to the body;

[0009] - a rod intended to slide in said chamber, said rod being able to take a locked position in which it exits, at least in part, from the chamber to come to be housed in a cavity of the receiving base, said rod being able to take an unlocked position in which it enters, at least in part, into the chamber which makes it come out of the cavity;

[0010] - a compression spring disposed in the chamber, said compression spring being adapted to act against the rod to maintain it in a locked position;

[0011] - a coil housed in the body, said coil being adapted to act on the rod in view to returning it to an unlocked position, when said coil is electrically powered,

[0012] The body of the electromagnet having a cylindrical shape of height H and diameter of body D, said height H and said diameter D being selected so that:

[0013] l,10 <f<l,20-

[0014] The electromagnet has the effect of acting on the rod in order to lock or unlock the smart box relative to the receiving base. By framing the parameters of height and diameter of the body of the electromagnet, the size of the smart box on the bicycle is limited.

[0015] In an alternative embodiment, the height H and the body diameter D are selected so that:

[0016] 1.13<§<1.17-

[0017] In an alternative embodiment, the height H is selected so that:

[0018] 10 mm < H £ 10.8 mm.

[0019] In an alternative embodiment, the body diameter D is selected so that:

[0020] 8.85 mm < D < 9.15 mm.

[0021] In an alternative embodiment, the rod having a first length L1 outside the chamber when it is in a locked position and a second non-zero length L2 when it is in an unlocked position, said first length L1 and said second length L2 are selected so that:

[0022] 2 < -H < 2.50- L2

[0023] In an alternative embodiment, the first length L1 and the second length L2 are selected so that:

[0024] 2.07 < g <2.33-

[0025] In an alternative embodiment, the first length L1 is selected so that:

[0026] 5.25 mm L1 5.75 mm.

[0027] In an alternative embodiment, the second length L2 is selected so that:

[0028] 2.25 mm i L2 S 2.75 mm.

[0029] In an alternative embodiment, the rod has a cylindrical shape with rod diameter d, said rod diameter d being selected so that:

[0030] 0.31<^ <0.34-

[0031] Another subject of the invention relates to a smart box intended to be positioned on a reception base adapted to receive said smart box, said reception base being able to be secured to a two-wheeled vehicle, said smart box comprising an electromagnet according to the invention, said electromagnet comprising a rod adapted to lock the smart box on the reception base, said smart box comprising a radio reception module adapted to receive unlocking signals for an action on the rod intended to unlock the smart box from the reception base. Description of figures

[0032] Other characteristics and advantages of the invention will appear during the reading of the detailed description which follows for the understanding of which reference will be made to the appended drawings in which:

[0033] [Fig. 1] illustrates in perspective an assembly comprising an intelligent box arranged on a receiving base;

[0034] [Fig.2] illustrates an exploded view of the assembly of [Fig.l];

[0035] [Fig.3] illustrates a sectional view along AA of the whole of [Fig.1] re presenting the smart box locked on the receiving base;

[0036] [Fig.4] illustrates a part of the sectional view along AA of the assembly of [Fig.l] representing the smart box unlocked on the reception base;

[0037] [Fig.5] illustrates the smart housing of [Fig.l] seen from below;

[0038] [Fig.6] illustrates an exploded view of the receiving base of [Fig.l];

[0039] [Fig.7] illustrates the receiving base of [Fig.6], in an open position;

[0040] [Fig.8] illustrates a sectional view of an electromagnet of the smart housing of Figures 1 to 5 in a locking position;

[0041] [Fig.9] illustrates the electromagnet of [Fig.8] in an unlocked position.

[0042] Description of embodiments

[0043] [Fig.l] to 3 illustrate an assembly 1 intended to be positioned on a part of a wheel type vehicle, such as a bicycle.

[0044] This set 1 includes:

[0045] - a smart box 10

[0046] - a reception base 20.

[0047] The smart box 10 is, here, a connected box that can be activated remotely. It can also be controlled manually, in part.

[0048] The smart box 10 is adapted to provide different functions to a user of the bike, such as an anti-theft alarm, a fall detector, an emergency call, a horn service, a backlight, a Bluetooth connection, or Bluetooth pairing.

[0049] The smart housing 10 here has a main body 101, a cover 102 and a tank 103. The main body 101 has a generally parallelepiped shape, of reduced size and having rounded parts at the ends. The shape of this main body 101 allows good handling of this housing when it is detached from the bicycle while limiting the inconvenience of its presence during use. Indeed, the housing can be positioned on a handlebar of the bicycle, it must not disturb the user's maneuvers.

[0050] The smart housing 10 also comprises the cover 102 intended to close the main body 101. The cover 102 here comprises:

[0051] - a main button 1021;

[0052] - a buzzer button 1022;

[0053] - a bat / BLE button 1023;

[0054] - a power button 1024.

[0055] The main button 1021 allows you to activate certain functions such as the anti-theft alarm (short press) or the emergency call (long press).

[0056] The buzzer button 1022 is used to activate the alarm. Depending on the type of press (short press, long press), the intensity of the sound is modulated. For example, a short press on the buzzer button 1022 will generate a sound of around 60 dB. A long press will generate a sound of around 100 dB.

[0057] The bat / BLE 1023 button allows you to activate Bluetooth (short press), activate the battery function (long press) or activate the Bluetooth pairing function (double press).

[0058] The power button 1024 allows you to activate the backlight function (short press) or to activate / deactivate the smart box 10 (long press).

[0059] The alarm function allows for quick and intuitive interaction. It provides a 3-second window to cancel activation. The smart box 10 gives the user immediate control, thus avoiding accidental activations. Automatic confirmation of activation ensures that the alarm is ready to operate as soon as the user moves away from the smart box 10. The ability to deactivate the alarm via a smartphone or a specific key sequence adds an additional layer of security, preventing unauthorized deactivations while providing flexibility for the legitimate user.

[0060] The smart box 10 also incorporates an algorithm capable of detecting a fall, which improves user safety. A 15-second window is used here to cancel the alarm, which provides an opportunity to avoid alerts unnecessary in the event of false detection, while ensuring that the alarm is triggered quickly in the absence of a response, thus alerting those nearby of a potential emergency. The ability to deactivate the alarm via a master button is essential for managing false alarms, ensuring that the user can quickly resume normal activities.

[0061] For the emergency call function, a 10-second sequence before activating the distress alarm gives the user time to prevent a false alarm while ensuring a rapid response in the event of a real emergency. This feature is crucial in situations where the user is in distress and needs to attract the attention of people nearby to get help quickly.

[0062] The audible warning function, thanks to a built-in speaker, plays a key role in signaling alerts and notifications. This feature ensures that the user and those nearby are immediately informed of an emergency situation, thus enhancing overall safety.

[0063] The backlight function not only improves the visibility of the smart box 10 in low light conditions but also increases user safety by making it more visible in the dark, thereby reducing the risk of accidents.

[0064] The Bluetooth function allows for simplified management of Bluetooth connectivity, with clear visual indicators, which facilitates the daily use of the smart box 10, allowing seamless interaction with other connected devices by improving the overall user experience.

[0065] The Bluetooth pairing function allows the automation of the Bluetooth pairing processor upon first activation. This makes the smart box 10 immediately useful and easy to connect to other devices, eliminating technical obstacles for the user.

[0066] The battery function provides battery level indicators to help users keep the smart box 10 operational, avoiding the inconvenience of a discharged battery. The ability to monitor the charging status ensures that the smart box 10 is always ready for use.

[0067] The remote unlock function allows the user to control the device without direct physical interaction, which is particularly useful in situations where direct access to the device is difficult.

[0068] The ON / OFF status indicators provide instant visual confirmation of whether the smart box 10 is activated or deactivated. This simplifies its use while ensuring that the user is always informed of the operational status of the box.

[0069] The main body 101 and the cover 102 define a space in which are housed different elements of the smart box 10, such as:

[0070] - a PCB card (for “Printed circuit Board);

[0071] - a loudspeaker 1011;

[0072] - a 1012 battery;

[0073] - an electromagnet 1013;

[0074] - a radio receiving module.

[0075] The PCB board is adapted to hold and electrically connect all of the electronic components of the smart housing 10.

[0076] The loudspeaker 1011 is adapted to produce an alarm-type sound from an electrical signal.

[0077] The battery 1012 is suitable for storing electrical energy. It powers all of the electronic components of the smart housing 10. In a preferred embodiment, the battery 1012 is a 600 mAh lithium battery.

[0078] The electromagnet 1013 also called a "solenoid" is adapted to produce a magnetic field when energized by an electric current. It comprises a body and an opening in said body. This opening is adapted to allow a rod 1014 to slide on which the magnetic field produced by the electromagnet 1013 will act. In the example of [Fig. 3], the smart housing 10 is in a locked position with the receiving base 20. In this configuration, the rod 1014 is housed, at least in part, in an orifice belonging to the receiving base 20. In the example of [Fig. 4], the smart housing 10 is in an unlocked position from the receiving base 20. In this configuration, the rod 1014 is out of the orifice of the receiving base 20. It will thus be noted that the length of the rod outside the electromagnet 1013 is greater in [Fig. 3] than in [Fig. 4].

[0079] The radio receiving module is adapted to receive signals, such as unlocking signals for unlocking the smart box 10 with the receiving base 20. These unlocking signals are, for example, transmitted by a smartphone of the user.

[0080] [Fig.5] illustrates, seen from below, the smart housing 10 of [Fig.l]. In this view, the smart housing 10 comprises:

[0081] - the tank 103;

[0082] - a plurality of holes 1015.

[0083] The plurality of holes 1015 are adapted to allow the sound emitted by the loudspeaker 1011 to pass through.

[0084] The tank 103 has the shape here of a hollow cylinder extending from the main body 101 of the intelligent housing 10. This tank 103 comprises, here, four fins 1031 extending inside the tank 103. The fins 1031 are here regularly distributed inside the tank 103.

[0085] Preferably, each fin 1031 comprises a zone forming a chamfer 10311 in which the thickness of the fin 1031 is reduced.

[0086] The tank 103 also comprises on the outside a circular groove 1032. This groove is adapted to receive a thoracic seal 1033, visible in particular in [Fig.3].

[0087] Figures 6 and 7 provide more details on the reception base 20. This comprises:

[0088] - a head 201;

[0089] - a fixing 202.

[0090] - a tray 203;

[0091] The head 201 has a circular flat surface 2011 and a ring 2012 protruding from the circular flat surface 2011 and delimiting said flat surface 2011. This ring 2012 is adapted to receive and guide the tank 103 of the intelligent housing 10 when positioning this housing 10 on the receiving base 20.

[0092] The head 201 also comprises:

[0093] - blocking means 2013;

[0094] - at least one 2014 key;

[0095] - means of depreciation 2015.

[0096] The locking means 2013 protrude from the flat surface 2011. Here, they have the shape of a cross. These locking means 2013 are adapted to lock the plate 203 in rotation on the circular flat surface 2011.

[0097] The keying devices 2014 are adapted to prevent incorrect mounting of the plate 203 on the circular flat surface 2011. The keying devices 2014 here form four studs protruding from the circular flat surface 2011.

[0098] The damping means 2015 facilitate the positioning of the housing 10 on the receiving base 20. These damping means 2015 here form two half-spheres protruding from the circular flat surface 2011.

[0099] The plate 203 is adapted to be housed in the head 201. The plate 203 has, here, the general shape of a disc comprising:

[0100] - at least one cavity 2031;

[0101] - at least one notch 2032.

[0102] The cavity 2031 is intended to receive the rod 1014 of the intelligent housing 10 for locking this housing 10 with the receiving base 20. The plate 203 here comprises four cavities regularly distributed so as to be able to easily receive the rod 1014 whatever the original positioning of the intelligent housing 10 with respect to the receiving base 20.

[0103] The notch 2032 is intended to receive a fin 1031 of the intelligent housing 10.

[0104] As illustrated in Figures 6 and 7, the attachment 202 comprises:

[0105] - a fixed part 2021;

[0106] - a moving part 2022;

[0107] - a 2023 pivot link.

[0108] The fixed part 2021 is integral with the head 201. It comprises a body 20211 and a protrusion 20212. The body 20211 has a rounded internal shape allowing the receiving base 20 to be positioned on an area of ​​the two-wheeled vehicle, such as a handlebar.

[0109] The movable part 2022 rotates relative to the fixed part 2021 around the pivot connection 2023. This movable part 2022 comprises a body 20221 and a cavity 20222. The body 20221 also has a rounded internal shape. It is adapted to be in movement via the pivot connection 2023 between a closed position in which the protuberance 20212 of the fixed part is housed in the cavity 20222 of the movable part and an open position. The closed position is illustrated in particular in [Fig.6]. The open position is illustrated in [Fig.7].

[0110] Figures 8 and 9 illustrate in more detail the electromagnet 1013 of Figures 2 to 4.

[0111] The electromagnet 1013 here comprises:

[0112] - body 10131;

[0113] - a chamber 10132 internal to the body;

[0114] - the rod 1014 intended to slide in said chamber 10132, said rod 1014 able to take a locked position (visible in [Fig.9]) in which it comes out, at least in part, from the chamber 10132 to come and be housed in the cavity 2031 of the receiving base 20, said rod 1014 being able to take an unlocked position (visible in [Fig.8]) in which it returns, at least in part, into the chamber 10132 which makes it come out of the cavity 2031;

[0115] - a compression spring 10133 disposed in the chamber 10132, said compression spring compression 10133 being adapted to act against the rod 1014 in order to maintain it in a locked position;

[0116] - a coil 10134 housed in the body 10131, said coil 10134 being adapted to act on the rod 1014 in order to return it to an unlocked position, when said coil 10134 is electrically powered by the battery 1012 via the cables of length Le (visible in [Fig.9]). More particularly, the coil 10134 is adapted to generate a magnetic field when it is powered by an electric current. The rod will react to this magnetic field by moving. The rod is, for example, a ferrite core.

[0117] The body of the electromagnet has a cylindrical shape of height H and body diameter D, said height H and said diameter D being selected so that: [0H8] l,10 <f <1,20

[0119] Preferably, the height H and the body diameter D are selected so that:

[0120] l,13 <f<l,17-

[0121] Preferably, H / D is equal to 1.15.

[0122] The height H is selected so that: 10 mm SH 4 10.8 mm.

[0123] Preferably, 10.25 mm i H i 10.65 mm.

[0124] Preferably, H is equal to 10.4 mm.

[0125] The body diameter D is selected so that: 8.85 mm D 9.15 mm.

[0126] Preferably, 8.95 mm D 9.05 mm.

[0127] Preferably, D is equal to 9 mm.

[0128] The rod 1014 has a first length L1 outside the chamber when it is in a locked position and a second non-zero length L2 outside the chamber when it is in an unlocked position, said first length L1 and said second length L2 are selected so that:

[0129] 2 <^<2.50-

[0130] Preferably, the first length L1 and the second length L2 are selected so that:

[0131] 2.07 < f| < 2.33-

[0132] The first length L1 is selected so that: 5.25 mm L1 5.75 mm.

[0133] The second length L2 is selected so that: 2.25 mm S L2 4 2.75 mm.

[0134] The rod 1014 has a cylindrical shape of rod diameter d, said rod diameter d being selected so that: 0 31 £ 4 < 0.34-

[0135] Preferably, the diameter of the rod is selected so that: 2.90 mm d 4 3.5 mm.

[0136] Preferably, the diameter of the rod is equal to 3 mm.

[0137] Another object of the invention relates to the smart box 10 intended to be positioned on the reception base 20 adapted to receive said smart box 10. The reception base 20 is capable of being secured to a two-wheeled vehicle, said smart box 10 comprising the electromagnet 1013. The electromagnet comprises the rod 1014 adapted to lock the smart box 10 on the reception base 20. The smart box 10 comprising the radio reception module adapted to receive unlocking signals for an action on the rod 1014 intended to unlock the smart box 10 from the reception base 20.

[0138] In other words, the invention also covers a smart housing intended to be positioned on a receiving base adapted to receive said smart housing. The receiving base is capable of being secured to a two-wheeled vehicle. The smart housing comprises a rod capable of being housed in a cavity of said base. reception during positioning of said smart housing on said receiving base for locking of said smart housing with said receiving base. The smart housing comprising means for unlocking said smart housing with said receiving base, said unlocking means being capable of removing said rod from said cavity following remote activation of said unlocking means.

[0139] The smart box is here a connected box. The user can thus remotely activate the unlocking means to detach the smart box from the reception base. Such activation can be carried out using a smartphone via a dedicated application. In addition, the unlocking means are physically inaccessible once the smart box is positioned and locked on the reception base. Manual unlocking of the smart box is therefore not possible. This avoids the risk of the smart box being stolen by a third party while making it possible for the legitimate user to dismantle this box.

[0140] The unlocking means comprise an electromagnet adapted to act on the rod.

[0141] This electromagnet is suitable for controlling the rod. In particular, it allows the withdrawal of the rod from the cavity of the receiving base to ensure unlocking.

[0142] The smart housing comprises a main body and a tank extending from said main body, said tank comprising at least one fin extending inside said tank, said fin being intended to be housed in a notch of the receiving base during positioning of said smart housing on said receiving base.

[0143] The positioning of the smart box on the receiving base is carried out in several stages. In a first stage, the smart box is placed on the receiving base, which allows the tank to enter a dedicated area of ​​the receiving base. In a second stage, the smart box is rotated relative to the receiving base so as to make the fin enter the notch. Once the fin is taken in the notch, the rod is housed in the cavity and the smart box then becomes integral with the receiving base and therefore with the bicycle.

[0144] The fin is chamfered, at least in part.

[0145] This makes it easier for the fin to enter the notch when the smart housing rotates relative to the receiving base.

[0146] The tank comprises four fins regularly distributed on said tank.

[0147] This increases the contact areas between the fins and the notches and improves the overall mechanical strength between the smart housing and the receiving base.

[0148] The smart housing includes a thoric seal positioned around the tank.

[0149] The O-ring allows for better cooperation between the smart housing and the receiving base and limits the occurrence of play which could facilitate the removal of the housing by a malicious third party.

[0150] Another object of the invention relates to a reception base intended to receive a smart box, said reception base comprising:

[0151] - securing means, said securing means being capable of lidarize said reception base with a two-wheeled vehicle;

[0152] - a tray secured to the securing means, said tray comprising at least at least one cavity, said cavity being capable of receiving a rod of the smart housing for locking said smart housing with said receiving base during positioning of said smart housing on said receiving base, said smart housing comprising means for unlocking said smart housing with said receiving base, said unlocking means being capable of removing said rod from said cavity, said unlocking means being remotely activatable.

[0153] The tray comprises at least one notch intended to receive a fin of the smart housing during the positioning of said smart housing on said receiving base, said notch being present on a periphery of the tray.

[0154] The receiving base comprises four cavities capable of receiving the rod of the smart housing, said cavities being regularly distributed on the plate.

[0155] This makes it easier to insert the rod into one of the cavities when positioning the smart housing, by limiting the amplitude of the rotational movement of the smart housing relative to the receiving base.

[0156] Another object of the invention relates to a system for locking / unlocking a smart box on a receiving base, said receiving base being capable of being secured to a two-wheeled vehicle, said locking / unlocking system comprising:

[0157] - a rod, said rod being capable of being housed in a cavity for locking said smart box on said receiving base;

[0158] - said cavity being capable of receiving the rod for locking the smart housing on the basis of reception;

[0159] - unlocking means capable of removing said rod from said cavity for a release locking the smart box with the receiving base, said unlocking means being remotely activatable.

[0160] Another object of the invention also relates to a system for locking / unlocking the smart housing 10 on the receiving base 20. The receiving base 20 is capable of being secured to the two-wheeled vehicle. The locking / unlocking system thus comprises the rod 1014. As has already been described, this rod 1014 is capable of being housed in the cavity 2031 for locking the smart housing 10 on the receiving base 20. The locking / unlocking system also comprises the cavity 2031 capable of receiving the rod 1014 for locking the smart housing 10 on the receiving base 20. The locking / unlocking system further comprises unlocking means 1013 capable of removing the rod 1014 from the cavity 2031 for unlocking the smart housing 10 with the receiving base 20. These unlocking means 1013 can be activated remotely.

[0161] The invention also relates to a method for locking / unlocking the smart housing 10 on the receiving base 20. In a first step of this method, the smart housing 10 is placed on the receiving base 20. In this first step, the tank 103 is thus positioned in the ring 2012 of the head 201 of the receiving base 20. In a second step, the smart housing 10 is rotated relative to the receiving base 20 so as to cause the fins 1031 of the tank 103 to enter the notches 2032 of the plate 203 of the receiving base 20. This positioning of the fins 1031 in the notches 2032 is facilitated by the presence of the chamfers 10311 on the fins 1031 as well as by the damping means 2015 which compensate, at least in part, a possible clearance between the smart box 10 and the reception base 20.Once the fins are taken into the notches, the rod 1014 is housed in one of the cavities 2031 and the intelligent housing 10 then becomes integral with the reception base 20 and therefore with the bicycle.

[0162] In the case where an unlocking signal is sent by the user's smartphone, it is picked up by the radio reception module of the smart box 10. An electric current is then sent to the electromagnet 1013, via the PCB, to generate a magnetic field. This magnetic field will act on the rod 1014 to bring it back, at least in part, into the body of the electromagnet 1013, thus releasing the cavity 2031 of the receiving base 20. It is then possible for the user to rotate the smart box 10, in a direction opposite to that of the locking, to cause the fins 1031 to come out of the notches 2032 and consequently release the smart box 10 from the receiving base 20.

Claims

1.

2.

2.

3.

10.

4.

5. Claims Electromagnet for smart housing (10) intended to be positioned on a receiving base (20), said receiving base (20) being capable of being secured to a two-wheeled vehicle, said electromagnet (1013) comprising: - a body (10131); - a chamber (10132) internal to the body; - a rod (1014) intended to slide in said chamber, said rod (1014) being able to take a locked position in which it comes out, at least in part, from the chamber to be housed in a cavity (2031) of the receiving base (20), said rod (1014) being able to take an unlocked position in which it returns, at least in part, into the chamber which makes it come out of the cavity (2031); - a compression spring (10133) disposed in the chamber, said compression spring being adapted to act against the rod (1014) in order to maintain it in a locked position; - a coil (10134) housed in the body (10131), said coil (10134) being adapted to act on the rod (1014) in order to return it to an unlocked position, when said coil (10134) is electrically powered; characterized in that, the body (10131) of the electromagnet having a cylindrical shape of height H and body diameter D, said height H and said body diameter D are selected so that: 1.10 <f < 1,20- Electromagnet according to claim 1, wherein the height H and the body diameter D are selected so that: l,13 <f <1,17- 3. Electromagnet according to any one of claims 1 to 2, wherein the height H is selected so that: mm i H i 10.8 mm.

4. Electromagnet according to any one of claims 1 to 3, wherein the body diameter D is selected so that: 8.85 mm D 9.15 mm.

5. Electromagnet according to any one of claims 1 to 4, wherein the rod (1014) having, when said rod is in a locked position, a first length L1 measured outside the chamber and, when said rod (1014) is in an unlocked position, a second non-zero length L2, said first length L1 and said second length L2 being selected so that:

5. 2 <g <2,50-

6. An electromagnet according to claim 5, wherein said first length L1 and said second length L2 are selected such that:

6. 2.07<^ <2.33-

7. 7. An electromagnet according to any one of claims 5 or 6, wherein the first length L1 is selected so that: 5.25 mm L1 5.75 mm.

8. An electromagnet according to any one of claims 5 to 7, wherein the second length L2 is selected so that: 2.25 mm L2 2.75 mm.

9. An electromagnet according to any one of claims 1 to 8, wherein the rod has a cylindrical shape of rod diameter d, said rod diameter d being selected so that:

9. 0.31 <^<0.34-

10. Smart box intended to be positioned on a receiving base (20) adapted to receive said smart box (10), said receiving base (20) being able to be secured to a two-wheeled vehicle, said smart box (10) comprising an electromagnet according to any one of claims 1 to 9, said electromagnet comprising a rod (1014) adapted to lock the smart box (10) on the receiving base (20), said smart box (10) comprising a radio receiving module adapted to receive unlocking signals for an action on the rod (1014) intended to unlock the smart box (10) from the receiving base (20).

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