Charging plug with electric shock preventer

Abstract

The invention relates to a charging plug (1) for a motor vehicle, comprising: at least one cylindrical cavity (12) having a connection side (4), an interface side (6); a retention cartridge (14) arranged in the cylindrical cavity (12); and an electrical connector (16) arranged in the retention cartridge (14), the charging plug (1) comprising a shock preventer (30) associated with an end (20) of the electrical connector (16) close to the coupling side (4), the shock preventer comprising a peripheral portion (32) and a diaphragm (34), the shock preventer (30) having a protection position in which the diaphragm (34) is substantially flat and a coupling position (46) in which the diaphragm (34) is substantially flat, the diaphragm (34) deforms toward an interior (48) of the retention barrel (14).

Description

[0001] The present invention relates to the field of the automotive industry and, more particularly, to the field of charging systems for motor vehicles, such systems being installed on hybrid or electric vehicles.

[0002] These hybrid or electric vehicles generally include an electrical energy storage unit (such as a battery) that enables electrical energy to be supplied to the vehicle, and this electrical energy is converted into mechanical power required to drive the vehicle by the powertrain. When the vehicle is in motion, the energy stored in the battery decreases, and then the battery needs to be recharged by the user, for example, by connecting it regularly to the power grid.

[0003] For this purpose, there are charging devices, such as wall-mounted terminals (also known as wall boxes), which enable the vehicle's battery to be recharged. These wall-mounted terminals may include a charging cable connected to the vehicle via a connecting device (such as a charging plug), and such a charging plug is configured to cooperate with a complementary electrical socket of a hybrid or electric vehicle.

[0004] Once the charging plug is connected to the wall-mounted terminal, current can flow through the cable, in particular to the electrical pins of the charging plug. Thus, for example, if the user's finger comes into contact with the charging plug and its electrical pins, there may be a risk of electric shock or electrocution.

[0005] In this context, the main subject of the present invention is thus a charging plug for a motor vehicle, the charging plug including a plug fitting having a coupling side, an interface side, and at least one cylindrical cavity that extends mainly in the longitudinal direction and passes through the plug fitting from the coupling side to the interface side. The charging plug includes a retaining cylinder disposed in the cylindrical cavity and an electrical connector disposed in the retaining cylinder, the end of the electrical connector being adjacent to the coupling side. The charging plug includes an electric shock protector associated with the end of the electrical connector and including a peripheral portion and a diaphragm, and the electric shock protector is configured to have a protection position and a coupling position. In the protection position, the diaphragm is substantially flat, and in the coupling position, the diaphragm is deformed towards the interior of the retaining cylinder.

[0006] The charging plug according to the present invention is intended to recharge a vehicle, more specifically an electric vehicle. The plug includes a plug fitting, which is a connecting device. One side of the plug fitting is a coupling side configured to cooperate with a charger of the vehicle (such as a complementary charging socket), and the other side of the plug fitting is an interface side configured to cooperate with a wall-mounted terminal, for example, via a charging cable. The cylindrical cavity that receives the retaining cylinder (which in turn receives the electrical connector) completely passes through the plug fitting. Such an electrical connector is, for example, a pin for establishing electrical contact with the pins of a charging socket provided on the vehicle.

[0007] The electric shock protector is associated with the end of the electrical connector; this is understood to mean that the electric shock protector cooperates with the end. The electric shock protector includes a peripheral portion that helps hold it in place relative to the retaining cylinder, and also a flexible and deformable diaphragm. This deformation of the diaphragm allows the diaphragm to be in a protection position or a coupling position. In the protection position, the diaphragm forms a generally flat disk and prevents any contact between the electrical connector and the fingers of the user of the charging plug. In the coupling position, under the action of pressure, the pins of the vehicle charger can pass through the diaphragm. In this coupling position, the diaphragm is no longer flat; when the pins abut against the diaphragm, the diaphragm deforms in such a way that it extends towards the interior of the retaining cylinder.

[0008] According to a feature of the invention, the electric shock protector is arranged in the longitudinal direction between the retaining cylinder and the wall of the cylindrical cavity facing the end of the electrical connector.

[0009] A first embodiment of the charging plug is to arrange the electric shock protector between the retaining cylinder and the wall of the cylindrical cavity. In this first embodiment, the electric shock protector is held in place by being pressed between these two elements.

[0010] According to an alternative feature of the invention, the electric shock protector and the retaining cylinder form a one-piece assembly.

[0011] This is the second embodiment, in which the electric shock protector and the retaining cylinder form a one-piece part, which can be obtained, for example, by overmolding. In this case, the peripheral portion is formed by the inner wall of the retaining cylinder.

[0012] According to a feature, the electrical connector has a tubular shape with an inner face and an outer face. The inner face is provided with bosses that are configured to contact the pins of the charger, and these bosses are arranged at a certain distance from the end associated with the electric shock protector.

[0013] According to a feature of the invention, in the coupling position, the diaphragm is at a certain distance from the bosses.

[0014] This is understood to mean that there is a longitudinal offset between the bosses and the end associated with the electric shock protector. This offset makes it possible to avoid contact between the bosses and the diaphragm when the diaphragm is in the coupling position, and thus prevents the electric shock protector from becoming a barrier between the bosses and the pins of the charger.

[0015] According to a feature, the diaphragm includes slits that are configured to deform when the pins of the charger pass through.

[0016] More specifically, the diaphragm includes strips separated from each other by the slits. In the coupling position, these slits deform and open, causing the strips to move away from each other, thus allowing the pins of the charger to pass through.

[0017] According to another feature of the present invention, the diaphragm includes a central opening, and slits extend from this central opening in a star shape.

[0018] Within the electric shock protector, the diaphragm extends from the peripheral portion to the central opening. The slits extend from the central opening towards the peripheral portion, and the slits are arranged at regular angles relative to each other such that the slits form a star shape.

[0019] According to one feature, the slits widen as they move away from the central opening.

[0020] According to an alternative feature, the slits have a constant width as they move away from the central opening.

[0021] In this case, it will be understood that there are two separate embodiments of the slits: a first embodiment and a second embodiment. In the first embodiment, they become wider from the central opening to the peripheral portion, and in the second embodiment, their width remains the same regardless of the measurement point.

[0022] According to a feature of the present invention, the slits define strips that are hinged to the peripheral portion therebetween.

[0023] According to another feature of the present invention, the edge of the strip that defines the central opening is rounded.

[0024] Thus, the strip does not have a protruding edge that may hinder the insertion of the pins of the charger.

[0025] According to another feature, the diaphragm is made of rubber.

[0026] Thus, the diaphragm is made of a flexible and deformable material. The rubber is preferably silicone rubber with a Shore A hardness between 25 and 100.

[0027] According to a feature of the present invention, the charging plug includes a plurality of retention cylinders, each of which houses an electrical connector, and each retention cylinder is connected to at least one other retention cylinder on the interface side by a connecting tab.

[0028] Thus, the retention cylinders are arranged in a spider web arrangement within the plug fitting, and each connecting tab can engage two or more retention cylinders with each other. This arrangement requires additional machining, namely forming the connecting tabs, but enables all the retention cylinders to be inserted in a single assembly step and saves time in this regard.

[0029] According to another feature, the connecting tabs extend in slots on the interface side.

[0030] This slot corresponds to a hollow portion on the interface side that extends between two adjacent retention cylinders.

[0031] The present invention further relates to a method for assembling a charging plug as described above, the method comprising the steps of inserting an electric shock protector into a cylindrical cavity of a plug fitting, inserting a retaining cylinder into this cylindrical cavity, and a clamping step during which the electric shock protector is pressed against the wall of the cylindrical cavity by the retaining cylinder.

[0032] This assembly method corresponds to a first embodiment of the charging plug, i.e., an embodiment in which the electric shock protector is arranged between both the retaining cylinder and the wall of the cylindrical cavity.

[0033] As an alternative, the present invention relates to a method for assembling a charging plug as described above, the method comprising the steps of overmolding the electric shock protector onto the retaining cylinder, and inserting the assembly formed by the retaining cylinder and the electric shock protector into a cylindrical cavity of a plug fitting.

[0034] This alternative of the assembly method corresponds to a second embodiment of the charging plug, i.e., an embodiment in which the electric shock protector is arranged inside the retaining cylinder. In this case, overmolding makes it possible to avoid the assembly operation.

[0035] With reference to the accompanying drawings, further features, details and advantages of the present invention will become more apparent by reading the following description and by way of non-limiting illustrative exemplary embodiments, in which:

[0036] Figure 1 shows schematically a perspective view of a charging plug according to the present invention, the connection side of which is visible;

[0037] Figure 2 shows schematically Figure 1 the perspective view of the charging plug in

[0038] Figure 3 shows schematically Figure 1 the cross-sectional view of the charging plug in

[0039] Figure 4 shows schematically Figure 1 another cross-sectional view of the charging plug in

[0040] Figure 5 shows schematically Figure 1 the protection position and the connection position of the electric shock protector of the charging plug in

[0041] Figure 6 shows schematically according to a second embodiment​​​​​​Figure 5 The electric shock preventer in

[0042] The features, variations, and different embodiments of the present invention can be combined with each other in different combinations as long as they are not incompatible or mutually exclusive. In particular, if the selection of the features described below, independent of other features, is sufficient to provide a technical advantage and / or distinguish the present invention from the prior art, then a variation of the present invention may be contemplated to include only that feature selection.

[0043] In the drawings, elements common to several drawings retain the same reference numerals.

[0044] In the following detailed description, the terms "longitudinal", "transverse", and "vertical" relate to the orientation of the charging plug according to the present invention. The longitudinal direction corresponds to the main extension direction of the cylindrical cavity of the charging plug, and this longitudinal direction is parallel to the longitudinal axis L of the coordinate system L, V, T shown in the drawings. The vertical direction corresponds to the direction perpendicular to the ground on which the motor vehicle to be recharged via the charging plug is placed, and this vertical direction is parallel to the vertical axis V of the coordinate system L, V, T, and the vertical axis V is perpendicular to the longitudinal axis L. Finally, the transverse direction corresponds to the direction parallel to the transverse axis T of the coordinate system L, V, T, and the transverse axis T is perpendicular to the longitudinal axis L and the vertical axis V.

[0045] Therefore, Figure 1 and Figure 2 A perspective view of the charging plug 1 according to the present invention is schematically shown. This charging plug 1 is intended to be assembled to a hybrid vehicle or an electric vehicle for recharging the battery of the motor vehicle.

[0046] The charging plug 1 has a plug fitting 2 that extends longitudinally between a connection side 4 and an interface side 6. The connection side is particularly visible in Figure 1 , and the interface side is particularly visible in Figure 2 . The connection side 4 is configured to connect to a complementary charger of the motor vehicle, while the interface side 6 is intended to be connected to a wall socket via a charging cable.

[0047] The plug fitting 2 has an internal space 8 that is bounded by a transverse wall 10 on the interface side 6. Conversely, the internal space 8 is open to the outside of the charging plug 1 on the connection side 4. The internal space 8 contains at least one cylindrical cavity 12. This cylindrical cavity 12 mainly extends in the longitudinal direction L. The cylindrical cavity completely passes through the plug fitting 2, that is, from the connection side 4 to the interface side 6.

[0048] More specifically, in this case, the charging plug 1 includes seven cylindrical cavities 12. Thus, there is a central cylindrical cavity 12, and six other cylindrical cavities 12 are arranged around this central cylindrical cavity in a star shape. Therefore, two upper cylindrical cavities 12 arranged in a single longitudinal vertical plane, three intermediate cylindrical cavities 12 (including the central cylindrical cavity 12) arranged in a single longitudinal vertical plane, and two lower cylindrical cavities 12 which are also arranged in a single longitudinal vertical plane can be defined. The lower cylindrical cavities and the intermediate cylindrical cavities 12 have similar diameters, while the upper cylindrical cavities 12 have a smaller diameter.

[0049] As will be described more specifically later, the upper cylindrical cavities 12 receive elements that contribute to the control function during the charging of a motor vehicle. The lower cylindrical cavities and the intermediate cylindrical cavities 12, for their part, receive elements dedicated to the transmission of single-phase or three-phase current, or receive one or more neutral elements connected to the grounding piece. Unless otherwise stated, the features now described with respect to one of the cylindrical cavities 12 are intended to apply to either the intermediate cylindrical cavity or the lower cylindrical cavity 12.

[0050] Each cylindrical cavity 12 houses a retention cylinder 14 that extends mainly in the longitudinal direction L. This retention cylinder 14 receives the electrical connector 16 of the charging plug 1. The retention cylinder 14 is made of, for example, plastic and can ensure that this connector 16 is held in place within the plug fitting 2. Such an electrical connector 16 takes the form of, for example, a pin that is intended to cooperate with the pin 17 of a complementary charger provided on the vehicle, in particular by transmitting current to this pin. Figure 3 and Figure 4 This pin 17 of the charger is schematically shown.

[0051] On the interface side 6, and as Figure 2 shown, the retention cylinders 14 are connected to each other via connecting tabs 18, which are material extensions of these retention cylinders 14. More specifically, each of the retention cylinders 14 is connected to at least one other retention cylinder via such a connecting tab 18. The retention cylinder 14 arranged in the central cylindrical cavity 12 is connected to four other cylindrical cavities 12 via, for example, four connecting tabs 18, while the retention cylinders 14 of the lower cylindrical cavities 12 are each connected to three other cylindrical cavities 12 via three connecting tabs 18. Each connecting tab 18 extends in a slot machined in the interface side 6 for this purpose, and more particularly in the transverse wall 10 of this interface side 6, such that the connecting tab 18 does not protrude from the transverse wall 10. In this case, the connecting tabs 18 connect the retention cylinders 14 in a spider web arrangement.

[0052] The electrical connector 16 extends within the retention cylinder 14 between a first end 20 adjacent to the connection side 4 and a second end 22 adjacent to the interface side 6. As is particularly clearly shown in Figure 3 and Figure 4 these figures, which are cross-sectional views of the charging plug 1, the electrical connector 16 is in the form of a tube. Thus, this electrical connector has an outer face 24 in contact with the retention cylinder 14 and an inner face 26 positioned opposite the outer face 24. The inner face 26 is deformed so as to have bosses 28 which are configured to come into contact with the pins 17 of the vehicle charger in order to transmit an electric current to the pins. Such bosses 28 are closer to the first end 20 than to the second end 22, but are still provided at a certain distance from this first end 20.

[0053] According to the invention, the charging plug 1 includes an electric shock protector 30. The function of such an electric shock protector 30 is to avoid an electric shock or even electrocution that may be caused by contact between one of the bosses of the electrical connector 16 and the finger of the user of the charging plug 1, without preventing the passage of the pins 17 of the vehicle charger.

[0054] To this end, the electric shock protector 30 is associated with the first end 20 of the electrical connector 16. According to an embodiment, such an association can itself be manifested by the electric shock protector pressing against this first end 20 or being overmolded in this first end. Specifically, there is a first embodiment of the charging plug 1 in which the electric shock protector 30 is longitudinally provided between the retention cylinder 14 and the wall of the cylindrical cavity 12. In this case, this wall is the transverse wall 31 of the cylindrical cavity 12 on the connection side 4, which faces the first end 20 of the electrical connector and is substantially parallel to the transverse wall 10 of the interface side 6. It should be understood that in this first embodiment, the electric shock protector 30 is clamped between the transverse wall 31 and the retention cylinder 14. This first embodiment is particularly visible in Figure 3 and Figure 4 As an alternative, in a second embodiment, not shown here, the electric shock protector 30 and the retention cylinder 14 can form a one-piece assembly. In this case, the electric shock protector 30 and the retention cylinder 14 are overmolded with each other so as to form a one-piece part.

[0055] Now with respect to Figure 5 and Figure 6Describing the electric shock protector 30, these figures show various configurations and various embodiments. The electric shock protector 30 is in the form of a disk and includes a raised peripheral portion 32 that forms a surround for the diaphragm 34. The diameter of such a diaphragm 34 is substantially equal to the diameter of the electrical connector 16. The diaphragm is made of a flexible and deformable material, such as rubber. Such rubber is preferably silicone rubber with a Shore A hardness between 25 and 100. The peripheral portion 32 helps to hold the electric shock protector 30 in place, either against the retaining cylinder 14 in the first embodiment of the charging plug 1 or within the retaining cylinder 14 in the second embodiment. In this second embodiment, the peripheral portion 32 can further be formed at least in part by the inner wall of the retaining cylinder 14.

[0056] The diaphragm 34 includes elastic strips 36 having an approximately triangular shape. These elastic strips 36 are hinged on the peripheral portion 32; in other words, the elastic strips extend from this peripheral portion 32. Thus, the elastic strips have an edge connected to the peripheral portion 32 and a rounded free edge 38 that defines a central opening 40 within the diaphragm 32. Such a central opening 40 corresponds to an orifice within the diaphragm 32. The slits 42 that define two adjacent elastic strips 36 extend from this central opening 40. Thus, it should be understood that the shape of the elastic strips 36 depends on how the slits 42 are cut and how they are arranged within the diaphragm 34. In this case, these slits 42 extend in a star shape from the central opening 40 towards the peripheral portion 32 but do not contact the peripheral portion.

[0057] Figure 5 and Figure 6 Two separate embodiments corresponding to the slits 42 are, respectively, Figure 5 the first embodiment shown in Figure 6 and the second embodiment shown in

[0058] In their first embodiment, the width of the slits 42 increases as they are further away from the central opening 40; in other words, these slits 42 are thinner near the central opening 40 than near the peripheral portion 32. Conversely, in their second embodiment, the slits 42 have a constant width. Whether in their first embodiment or in their second embodiment, the slits 42 have rounded ends, thereby allowing the elastic strips 36 to hinge better and limiting the risk of the diaphragm 34 tearing at this location. Figure 5 Thus, the electric shock protector 30 has a protection position 44 or a rest position that prevents contact between the user's finger and one of the electrical connectors 16 of the charging plug 1. In Figure 1In this protection position 44 which is also visible in [description of relevant figure], the diaphragm 34 is substantially flat. This should be understood to mean that the peripheral part 32 and the central opening 40 are substantially arranged in a single plane. The electric shock protector 30 can also take a connection position 46 or a stress position (also shown in [description of relevant figure]), which allows electrical contact between the electrical connector 16 and the pin 17 of the vehicle charger. In this connection position 46, the diaphragm 34 is deformed such that it extends at least partially towards the interior 48 of the retaining cylinder. This deformation is the result of the pressure exerted by the pin 17 when passing through the central opening 40. It should be understood that in this connection position 46, the diaphragm 34 is no longer flat; the slit 42 deforms and opens when the pin 17 passes through, thus helping to move the elastic strips 36 away from each other and extend them towards the second end 22 into the interior 48 of the retaining cylinder, as shown particularly clearly in [description of relevant figure]. Since the free edges 38 of the elastic strips 36 bordering the central opening 40 have the rounded shape as described above, it is easier to insert the pin 17 through this central opening 40. Figure 3 and Figure 4 In [description of relevant figure], the connection position or stress position allows electrical contact between the electrical connector 16 and the pin 17 of the vehicle charger. In this connection position 46, the diaphragm 34 is deformed such that it extends at least partially towards the interior 48 of the retaining cylinder. This deformation is the result of the pressure exerted by the pin 17 when passing through the central opening 40. It should be understood that in this connection position 46, the diaphragm 34 is no longer flat; the slit 42 deforms and opens when the pin 17 passes through, thus helping to move the elastic strips 36 away from each other and extend them towards the second end 22 into the interior 48 of the retaining cylinder, as shown particularly clearly in [description of relevant figure]. Since the free edges 38 of the elastic strips 36 bordering the central opening 40 have the rounded shape as described above, it is easier to insert the pin 17 through this central opening 40. Figure 4 In this protection position 44 which is also visible in [description of relevant figure], the diaphragm 34 is substantially flat. This should be understood to mean that the peripheral part 32 and the central opening 40 are substantially arranged in a single plane. The electric shock protector 30 can also take a connection position 46 or a stress position (also shown in [description of relevant figure]), which allows electrical contact between the electrical connector 16 and the pin 17 of the vehicle charger. In this connection position 46, the diaphragm 34 is deformed such that it extends at least partially towards the interior 48 of the retaining cylinder. This deformation is the result of the pressure exerted by the pin 17 when passing through the central opening 40. It should be understood that in this connection position 46, the diaphragm 34 is no longer flat; the slit 42 deforms and opens when the pin 17 passes through, thus helping to move the elastic strips 36 away from each other and extend them towards the second end 22 into the interior 48 of the retaining cylinder, as shown particularly clearly in [description of relevant figure]. Since the free edges 38 of the elastic strips 36 bordering the central opening 40 have the rounded shape as described above, it is easier to insert the pin 17 through this central opening 40.

[0059] As Figure 3 and Figure 4 shown (these two figures are respectively a view of the pin 17 partially inserted through the central opening 40 and a view of this pin 17 in contact with the boss 28 after being fully inserted), in the connection position 46, the diaphragm 34 and especially its elastic strips 36 are at a certain distance from the boss 28. Specifically, there is a longitudinal offset between these bosses 28 and the first end 20 associated with the electric shock protector 30. This longitudinal offset makes it possible to avoid interference from the electric shock protector 30 between the boss 28 and the pin 17 of the charger of the motor vehicle, which would interrupt the transmission of current, especially the recharging of the vehicle. As a result, when the pin 17 is pushed through the central opening 40 of the diaphragm 34, the elastic strips 36 of this diaphragm 34 are deformed and press against the inner face 26 of the electrical connector 16, and the longitudinal offset ensures that the elastic strips do not contact the boss 28 when this occurs.

[0060] A method for assembling the charging plug 1 according to the present invention will now be described for each of the above two embodiments.

[0061] In a first embodiment, namely the embodiment in which the electric shock protector 30 is arranged between the retaining cylinder 14 and the transverse wall 31 of the cylindrical cavity 12, the assembly method is preceded by the step of manufacturing the electric shock protector 30 such that the slit 42 has an increased width as in its first embodiment or a constant width as in its second embodiment. The assembly method comprises the step of inserting the electric shock protector 30 into the cylindrical cavity 12 of the plug fitting 2 and then the step of inserting the retaining cylinder 14 into the cylindrical cavity 12. If there are a plurality of retaining cylinders 14, the insertion step will be completed when the connecting tabs 18 of these retaining cylinders 14 abut against the slots on the transverse wall 10 intended to receive them on the interface side. The retaining cylinder 14 will also abut against the electric shock protector 30 which itself abuts against the transverse wall 31. The assembly method then comprises a clamping step during which the electric shock protector 30 is pressed against the transverse wall 31 of the cylindrical cavity 12 by the retaining cylinder 14. This clamping step makes it possible to ensure that there are no gaps on the one hand between the transverse wall 31 and the electric shock protector 30 and on the other hand between the electric shock protector 30 and the retaining cylinder 14. Then, the assembly method comprises the step of inserting the electrical connector 16 into its retaining cylinder 14, which electrical connector can then come into contact via its boss 28 with the pin 17 of the charger of the motor vehicle in order to transmit to the motor vehicle the current required for its recharging.

[0062] In a second embodiment, namely the embodiment in which the electric shock protector 30 and the retaining cylinder 14 form a one-piece part, the assembly method comprises the step of overmolding the electric shock protector 30 and the retaining cylinder 14. In the same way as in the first embodiment, the electric shock protector can be produced such that the slit 42 has an increased width (as can be seen particularly clearly in Figure 5 ) or the slit 42 has a constant width (as shown in Figure 6 ). The assembly method then comprises the step of inserting the one-piece assembly thus formed by the electric shock protector 30 and the retaining cylinder 14 into the cylindrical cavity 12 of the plug fitting 2 and then comprises an insertion step during which the electrical connector 16 itself is inserted into the one-piece assembly. The pin 17 can then be inserted through the electric shock protector 30 to come into contact with the boss 28 of the electrical connector 16 and thus make it possible to recharge the vehicle.

[0063] Thus, the present invention provides a charging plug with an electric shock protector which makes it possible to form a physical barrier between the electrical connector of the charging plug and the user's finger without preventing the electrical contact between the electrical connector and the pins of the complementary electrical socket of the motor vehicle.

[0064] However, the present invention is not limited to the devices and configurations described and shown herein, and the present invention also extends to any equivalent devices or configurations and any technically feasible combinations of such devices.

Claims

1. A charging plug (1) for a motor vehicle, the charging plug comprising a plug fitting (2) having a connection side (4), an interface side (6) and at least one cylindrical cavity (12) which extends mainly in the longitudinal direction and passes through the plug fitting (2) from the connection side (4) to the interface side (6), the charging plug (1) comprising a retaining cylinder (14) disposed in the cylindrical cavity (12) and an electrical connector (16) disposed in the retaining cylinder (14), an end (20) of the electrical connector (16) being adjacent to the connection side (4), the charging plug (1) comprising an electric shock protector (30) which is associated with the end (20) of the electrical connector (16) and comprises a peripheral part (32) and a diaphragm (34), the electric shock protector (30) being configured to have a protection position (44) and a connection position (46), in the protection position, the diaphragm (34) is substantially flat, and in the connection position, the diaphragm (34) is deformed towards the interior (48) of the retaining cylinder (14).

2. The charging plug (1) according to the previous claim, wherein, The electric shock protector (30) is disposed in the longitudinal direction between the retaining cylinder (14) and a wall (31) of the cylindrical cavity (12) facing the end (20) of the electrical connector (16).

3. The charging plug (1) according to claim 1, wherein, The electric shock protector (30) and the retaining cylinder (14) form a one-piece assembly.

4. The charging plug according to any one of the preceding claims, wherein, The electrical connector (16) has a tubular shape with an inner face (26) and an outer face (24), the inner face (26) being provided with bosses (28) which are configured to contact pins (17) of a charger, the bosses (28) being disposed at a distance from the end (20) associated with the electric shock protector (30).

5. The charging plug (1) according to the preceding claim, wherein, In the connection position (46), the diaphragm (34) is at a distance from the bosses (28).

6. The charging plug (1) according to the previous claim, wherein, The diaphragm (34) comprises slits (42) which are configured to deform when the pins (17) of the charger pass through.

7. The charging plug according to the previous claim, wherein, The diaphragm (34) comprises a central opening (40), and the slits (42) extend from the central opening (40) in a star shape.

8. The charging plug (1) according to the preceding claim, wherein, The slits (42) widen as they extend away from the central opening (40).

9. The charging plug (1) according to claim 7, wherein, The slits (42) have a constant width as they extend away from the central opening (40).

10. The charging plug according to any one of the preceding claims, wherein, The diaphragm (34) is made of rubber.

11. The charging plug (1) according to any one of the preceding claims, comprising a plurality of retaining cylinders (14), each of the plurality of retaining cylinders accommodating an electrical connector (16), each retaining cylinder (14) being connected on the interface side (6) to at least one other retaining cylinder (14) by a connecting tab (18).

12. The charging plug (1) according to the previous claim, wherein, The connecting tab (18) extends in a slot on the interface side (6).

13. A method for assembling the charging plug (1) according to any one of the preceding claims in combination with claim 2, the method comprising the steps of inserting the electric shock protector (30) into the cylindrical cavity (12) of the plug fitting (2), inserting the retaining cylinder (14) into the cylindrical cavity (12), and a clamping step during which the electric shock protector (30) is pressed against the wall (31) of the cylindrical cavity (12) by the retaining cylinder (14).

14. A method for assembling the charging plug (1) according to any one of claims 1 to 12 in combination with claim 3, the method comprising the step of overmolding the electric shock protector (30) and the retaining cylinder (14), and the step of inserting the assembly formed by the retaining cylinder (14) and the electric shock protector (30) into the cylindrical cavity (12) of the plug fitting (2).

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