FR2606450A1 - ELECTRICALLY ACTUATED LOCK FOR MOUNTING ON MOTOR VEHICLES - Google Patents

Abstract

THIS LOCK 1 WITH ELECTRICAL ACTION, INCLUDES A CONTROL CAM 30 ACTUATED BY AN ELECTRIC MOTOR 6 AND SUITABLE TO MOVE A FORK 33 WHICH CAN ROTATE AROUND A FIXED JOINT 42, FROM A PARTIALLY CLOSED POSITION TO A CLOSED POSITION TOTAL, AND TO COMMAND IN THE SAME DIRECTION OF ROTATION THE OPENING LINKAGES 55 OF LOCK 1 AND, AT THE SAME TIME, THE PROGRESSIVE RETURN OF THE FORK 33 FROM ITS TOTALLY CLOSED POSITION TO THE OPENING POSITION; THE LOCK 1 ALSO CONSISTS OF A LEVER 81 WHICH RELEASES THE CONTROL CAM 30 FROM THE FORK 33 AND THE OPENING LINKS 55 TO ALLOW THE LOCK 1 TO BE ACTUATED MANUALLY IN THE EVENT OF A FAILURE OF THE ELECTRICAL SYSTEM.

Description

Electrically operated lock for mounting on vehicles

  The present invention relates to a lock

  electrically actuated for motor vehicles

  particularly on the doors of these vehicles.

  The problem of comfort inside a vehicle

  automobile is related to a variety of factors, including

  sound insulation is important.

primordial importance.

  Much of the noise that can be heard

  It is known that the pressure exerted by the peripheral seals of the doors, when they are closed, is a very influential parameter; double or triple pressures of the current pressures

  would be preferable to obtain a greater reduction

  the entrance of external noise in the habitable

  as well as a greater reduction of fluidodyna-

  air that are likely to compromise the proper functioning of joints, especially at high speeds. Such high loads are incompatible

  with traditional mechanical locks, especially

  what it would be very difficult to get the closure of

  these locks by simply slamming the door.

  Known locks are also known

  in which cinematic mechanisms

  appropriate, controlled by an electric motor, determine the total closure of the lock from the bearing position of the door. These locks must also retain a maneuverability

  mechanical failure of the electrical installation

than.

  The locks of the type that was briefly de-

  written above which are already known present some

  disadvantages. First, they are usually

  early complicated and expensive; in addition, although it is obtained by an electric control, the opening occurs abruptly, either because of the presence, inside the lock, of elastic means which are intended to stabilize the closed position either because of the elastic reaction of the door seals, a reaction which causes a sudden separation of the door relative to the body; finally, emergency mechanical actuation requires efforts

  more important than those of a traditional mechanical lock.

  because we have to overcome the resistance forces

  tes which are introduced by the kinematic chain which connects the motor means to the actuator means of the lock. The object of the present invention is to provide an electrically actuated lock intended to be

  mounted on motor vehicles and which is

  disadvantages of locks of the known type and

  which have been listed above.

  This object is achieved by the present invention in that it relates to an actuated lock

  intended to be mounted on self-propelled

mobile phones and of the type that includes:

  a fork that can turn around an ar-

  and has a cavity that can cooperate

  with a fixed bolt secured to a fixed part of the vehicle

  the automobile, between a first position, partial closure, and a second position, fully closing a lock adapted to maintain said fork in one of said closed positions;

  levered opening means suitable for cooperating with

  with the said lock against elastic means

c; and

  an electric motor that drives, through the

  a first gear means for controlling the opening and closing of said lock, and second cam means cooperating with switch means of the power supply of said electric motor; characterized in that said first means

  cams control said fork in a rotational direction

  by moving it from said first position, partial closure, to said second position,

  total closure, and order in the same direction

  actuation of said opening means to the

  and the gradual return of the said range of

  said position of total closure to a position of

  Verture; said first cam means disengageable with said fork and with said

  leverage opening means by means of deactivating means

  mechanically actuated coupling.

  To better understand the invention, it is

  In the following, a preferred embodiment will be described with reference to the accompanying drawings, in which: FIG. 1 is a sectional view, taken according to FIG.

  a trace plane I-I of FIG. 2, a lock made

according to the present invention;

  FIG. 2 is an elevational view of the ser-

Figure 1;

  FIG. 3 is an elevational view of a

tail of Figure 1;

  Figures 4a, 4b show in detail

  some of the details in Figures 2 and 3 in a first

  first configuration of operation; Figures 5a, 5b illustrate the same details of Figures 4a, 4b in a second configuration of operation; Figures 6a, 6b illustrate the same details of Figures 4a, 4b in a third configuration of operation;

  FIGS. 7a, 7b, 7c represent certain

  tails of Figure 2, in sequence, during a first maneuver;

  Figures 8a, 8b, 8c show some

  tails of Figure 2, in sequence, during a second maneuver; Figures 9a, 9b illustrate the same details

  that Figure 8a, in sequence, during a third

  noeuvre; Figure 9c shows a detail of Figure 1, in another operating configuration; Figure 10 is a section taken along an X-X trace plane of Figure 2; Figure 11 is a section taken along a trace plane XI-XI of Figure 2; Figure 12 is a section taken along a trace plane XII-XII of Figure 2; Figure 13 is a section taken along a trace plane XIII-XIII of Figure 2; and FIG. 14 is a section taken along a plane

trace XIV-XIV of Figure 2.

  Reference will now be made in particular to FIG. 1, which has been designated as a whole by

  reference 1 an electrically actuated lock

according to the invention.

  The lock 1 comprises an outer casing

  loppant 2, intended to be fixed to a carcass 3 (represented

  partially felt), for example to the carcass of a motor vehicle door. In particular, the

  outer body 2 is of the two-piece type and

  takes a first box 4 which contains control and control organs and is arranged inside

  of said carcass 3, and a second casing 5, which

  closes actuating organs and which stands out from the

inside the carcass 3.

  DaDs the first boot 4, is housed an engine

  connected to a reducing group 7. In particular

  link, an output shaft 6a of the motor 6 is provided with a threaded portion 8, which constitutes a worm

  which meshes with a primary wheel 9 belonging to a

  10. As this is clear from FIG. 3, the driving gear 10 is engaged by means of its secondary wheel 11 with a wheel

12 of a driven gear 13.

  This driven gear 13, which is tubular in shape,

  re, has at its end which is opposite to the aforesaid wheel 12, a projection 14 forming a cam, an outer profile 15 actuates the desired way, and

  as described in detail in the following, two half

cross-switches 16, 17.

  The driven gear 13 further has a cavity

  axial through 18 which has a quadrant section

  rounded edges in part 19, section

  which extends over almost the entire axial length of the

  conducted graining 13, on the side of the wheel 12, and a cylindrical section in its opposite end portion 20, on the side of the cam protrusion 14. These portions 19, 20 of the cavity 18 are separated by an annular projection 21; the cylindrical portion 20 cooperates with a support shaft 22

  carried by a wall 4a of the casing 4.

  A guide pin 23, of outside diameter,

  equal to the inner diameter of said protrusion

  21, is supported respectively by its two former

  tremities by this annular projection 21 and a hole 24 of a wall 4b of the casing 4, which faces the wall 4a above, and to which it is fixed by deformation

  plastic of his collar 25.

  A screw 26, screwed in front position in the guiding axis 23, clamps the casing 5 on the casing

  4, with interposition of the carcass 3.

  On the guide shaft 23, is slidably mounted

  a control element 27, essentially tubular in shape

  1, which comprises an end portion 28 having an outer profile substantially identical to the inner profile of the driven gear 13 and which establishes therewith a

  sliding prismatic coupling, a hinged cap

  which is protruding in a radial direction

  the intermediate region of the guide axis 23, and a control cam 30 which. protrudes in a radial direction on the end of the guide pin 23, which is opposite of said end portion 28. A coil spring 31, mounted outside the end portion 28 and compressed in the direction axial between said driven gear 23 and the inner cavity of the hemispherical cap 29, stabilizes a position of the control element 27 (to the right in FIG. 1) in which the control cam 30 is in abutment against an axial abutment 32, of annular shape, formed on the guiding axis 23, and can cooperate with kinematic elements of the lock 1 which will be

  described in detail below, with regard to the differences

  your figures, which represent the different configurations

operating conditions.

  In FIG. 4a, there is shown in their

  in which the lock 1 is open, an oven

  chette 33, adapted to receive in its housing conca-

  34, a bolt 35, of substantially cylindrical shape and integral with a post of the carcass of a vehicle, and a lock 36 adapted to lock said fork 33 in

a closed position.

  As this is clearly visible on the

  1, the latch 36 is hinged to the aforesaid screw 26 which is fixed in front position in the guide axis 23. More particularly, the lock 36 is locked in

  an annular housing 37 formed in an anti-

  friction 38; this sleeve is engaged and can rotate on an inner sleeve 39, which is mounted between two walls 5a, 5b of the second casing 5 which are made and traversed axially by the screw 26, with a slight

radial clearance.

  The mounting of the fork 33 is made of

  completely analogous way. This range can

  around a hinge 42, shown in detail in Figure 10 and described below. An axis 43, mounted cantilevered in a hole 44 of the fork 33 by the discharge of its end 45 on the hole 44, protrudes from the fork 33 towards the control cam 30, whose profile is clearly visible on the figure

  4a, and is provided at its opposite end 46 with a

  contact let 47 able to cooperate with a first profile

  active 30a of the control cam 30.

  The roller 47 controls, via a

  lever 48 retained by a spring 49 which stabilizes its position

  another microswitch 50 for controlling the

6 (see Figure 4b).

  It is further observed that the range 33

  takes a first tooth and a second tooth, 51, 52, which internally define said concave housing 34

  which are capable of being attacked by a party

  53 of the lock 36, respectively in a position of

  partial closure and in a closed position to-

  tale, as described above.

  The control cam 30 comprises a second pro-

  active wire 30b (FIGS. 7a, 7b, 7c) constituted by the

  of a lobe 54 of the cam 30 and that it is suitable for

  The lever 55 comprises two arms 56, 57 which form between them an obtuse angle. The first

  arm 56 has, on one side, a protrusion 58 on the-

  what is the profile 30b of the control cam 30; the second arm 57 is connected by an axis 59 to an end of a rod 60 which slides vertically. The lever 55 also has, in an intermediate region, a slit 61, of elongate shape, in which is engaged and

  can slide an axis 62 which is part of said article

  42 of the fork 33. The rod 60 has a flat upper end 63, able to cooperate with a

  finger 64 that the lock 36 carries close to its end.

  mity, and it is recalled by a coil spring 65

  (in broken lines in Figure 13).

  In FIGS. 8c and 12, 70 has been indicated

  security lever that is articulated by one of its extremes

  mitiated on the outer casing of the lock 1, by means of an axis 71; this safety lever 70, of curved shape,

  present in an intermediate region, a slot 72 sen-

  sibly triangular in which is engaged and can

  slide an axis 73 integral with a rod 74. In use

  1, the safety lever 70 is connected by its lateral arm 75 and its end 76 which is the opposite

  axis 71, to linkages or cinematic mechanisms

  known and unrepresented

  the lever 70, from the inside and the outside of the vehicle

  the, for example, through the integrated handle

  the door or by means of the key of the outside

  laughing. A spring 77, of the bistable type, stabilizes by means of

  the two extreme positions (security in

  or out of action) of the safety lever 70.

  The rod 74 connects the axis 73 to an articula-

  multiple articulation 79, shown in detail in FIG. 12. This multiple articulation 79 comprises an axis 80

  on which are mounted rotary a lever of de-torque-

  81, a deflection lever 82 and the connecting rod 74

  ted. At its opposite end, the disengage lever

  81 is articulated on a joint 83 and, in its

  intermediate part, it comprises a curved edge 81a

  to cooperate with the outer surface of the spherical cap.

  29; the return lever 82 comprises two arms 84

  and 85, which form an acute angle between them and it is

  ticulé in the middle on the aforementioned guide axis 23. The

  first arm 84 is able to cooperate, by its lateral portion,

  86, with the finger 64 of the lock 36; a second

  85 is connected at its end to said hinge

  multiple 79; a helical spring 87 (FIG. 2) articulated on the casing 4 by one of its ends and

  on the arm 85 by the opposite end, recalls the-

  reference 82 in the opposite direction to that of the

guilles of a watch.

  A lever 89, intended to control the opening of the outside, is connected by one of its ends to

  the fixed hinge 83 while at its opposite end

  it is linked, in use, to the mechanisms

  known and not represented, which are

  born, for example by a handle or a key. In

  an intermediate region, the lever 89 includes a bracket

  90 hook-shaped which defines a housing 91 can

  to be attacked by the axis 73 carried by the rod 74.

  Another lever 92 for controlling the opening

  the inside (FIGS. 9a, 9b, 9c) is articulated on an axis 93 whose geometric axis is perpendicular to the guide axis 23. At one end 94 of the lever 90, are connected, in use, mechanisms kinematic

  known e. not shown, which are actuated, for example

  folded by a handle; another end 95 may cooperate

  with the arm 84 of the deflection lever 82.

  Figure 10 shows in detail the achievement

  The first bushing 100 is fixed, by plastic deformation of its annular end projection 101, to a cylindrical hole 102 of the wall a of the casing 5, this hole being provided with circumferential projections which serve anchoring sleeve 100; this

  first sleeve 100 is also fixed, by deforming

  the plastic collar of its collar 103 provided at the opposite end.

  placed in a conical hole 104 of the wall 5b of the same casing 5. The fork 33 is fixed on a second

  socket 105, fitted on the first and which can

  on it with reduced friction. This second

  the bushing 105 is locked in the axial direction

  wall 5b and an anti-friction washer 106 interpolated

  between the second socket 105 and the annular protrusion

  101 of the first bushing 100. A cylindrical housing

  108 is formed on the inner surface of the first bushing 100, on the side of the end annular projection

101.

  The axis 62, of which an intermediate portion 109 is

  attached to a wall 4b of the casing 4 by plastic deformation

  that, is engaged by its cylindrical end 110, in

  the slot 61 of the lever 55 and is retained in this slot

  by a washer 111 on which the cylindrical end

  drique 110 is repressed; the axis 62 is further engaged in the cylindrical housing 108 of the first bushing

  by its opposite cylindrical end 112 which

  pour a hole 113 made in the carcass 3. A screw

  114 is threaded through the first sleeve 100 and screws

  seated in a threaded axial hole 115 of the axis 62, of

  that the flared head 116 of this screw fits into

  a conical hole 104 of the wall 5b. A spring 117,

  rolled on the axis o2, stabilizes the position of the lever 55 shown in FIG. 7a, by acting on the lever

  and on the boot 4 by its opposite ends.

  In Figure 11, there is shown in detail the arrangement of the fixed hinge 83. In a way all

  analogous to what has been described in connection with

  42, a screw 118 threaded through a sleeve 119 which is fixed to the walls 5a, 5b at its ends,

  clamps an axis 120 secured to the wall 4b. On one end

  mite of the axis 120, articulate the lever 89, which serves to open the lock 1 from the outside, and the uncoupling lever 81, these levers being retained in the di-

  axial rection by a washer 121 on which the end

  the axis is repressed. A spring 122, which stabilizes

  the position of the lever 89 which is shown in Figure 8b, is disposed in a first annular groove 123 of the axis 120; in a second annular groove

  124, is housed the lever 48 for actuating the micro-inter-

  switch 50, which can turn in this groove as re-

  shown in Figures 4b, 5b, 6b.

  FIG. 13 shows the arrangement

  the rod 60; this rod 60 is guided in its movement

  translationally vertical by two parallel guide teeth 127, 128 which cooperate with two respective sliding housings 129, 130, formed on the wall 4b, and these teeth are disposed on opposite side edges of the rod 60, one close from the middle and the other

  near the lower end of the rod 60 (Figure 2).

  The axis 59 is engaged in a slot 131 of the rod 60;

  this slot 131 has the function of allowing a transla-

  vertically of the rod 60 while the axis 59 describes a circular path under the effect of the rotation

lever 55 about the axis 62.

  In FIG. 14, the section is shown in FIG.

  It is possible to see in particular the arm 84 of the deflection lever 82 and the upper end 63 of the rod 60, which are capable of cooperating with the finger 64 (shown in FIG. interrupted lines) of the lock 36. One can also see the control cam 30 and the wall 4b to which the guide pin 23 is fixed by plastic deformation of its

collar 25.

* The operation of lock 1 occurs

as following.

  When the lock is open (Figures 4a, 4b), the latch 36 is supported on the fork 33 by the back of its bent portion 53, under the action of elastic means 147 of known type. The fork 33 is further maintained in the open position, released from the bolt

  under the action of elastic means 148 of the type con-

  bare. Configuration of microswitches 16, 17, 50

  is likely to prohibit the power supply of the electric motor

6.

  Figures 5a, 5b illustrate a position of

  partial closure, called "first notch", which is

  holds by manually closing the door, and in the-

  the bolt 35 penetrates partially inside the concave housing 34 of the fork 33 and causes a rotation of this fork in the direction of the needles

  of a watch, of sufficient amplitude to make

  lock the latch 36 by snap action with the first tooth 51 of the fork 33; the rotation of the fork 33 and, consequently, that of the axis 43 which is integral therewith, determine, by means of this axis, a rotation of an end 139 of the lever 48

  and by means of another end 140, this lever provokes

  that the operation of the microswitch 50; this micro-in-

  interrupter 50 therefore gives the authorization for the closure

  electric lock and activates the electric motor.

6.

  The electric motor 6 rotates in the opposite direction of that of the clockwise, by

  through the gears 8 and 13, the com-

  Mande 27 and, in particular, the control cam 30;

  the latter acts, by its external profile 30a represented

  6a, on the axis 43 of the fork 33, and it rotates on the bolt to the total closed position of the lock 1, which is determined by the catch between the lock 36 and the second tooth 53

  of the range 33. It is observed that the position of

  total ture occurs at the right of a concave zone 136 of the profile 30a, which area is preceded by an arc of greater height 137; this action determines a small

  excess of the range 33 before closing

  re, in order to get a softer and safer commitment

lock 36 on the fork 33.

  The shutdown of the electric motor 6 in the closed position occurs under the effect of switching

  of the microswitch 16, which is actuated by a segment

  of the orofil 150 of the cam-shaped protrusion 14 of

  the driven gear 13, whose position at the end of

  closing work is shown in Figure 6b.

  The electrically operated opening maneuver

  Lock 1 occurs as follows. From the configuration shown in Figure 6a, the electric motor 6 is actuated in the direction of rotation which produces the closure, for example by a push button provided on the dashboard of the vehicle, or by a

  key, if one acts from outside the door. The the-

  55 is in the position shown in solid lines in FIG. 7a, in which one end of its arm 56 is in contact with the profile 30a. In

  this configuration, the axis 62 is at the extreme end

of the slot 61.

  Next (FIG. 7b), profile 30b comes into contact with

  tact with the protrusion 58 and the lever 55 rotates clockwise about the axis 62, against the action of the spring 117, pushing the

  stem 60 upward with his arm 57. Under the

  fet of the action of the rod 60 on the finger 64 of the lock

  36, there is an uprising and

  gressive lock 36 relative to the fork 33 (Figure c). When the opening cycle is complete, the

  electric motor 6 is switched off by the switch

  17, which is actuated by the cam protrusion 14,

  which is now again in the re-

shown in Figure 5b.

  It should be noted that during the opening

  re, the axis 43 is kept in contact with the profile 30a

  of the control cam 30, which thereby realizes

  a gradual and controlled opening of the furnace

lock 33 of the lock 1.

  The mechanically actuated opening maneuver

  that outside occurs as follows. The lever 89,

  which is stabilized by the spring 122 in its ex-

  very clockwise, has a brief empty stroke segment, as is clearly visible in Figure 8b, on which

  represented the extreme positions taken in this

  the idle stroke, an actuating element of the lever 89 which is schematized by a dashed circle 138 and which is actuated by an external push button

  provided on the door, for example, on the handle. Pen

  when empty, the lever 89, or the mechanisms

  linked to it, activates an interrup-

  electric motor (not shown) which determines the start of the electrically actuated opening cycle.

previously described.

  If this does not happen, as a result of

  In the case of the electrical installation, the opening can be obtained mechanically by pushing the external push button further, which further moves the element 118 and, consequently, the lever 89, which moves the axis 73 thanks to its hook-shaped tab 90, as shown in FIG. 8b; this displacement is transmitted by the link 74 secured to the axis 73, to the multiple articulation 79 and, consequently, to the lever

  82. The latter turns in the direction of the

  the watch against the action of the spring 87 and causes the release of the lock 36 relative to the fork 33 by acting on the finger 64 of the lock by the arm 84. In Figure 8a, there is shown the situation in which the safety lever 70 is activated; a

  rotation of the safety lever 70 in the direction of the

  the guilles of a watch around the axis 71 causes the

  of the shaft 73 relative to the housing 91 defined by the hook-shaped tab 90 of the lever 89, so that a possible actuation of the lever 89 (interrupting line)

  stinks) has no effect because it is not transmitted to the

  return lever 82 by the rod 74.

  In FIGS. 9a and 9b, there is shown

  opening act with mechanical actuation of the inte-

  the vehicle; a rotation of the lever 92 (representing

  FIG. 9c) about the axis 93 moves the arm 84 of the

  82 and, therefore, the finger 64 of the lock 36.

  As this is clearly represented on the

  FIG. 9c, the mechanically actuated opening maneuver

  that it is performed from the inside as well

  that from the outside, as described, determines the

  automatic coupling of the control cam 30 and, consequently, of the electric motor 6, with respect to the mechanical members actuated by the cam 30. In fact, both the lever 89 (opening from the outside) and the lever 92 (opening from the inside) determine a

  rotation of the return lever 82 around the guide axis

  ge 23 and, therefore, a move (to the right

  in FIGS. 8c and 9b) of the multiple articulation 79.

  This displacement determines a rotation of the disabling lever

  coupling 81, connected to the multiple joint 79,

  turn of the fixed hinge 83 (in the direction of the

  the ones of a clock in FIGS. 8c and 9b); the lever

  uncoupling 81 acts in a sensitive direction.

  radially, by its curved edge 81a, on the outer surface of the aforementioned hemispherical cap 29 of the control element 27, and this cap retracts on the guide pin 23 against the action of the spring

  31; in this way, the control cam 30 is disengaged

  plea of the axis 43 of the fork 33 and the projection 58

lever 55.

  This uncoupling is then maintained by the

  lever 55 when the lever 89 or 92 is released. Of the-

  placement of the cam 30 removes the arm 56 of the lever 55, its support on the profile 30a, and the lever rotates about the axis 59 in the opposite direction of that of the clockwise, under the action of the spring 117 , until the axis 62 occupies the opposite end of the slot 61

stopping the lever.

  Lever 55 thus has the indi-

  7a (dashed position) and in FIG. 9c, in a position where one end

  arm 56 is placed facing the cam 30 so as to prevent

  dear this cam to go back under the action of

spring 31.

  An examination of the characteristics of the lock

  according to the invention and described above makes

  clearly demonstrate the advantages it

  hold. First, the profile 30a of the control cam

  30 has a shape suitable for allowing the controlled electric opening of the lock 1 since it continues to guide the axis 43 of the fork, even when the latter has been left free by the lock 36. In addition,

  this profile 30a is variable so as to impose on the

  6 relatively resistant and sensitive

  to compensate for the increased compressive force of the door seals, which occurs substantially in the last part of the

  closing movement of the lock. The actuation

  canic, which is possible even in the case of failure of the electrical installation, as we saw above, occurs without additional efforts because, after switching off the engine 6, the lock 1 behaves

  exactly like a traditional mechanical lock.

  In addition, the cost of the lock 1 is limited since the mechanical part has substantially the same complexity as a traditional mechanical, while the part

  electricity has the cost of a con-

  traditional electric door damnation. The provision

  sition of the rotational joints of the fork and the lock which is shown, in which the assembly is carried out by means of the pairs of bushings described

  above, reduces friction and, as a result

  the forces required to activate the service

rure.

  It is finally obvious that we can

  ter different modifications and variants to the lock 1 described above without departing from the scope of protection of the present invention. In particular, the

  outer wrapping body 2 may be of the mono type

  block. Similarly, the lock described can be ordered

  in a classic way by a small electronic power plant

  only with the selection of the different control functions

  of, according to what will be most convenient.

RE V E N D I C A T ION S

  1 - Electrically operated lock for motor vehicles, of the type which comprises:

  a fork that can turn around an ar-

  and has a cavity engageable with a fixed bolt integral with a fixed part of the vehicle, between a first position, partial closure, and a second position, total closure; a lock adapted to maintain said fork in one of said closed positions;

  lever opening means suitable for cooperating with

  with the said lock against elastic means

c; and

  an electric motor that drives, through the

  a speed reducing group, first cam means for controlling the opening and closing of the lock, and second cam means

  cooperating with switchgear

  electrical power of said motor; characterized in that said first cam means (30) controls said fork (33) in a

  direction of rotation, by passing it from

  first position, of partial closure, at the second

  position, of total closure, and control in the same direction of rotation, the actuation of said means

  leveraged opening (55) and the gradual return of

  said fork (33) of said closed position to-

  to an open position: said first cam means (30) can be out of engagement with

  said fork (33) and with said opening means

  lever (55) using means of uncoupling

(81) mechanically actuated.

  2 - Lock according to claim 1, characterized

  characterized in that said first cam means (30) are integral with a tubular control member

  (27) which is integral in rotation with the gear of

  tie (13) of said reducing group (7).

  3 - Lock according to claim 2, characterized

  characterized in that said control element (27) is mounted to slide axially and angularly on an axis of

guiding (23).

  4 - Lock according to claim 2 or the re-

  claim 3, characterized in that said element of

  control (27) comprises operating means (29)

  cooperate with said uncoupling means (81).

  - Lock according to one of claims 2 to

  4, characterized in that said means for uncoupling

  (81) cause an axial translation of the ele-

  control system (27) against the reaction of

  elastic means (31), translation under the effect of

  which said first cam control means (30) are disengaged from said fork (33) and said means

lever opening (55).

  6 - Lock according to claim 4 or the re-

  5, characterized in that said means for

  uncoupling includes a lever (81) which can

  around a fixed hinge (83) having a pa-

  aligns with the axis of said control member (27); said

  lever (81) comprising a curved portion (81a) cooperating with

  re with a corresponding hemispherical profile of said

  maneuvering means (29) so that a movement

  radial approximation of said lever (81)

  sliding of said hemispherical profile on

  part (81a), and the consecutive axial translation of

said control element (27).

  7 - Lock according to one of the preceding claims

  characterized in that said means for opening

  re comprise a return lever (82) whose first arm (84) is adapted to cooperate with a finger (64) carried by said latch (36) to release said latch (36) of

said fork (33).

  8 - Lock according to claim 7, characterized

  characterized in that said return lever (82) is hinged to said guide pin (23) of said control member (27).

  9 - lock according to claim 7 or the re-

  claim 8, characterized in that said lever opening means comprise an additional lever (55); a first arm (57) of said additional lever (55) being able to cooperate with said first means

  cam (30); a second arm (57) of said lever

  (55) being able to control the movement of said

  finger (64) which releases said latch (36).

  Lock according to claim 9, characterized

  in that said second arm (57) of said lever

  tional mechanism (55) activates a movable rod (60)

  tion adapted to cooperate with said finger (64) of said latch (36), said second arm (57) being connected to said rod

(60) by means of an axis (59).

  11 - Lock according to claim 10, characterized

  in that said additional lever (55) has a central slot (60) in which engages and can

  sliding a fixed axis (62) which occupies a first ex-

  trestle in the rest position, said lever

  (55) rotating about said fixed axis (62) under the ef-

  a thrust exerted by said first cam means (30) to actuate said movable rod (60) by

translation.

  12 - Lock according to claim 11, characterized

  in that said additional lever (55) is loaded

  by elastic means (117) which rotate it

  turn of said axis (59), from said rest position to a

  position in which said additional lever (55) co-operates

  father with said control member (27) for maintaining said cam means (30) disengaged from said fork (33) when said uncoupling means (81) is released.

  13 - Lock according to one of claims 7 to

  12, characterized in that said opening means to

  lever comprise a first control lever (89)

  linked by a link (74) to a second arm (85) of said

return lever (82).

  14 - Lock according to one of claims 7 to

  13, characterized in that said lever opening means comprise a second control lever (92)

  intended to cooperate with said first arm (84) of said

referral (82).

  15 - Lock according to one of claims 7 to

  14, characterized in that said return lever (82)

  is connected to said uncoupling lever (81) by way of

  that a rotation of the return lever (82) causes the

  disengaging said first cam means (30) by

  said fork (33) and said lever

nel (55).

  16 - Lock according to one of claims 13 to

  , characterized in that it comprises a lever for

  curity (70) able to release said link (74) of said

first control lever (89).

  17 - Lock according to one of the preceding claims

  dentes, characterized in that said first cam means (30) comprise a first active profile (30a) adapted to cooperate with an axis (43) carried by said fork

(33).

  18 - Lock according to one of claims 9 to

  17, characterized in that said first means

  me (30) comprise a second active profile (30b) suitable

  to cooperate with a protrusion (58) of said lever

nel (55).

  19 - Lock according to one of the preceding claims

  dentes, characterized in that said articulation (42)

  said fork (33) comprises an inner sleeve

  re (100) fixed to two walls (5a, 5b) of an outer casing

  interligne (5) of said lock (1) which face each other, an outer sleeve (105) rotatably mounted on said inner sleeve (100), integral with said fork (33) and axially locked between one of said walls (5b), and an anti-friction washer (106) disposed

  between said outer sleeve (105) and an annular projection

  nular (101) of said inner sleeve (100).

  Lock according to claim 19, characterized

  in that said latch (36) is locked in a

  annular sleeve (37) of a bushing (38), said bushing (38) being rotatably mounted on an inner bushing (39), which is fixed to said walls (5a, 5b) of said

outer casing (5).

  21 - Lock according to one of the preceding claims

  cedeentes, characterized in that said second

* cam means (14) came from one piece on the-

  said output gear (13) of said gearbox (7).