EP2795025B1 - Key having a retractable insert and corresponding deployment module - Google Patents

Description

The present invention relates to keys, particularly for a motor vehicle, whose body comprises a housing and whose part comprising the bit, called insert, is retractable into the housing.

The invention more particularly relates to a deployment module of the insert of a key and a key comprising such a module.

Key structures forming a box with a retractable mechanical insert, in which the insert is pivotally mounted between a rest position, in which the insert is retracted into a housing inside the housing, and a position of use in which the insert is deployed relative to the housing, have already been proposed.

Such articulation of the insert requires a deployment mechanism of the insert mounted in the housing.

• un bouton poussoir reçu axialement dans un logement associé de la demi-coquille supérieure et faisant saillie par rapport à cette demi-coquille supérieure pour être actionné par un utilisateur, ledit bouton poussoir étant relié à l'insert et comportant un moyen de blocage par rapport au boitier et permettant le blocage de l'insert en position de repos et en position d'utilisation, et
• un élément de rappel élastique de l'insert pour solliciter le dit insert en pivotement vers sa position d'utilisation lorsque le bouton poussoir est actionné.

International demand WO2010023294 shows such a mechanism. In particular, there is shown a deployment mechanism mounted between an upper half-shell forming a cover and a lower half-shell forming a housing bottom comprising:

• a push button axially received in an associated housing of the upper half-shell and projecting from the upper half-shell to be actuated by a user, said push button being connected to the insert and comprising a locking means relative to to the housing and allowing the locking of the insert in the rest position and in the position of use, and
• an elastic return element of the insert for biasing said insert pivotally towards its use position when the push button is actuated.

Another deployment module, according to the preamble of claim 1, is known from the document US 2009/0217722 A1 .

When the user actuates the push button, the connection between the push button and the insert is broken, which allows the latter to pivot to its position of use since nothing hinders its rotation under the effect of the rotational force applied to it by the elastic return element.

To return the insert to the rest position it is then sufficient for the user to operate the push button releasing the locking element and even the pivoting movements of the insert. The user must then print on the insert a force in opposition to that of the elastic return element, which tends to keep the insert in the use position.

In this kind of mechanism, the return element is generally provided with two ends. A first end is attached to the insert, said end inserted between two first parallel lips and a second end is attached to the push button, inserted between two second parallel lips.

This kind of assembly nevertheless requires the use of a return element having their first and second ends aligned on the same plane with a positioning tolerance between these ends of the order of plus or minus 5 °. This restriction therefore requires to have reminders whose specifications are more restrictive and therefore lead to additional costs.

One of the aims of the invention is therefore to at least partially overcome the disadvantages of the prior art and to provide a retractable insert key whose specifications are less restrictive.

• un insert monté pivotant autour d'un axe de pivotement (et comprenant un support de panneton et un panneton solidaire dudit support,
• un mécanisme de déploiement de l'insert monté dans ledit boîtier et comprenant :
  • un bouton poussoir reçu axialement dans un logement associé de la demi-coquille supérieure et faisant saillie par rapport à cette demi-coquille supérieure pour être actionné par un utilisateur, et
  • un élément de rappel élastique de l'insert dont une première extrémité est reliée à l'insert au niveau du support, pour solliciter le dit insert en pivotement vers une position d'utilisation lorsque le bouton poussoir est actionné, ledit élément de rappel étant fixé au bouton poussoir par une seconde extrémité,

caractérisé en ce que le support ou le bouton comporte deux ergots de maintien s'élevant parallèlement à l'axe de pivotement et positionnés en vis-à-vis et symétriquement par rapport audit axe de pivotement, lesdits ergots de maintien définissant de part et d'autre de l'axe de pivotement un espace de débattement angulaire de la première extrémité ou de la seconde extrémité de l'élément de rappel élastique selon un angle compris entre 10° et 90°.Thus, the object of the invention relates to an insert deployment module for a retractable insert key configured to be mounted in a housing of said key, comprising:

• an insert pivotally mounted about a pivot axis (and comprising a bit holder and a bit secured to said support,
• a mechanism for deploying the insert mounted in said housing and comprising:
  • a push button received axially in an associated housing of the upper half-shell and projecting from the upper half-shell to be actuated by a user, and
  • an elastic return element of the insert, a first end of which is connected to the insert at the level of the support, for biasing said insert pivotally towards a position of use when the push button is actuated, said return element being fixed at the push button by a second end,

characterized in that the support or the button comprises two holding lugs rising parallel to the pivot axis and positioned vis-a-vis and symmetrically with respect to said pivot axis, said holding lugs defining on both sides other of the pivot axis an angular displacement space of the first end or the second end of the elastic return element at an angle of between 10 ° and 90 °.

• un boîtier avec une demi-coquille supérieure formant couvercle et une demi-coquille inférieure formant fond de boîtier,
• un insert monté pivotant autour d'un axe de pivotement et comprenant un support de panneton et un panneton solidaire du support,
• un mécanisme de déploiement de l'insert monté dans ledit boîtier et comprenant :
  • un bouton poussoir reçu axialement dans un logement associé de la demi-coquille supérieure et faisant saillie par rapport à cette demi-coquille supérieure pour être actionné par un utilisateur, et
  • un élément de rappel élastique de l'insert dont une première extrémité est reliée à l'insert au niveau du support, pour solliciter le dit insert en pivotement vers une position d'utilisation lorsque le bouton poussoir est actionné, ledit élément de rappel étant fixé au bouton poussoir par une seconde extrémité,
  ledit support ou ledit bouton comportant deux ergots de maintien s'élevant parallèlement à l'axe de pivotement et positionnés en vis-à-vis et symétriquement par rapport audit axe de pivotement, lesdits ergots de maintien définissant de part et d'autre de l'axe de pivotement un espace de débattement angulaire de la première extrémité ou de la seconde extrémité de l'élément de rappel élastique, selon un angle compris entre 10° et 90°.

Selon un aspect de l'invention, les ergots de maintien ont une empreinte triangulaire et que l'angle de l'espace de débattement angulaire est de 90°. Selon un autre aspect de l'invention, le bouton poussoir présente un espace intérieur creux, à l'intérieur duquel loge la seconde extrémité de l'élément de rappel.The invention also relates to a key, in particular for a motor vehicle, comprising:

• a housing with an upper half-shell forming a lid and a lower half-shell forming a bottom of the housing,
• an insert pivotally mounted about a pivot axis and comprising a bit holder and a bit integral with the support,
• a mechanism for deploying the insert mounted in said housing and comprising:
  • a push button received axially in an associated housing of the upper half-shell and projecting from the upper half-shell to be actuated by a user, and
  • an elastic return element of the insert, a first end of which is connected to the insert at the level of the support, for biasing said insert pivotally towards a position of use when the push button is actuated, said return element being fixed at the push button by a second end,
  said support or said button having two holding lugs rising parallel to the pivot axis and positioned vis-a-vis and symmetrically with respect to said pivot axis, said holding lugs defining on either side of the pivot axis an angular displacement space of the first end or the second end of the elastic return element, at an angle of between 10 ° and 90 °.

According to one aspect of the invention, the holding lugs have a triangular imprint and the angle of the angular deflection space is 90 °. According to another aspect of the invention, the push button has a hollow interior space, inside which houses the second end of the return element.

According to another aspect of the invention, the support comprises a hollow pin on which is fixed the first end.

According to another aspect of the invention, the end of the biasing element opposite to that received by the holding pins, is received by two parallel lips formed in the bottom of the push button or on the support.

According to another aspect of the invention, the return element is a helical spring.

• la figure 1a représente une clé selon l'invention,
• la figure 1b représente la demi-coquille supérieure du boîtier de la clé de la figure 1a,
• la figure 1c représente une vue éclatée de la clé de la figure 1a,
• la figure 1d est une perspective de dessous de la figure 1c,
• la figure 2 est une vue plus en détail de la demi-coquille inférieure et du bouton poussoir de la clé de la figure 1a,
• la figure 3a représente en vue éclatée un bouton poussoir et un logement du bouton poussoir sur la demi coquille supérieure du boîtier de la clé de la figure 1a,
• la figure 3b est une vue du bouton poussoir monté dans le logement de la figure 3a,
• la figure 4a représente un bouton poussoir pour la clé de la figure 1a,
• la figure 4b est une vue de dessous du bouton poussoir de la figure 4a,
• la figure 5a représente un support de panneton pour la clé de la figure 1a,
• la figure 5b est une vue de dessus du support de panneton de la figure 5a,
• la figure 5c est une vue de côté du support de panneton de la figure 5a,
• la figure 5d est une vue en coupe du support de panneton de la figure 5c, et
• la figure 5e est une vue partiellement de côté du support de panneton de la figure 5a.

Other features and advantages of the invention will emerge more clearly on reading the following description, given by way of illustrative and nonlimiting example, and the appended drawings among which:

• the figure 1a represents a key according to the invention,
• the figure 1b represents the upper half-shell of the key housing of the figure 1a ,
• the figure 1c represents an exploded view of the key of the figure 1a ,
• the figure 1d is a perspective from below the figure 1c ,
• the figure 2 is a more detailed view of the lower half-shell and the push button of the key of the figure 1a ,
• the figure 3a is an exploded view of a push button and a housing of the push button on the upper half shell of the housing of the key of the figure 1a ,
• the figure 3b is a view of the push button mounted in the housing of the figure 3a ,
• the figure 4a represents a push button for the key to the figure 1a ,
• the figure 4b is a bottom view of the push button of the figure 4a ,
• the figure 5a represents a bit support for the key to the figure 1a ,
• the figure 5b is a top view of the bit support of the figure 5a ,
• the figure 5c is a side view of the bit support of the figure 5a ,
• the figure 5d is a sectional view of the bit support of the figure 5c , and
• the figure 5e is a partially side view of the bit support of the figure 5a .

• un boîtier 3 formant tête de clé,
• un insert 5,7 comprenant un support de panneton 5 et un panneton 7 solidaire du support 5, et
• un mécanisme de déploiement de l'insert 5,7 par rapport au boîtier 3 pour permettre un déplacement de l'insert 5, 7 entre :
  • une position de repos (figures 1c, 1d) dans laquelle l'insert 5,7 est escamoté dans le boîtier 3 dans un décrochement 9 prévu à l'intérieur du boîtier 3, par exemple selon une forme sensiblement en L correspondant à la forme de l'insert 5,7, et
  • une position d'utilisation (figure 1a), dans laquelle l'insert 5,7 est déployé par rapport au boîtier 3 pour pouvoir être inséré dans une serrure.

The key 1 represented on the Figures 1a to 1d has:

• a housing 3 forming a key head,
• an insert 5.7 comprising a bit support 5 and a bit 7 secured to the support 5, and
• a mechanism for deploying the insert 5.7 with respect to the housing 3 to enable the insert 5, 7 to move between:
  • a rest position ( figures 1c , 1d ) in which the insert 5,7 is retracted into the housing 3 in a recess 9 provided inside the housing 3, for example in a substantially L-shaped shape corresponding to the shape of the insert 5,7, and
  • a position of use ( figure 1a ), in which the insert 5.7 is deployed relative to the housing 3 to be inserted into a lock.

In the illustrated example, the housing 3 is made in two parts in the form of an upper half-shell 3a forming a lid and a lower half-shell 3b forming a bottom of the housing, these two half-shells 3a, 3b being able to be assembled for example by clipping. A seal (not shown) may be disposed between the two half-shells 3a, 3b to protect the interior of the housing 3 against the external environment, particularly against moisture or dust. One can still provide a decorative belt (not shown) disposed between the two half-shells 3a, 3b to embellish the assembly.

The key 1 can also combine a mechanical key and an electronic key. In this case, a printed circuit board (not shown) is disposed in the housing 3. This board carries the remote control electronic circuits for central locking / unlocking of the vehicle doors, and a transponder (not shown) for the anti-theft system of the vehicle and a battery (not shown) for the remote control function. This function of remote control is actuated by the operator by means of actuating buttons 11 provided on the upper half-shell 3a. A cover 13 may be disposed in the housing 3 to conceal the electrical or electronic components of the remote control housing 3.

In addition, the support 5 comprises two opposite ends 5a, 5b whose end 5a carries the bit 7. For this, one end 7a of the bit 7 may be fitted into a complementary housing (not shown) at the end. 5a of the support 5. The support assembly 5 / bit 7 is held fixed for example by a pin (not shown) passing through holes 17 formed on the support 5 and the bit 7. Of course, the blade 7 can be fixed to the support 5 by any other appropriate means.

• un bouton poussoir 19 reçu dans un logement 21 associé de la demi-coquille supérieure 3a et traversant un orifice 6 du support 5, le bouton poussoir 19 faisant saillie par rapport à la demi-coquille supérieure 3a de façon à être accessible à un utilisateur pour qu'il puisse actionner ce bouton poussoir 19 pour déployer l'insert 5,7, et
• un élément de rappel élastique 23 fixé par une première extrémité 23a à l'insert 5,7 et par une seconde extrémité 23b à un élément bloqué en rotation par rapport au boîtier 3, pour solliciter l'insert 5, 7 en pivotement vers la position d'utilisation lorsque le bouton poussoir 19 est actionné. Cet élément de rappel 23 est par exemple un ressort hélicoïdal de torsion.

Moreover, the deployment mechanism of the insert 5.7 comprises:

• a push button 19 received in an associated housing 21 of the upper half-shell 3a and passing through an orifice 6 of the support 5, the push button 19 projecting from the upper half-shell 3a so as to be accessible to a user for that it can actuate this push button 19 to deploy the insert 5.7, and
• an elastic return element 23 fixed by a first end 23a to the insert 5,7 and by a second end 23b to an element locked in rotation relative to the housing 3, to bias the insert 5, 7 pivotally towards the position of use when the push button 19 is actuated. This return element 23 is for example a helical torsion spring.

When the push button 19 is actuated by the user, the push button 19 is driven in axial translation along the longitudinal axis A within the support 5.

In order to prevent the push-button 19 from coming into abutment against the bottom wall of the support 5 at the end of the stroke, it is possible to provide a means for stopping the push-button 19. This stopping means may comprise a pin of FIG. stopping in the support 5 on which the push button 19 comes into contact at the end of travel, so that the translational movement of the push button 19 is stopped before the latter reaches the bottom wall of the support 5.

In the embodiment illustrated on the figures 1c , 1d and 2 , the support 5 has at its bottom a recess ( figure 1d ), for example according to a circular arc greater than 180 °, and the stop means comprises a stop pin 15 ( figures 1c and 2 ) coming from the lower half-shell 3b and fitting into the support 5 at this arc. This stop pad 15 further has a recess for defining a surface 15a of contact with the push button 19 at the end of the race. In addition, the push button 19 comprises means for locking the push button in rotation relative to the housing 3. This locking means forms a guide of the push button 19 in axial translation along the longitudinal axis A of the push button 19 and is realized in one piece with the push button 19.

Thus, it is the push button 19 which allows both to engage the deployment mechanism, to guide the push button 19 in translation, and to lock the pushbutton 19 in rotation.

In the illustrated example, this guide blocking means comprises at least one guide pin 25 which projects outwardly from the external surface of the pushbutton 19. It can be provided that the pushbutton 19 comprises two diametrically opposed guide pins 25 or three regularly distributed guide pins 25 for optimized translation guidance.

With reference to Figures 3a and 3b , each guide pin 25 cooperates with a corresponding notch 27 provided at the housing 21 on the upper half-shell 3a to guide the push button 19 in translation relative to the housing 3 along the axis A and to immobilize the push button 19 in rotation relative to the housing 3.

The return element 23 is fixed by its second end 23b to the push button 19 thus stable in rotation ( figure 1c ) without requiring an intermediate piece between the push button 19 and the return member 23 of the deployment mechanism.

For this purpose, as can be seen from the Figures 4a and 4b , the push button 19 has a hollow interior space 20 for housing the second end 23b of the return element 23.

More specifically, two parallel lips 29 are formed in the bottom of the push button 19 and extend towards the second end 23b of the return element 23 to receive this second end 23b. In this case, the second end 23b extends back inside the return element 23. The lips 29 thus make it possible to block the second end 23b with respect to the push button 19 and thus to block the second end 23b in rotation with respect to the upper half-shell 3a of the housing 3.

In addition, to bias the insert 5.7 in pivoting, the return element 23 is preferably fixed by its first end 23a to the support 5.

To do this, as can be seen from the Figures 5a, 5b , the support 5 may comprise a hollow pin 31 for housing the first end 23a of the return element 23 at the bottom wall 33 of the support 5. This pin 31 is for example connected to an inner side wall 35 of the support 5 by a radial bridge 37 and may be from material.

The support 5 may include, at the pin 31, a first axis B and a second axis B 'perpendicular to each other, the first axis B being parallel to the axis of the blade 7, and located on a plane perpendicular to the pivot axis A, the point of intersection of the first and second axes B and B 'being located on the axis A. Said support 5 may comprise two holding lugs 39, rising parallel to the axis pivoting A, and positioned on the second B 'vis-à-vis and symmetrical with respect to the first axis B and the pivot axis A. Between said holding lugs 39 is positioned the first end 23a of the return member 23 when mounting the key 1. Said holding pins 39 define on either side of the pivot axis A and the second axis B ', an angular clearance space 50 of the first end 23a according to a deflection angle of between 10 ° and 90 °.

In the example presented by the figure 5b , the holding elements 39 have a triangular shape, with on either side of the pivot axis A, an angular clearance space 50 having an angle of 45 ° on each side of the first axis B, a total angle 90 ° deflection.

Due to these two angular clearance spaces 50, it is possible to use return elements 23 having a positioning tolerance between its two ends 23a and 23b at least equal to half of the deflection angle. For example, this positioning tolerance may be plus or minus 45 °, when the angular deflection spaces 50 have an angle of deflection of 90 °.

It is nevertheless possible to imagine another embodiment (not shown), where the holding lugs 39 are carried by the button 19 and where the lips 29 are positioned on the support 5, for example on the hollow pin 31. Thus the angular deflection 50 in this embodiment would be for the second end 23b.

In addition, as illustrated by Figures 5c, 5d , the pin 31 emerges with respect to the bottom wall 33 of the support 5. An orifice 41 is then provided ( figure 1c ) on the inner wall of the lower half-shell 3b at the recess 9 for the interlocking of the pin 31 when mounting the support 5 in the housing 3.

As previously described (see figures 1c , 1d ), the support 5 is open at its bottom in a circular arc, in which the stud 15 is introduced during assembly of the support 5 on the lower half-shell 3b. This circular arc is centered on the pivot axis A so that during the pivoting of the support 5, the stop pin 15 circulates in this arc until the radial bridge 37 abuts against this stud stop 15, so as to block the pivoting movement of the support 5.

In addition, for the pivoting guidance of the support 5, the support 5 may further comprise two guide fingers (not shown) on either side of the second end 5b, which, under the effect of the actuation of the push button 19, are respectively guided by a first guide groove 43a formed in the upper half-shell 3a and by a second guide groove 43b formed in the lower half-shell 3b (see Figures 1b and 1c ). These guide grooves 43a, 43b have a generally semicircular shape and are each delimited by two stops 45,47. Thus, when the guide fingers bear against the abutments 45, the insert 5, 7 is in the rest position, and when the guide fingers bear against the abutments 47, the insert 5, 7 is in the position of use.

Of course, any other means enabling pivotal guidance of the support 5 may be used.

Furthermore, the push button 19 and the support 5 respectively fixed to the return element 23, cooperate to maintain the insert 5,7 in the rest position.

For that, with reference to FIGS. 4a, 4b and 5b, 5th , the push button 19 comprises at least one holding projection 49 of the insert 5,7 in the rest position, and the support 5 comprises a flange 51. This flange 51 is open to allow the passage of the holding projection 49 and has a notch 53 cooperating with the holding projection 49, so that the holding projection 49 engages the notch 53 in the rest position and releases the notch 53 when the push button 19 is actuated, so as to allow the pivoting of the support 5.

The assembly comprising the support 5, the bit 7, the push button 19 and the return element 23, form a deployment module of the insert 5.7. This deployment module is assembled independently of the housing 3.

• on fixe l'extrémité 7a du panneton 7 à l'extrémité 5a du support 5,
• on introduit l'élément de rappel 23 à travers l'orifice 6 du support 5,
• on fixe la première extrémité 23a de l'élément de rappel 23 entre les ergots de maintien 39du pion creux 31 du support 5,
• on introduit le bouton poussoir 19 à travers l'orifice 6 et on positionne le bouton poussoir 19 de façon à présenter la saillie de maintien 49 du bouton poussoir 19 au dessus de l'ouverture de la collerette 51 du support 5,
• on fixe la seconde extrémité 23b de l'élément de rappel 23 dans les lèvres 29 dans l'espace intérieur 20 du bouton poussoir 19, et
• on introduit la saillie de maintien 49 dans l'ouverture de la collerette 51 du support 5 et on tourne le bouton poussoir 19 selon un angle prédéfini de sorte que la saillie de maintien 49 engage l'encoche 53 de la collerette 51 du support 5. L'angle prédéfini est par exemple 90° pour un montage quart de tour ou 180° pour un montage demi-tour.

The assembly of this deployment module includes the following steps (see figures 1c , 4a, 4b and 5a ):

• the end 7a of the blade 7 is fixed to the end 5a of the support 5,
• the return element 23 is introduced through the orifice 6 of the support 5,
• the first end 23a of the return element 23 is fixed between the holding pins 39 of the hollow pin 31 of the support 5,
• the pushbutton 19 is introduced through the orifice 6 and the pushbutton 19 is positioned so as to present the holding projection 49 of the pushbutton 19 above the opening of the collar 51 of the support 5,
• the second end 23b of the return element 23 is fixed in the lips 29 in the interior space 20 of the pushbutton 19, and
• the retaining projection 49 is introduced into the opening of the flange 51 of the support 5 and the push-button 19 is rotated by a predefined angle so that the retaining projection 49 engages the notch 53 of the flange 51 of the support 5. The predefined angle is, for example, 90 ° for a quarter turn or 180 ° for a half turn.

In addition, when the biasing member 23 is a helical torsion spring, the rotation of the push button 19 until the holding projection 49 engages the notch 53, makes it possible to pre-constrain the spring in a simple manner. torsion.

Of course, the order of certain steps of the assembly of this deployment module can be modified.

The deployment module thus assembled, it can be mounted in the housing 3. For this, we mount the support 5 on the lower half-shell 3b and place the upper half-shell 3a such that the push button 19 is received in the housing 21 of the upper half-shell 3a protruding from the housing 3. The two half-shells 3a, 3b are then fixed together.

Thus, when an operator desires to use the insert 5.7 and thereby pull it out with respect to the housing 3, he presses the push button 19 whose actuation releases the notch 53 of the support 5, which relaxes the return element 23.

Under the action of the return element 23, the support 5 pivots with respect to the housing 3, the guide fingers of the support 5 being guided by the guide grooves 43a, 43b provided on the housing 3.

Under the effect of the pivoting of the support 5, the blade 7 is disengaged from the recess 9 and then moves from its retracted position in the housing 3, to its deployed position relative to the housing 3 in which the bit 7 can be used, for example making an angle of 180 °.

This use position is reached when the guiding fingers of the support 5 are pressed against the stops 47 of the housing 3, which blocks any further movement.

Thus, it is clear that thanks to the clearance spaces between the holding lugs of the first end of the biasing element, it is possible to use return elements having a positioning tolerance between its two ends of between 5 ° and 45 °, which can reduce the constraints of the specifications and thus reduce production costs.

Claims (7)

1. Deployment module for an insert for a key (1) having a retractable insert designed to be mounted in a casing (3) of said key (1), having

   - an insert (5, 7) mounted in a pivotable manner about a pivot axis (A) and comprising a key-bit support (5) and a key bit (7) secured to said support (5),

   - an insert (5, 7) deployment mechanism mounted in said casing (3) and comprising:

   • a push button (19) housed axially in an associated housing (21) of the upper half-shell (3a) and protruding from this upper half-shell (3a) in order to be actuated by a user, and

   • an insert (5, 7) elastic return element (23) of which a first end (23a) is connected to the insert (5, 7) at the support (5), for urging said insert (5, 7) into a pivoting movement toward a use position when the push button (19) is actuated, said return element (23) being fixed to the push button (19) by a second end (23b),

   the support (5) or the button (19) having holding pegs (39) that rise parallel to the pivot axis (A) and being positioned in a manner facing one another and symmetrically with respect to said pivot axis (A), characterized in that said holding pegs (39) define, on either side of the pivot axis (A), a space (50) for angular travel of the first end (23a) or the second end (23a) of the elastic return element (23) at an angle of between 10° and 90°.
2. Key (1), in particular for a motor vehicle, having:

   - a casing (3) having an upper half-shell (3a) that forms a cover and a lower half-shell (3b) that forms a casing bottom,

   - an insert (5, 7) mounted in a pivotable manner about a pivot axis (A) and comprising a key-bit support (5) and a key bit (7) secured to the support (5), and

   - an insert (5, 7) deployment mechanism according to Claim 1.

   first end (23a) or the
   second end (23b) of the elastic return element (23) at an angle of between 10° and 90°.
3. Key according to the preceding claim, characterized in that the holding pegs (39) have a triangular footprint and in that the angle of the space for angular travel is 90°.
4. Key according to one of the preceding claims, characterized in that the push button (19) has a hollow internal space (20) inside which the second end (23b) of the return element (23) fits.
5. Key according to one of the preceding claims, characterized in that the support (5) has a hollow stud to which the first end (23a) is fixed.
6. Key according to Claims 4 and 5, characterized in that that end (23a or 23b) of the return element (23) that is opposite the one housed by the holding pegs (39) is housed by two parallel lips (29) that are formed in the bottom of the push button (19) or on the support (5).
7. Key according to one of the preceding claims, characterized in that the return element (23) is a helical spring.

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