FR2766866A1 - CLOSING DEVICE, PARTICULARLY A LOCK TO BE RECESSED INTO A WINDOW OF A WINDOW-HOLDER OR THE LIKE - Google Patents

Abstract

Lock to be fitted into a door leaf intended to operate a rod (5) mounted to slide on the edge of the leaf, comprising a flat flush-mounted box, a follower (14) mounted to rotate around a geometric axis orthogonal to the plane means of the housing, this follower comprising a hole (15) to be traversed by a drive rod of mating cross section controlled by a crutch (16) capable of driving the follower (14) in rotation, which drives a follower arm (17 ) which controls the sliding rod (5). The follower arm (17) is offset relative to the follower (14) so as to rotate around a point (B) more distant from the rod (5) than the center of rotation (A) of the follower (14), a means (21) being provided to drive the off-center follower arm (17) in rotation directly by the follower (14), without any intermediate part.

Description

CLOSING DEVICE, PARTICULARLY LOCK A

  RECESSED INTO A WINDOW WINDOW OR

SIMILAR.

  The invention relates to a closing device, in particular a lock, to be embedded in a door leaf,

window or window.

  A first aspect of the invention relates to a closure device intended for the operation of at least one rod slidingly mounted on the edge of the leaf, the rod carrying locking members, and which comprises: - a flat housing to be embedded - a follower mounted to rotate in the housing around a geometric axis orthogonal to the mean plane of the housing, this follower being able to be driven in rotation by a handle, in particular a stand, the follower being provided with a follower arm which controls the rod in sliding. In a closing device, in particular a lock, to be built in of this kind, the distance between the axis of the follower and a part, or headrest, secured to the housing applied against the edge of the leaf is of particular importance. This distance, called "lock entry" corresponds to the distance between the hole made in the leaf for the passage of the drive rod controlled by the crutch, and the door edge. The tendency is to reduce this distance. As a result, the entry "of the mortice lock must also be reduced by

example in a door.

  This creates a problem in obtaining sufficient rod displacement in order to ensure the closure of the leaf, in particular of the door. Indeed, the displacement of the rod depends. on the one hand, the effective length of the follower arm which attacks, at one end, the rod to transform a rotational movement into a translational movement, and, on the other hand, the angle of rotation of this arm of follower. The angle of rotation of the stand is generally imposed by

  the specifications and has a value close to 45.

  In a simple drive system, according to which the follower transmits the angular displacement of the stand to the follower arm, it is clear that a reduction in the effective radius of the follower arm results in a peripheral stroke for the same angle of rotation. of the end of the arm smaller and therefore a displacement

lower of the rod.

  In order to increase the amplitude of the rotation movement of the follower arm, while retaining an angle of movement of the crutch limited by the specifications, rotation amplification mechanisms involving pinions have been provided. Such

  mechanisms are expensive and take up space.

  The object of the invention is, above all, to provide a closing device, in particular a lock, of the kind defined above which allows, when the lock entry is small, to nevertheless obtain, at the end of the follower arm, a displacement sufficient to ensure proper sliding of the rod. This system must remain

  simple and economical construction with a minimum of parts.

  According to the invention, a closing device, in particular a lock, of the kind defined above is characterized in that the follower arm is off-center relative to the follower so as to rotate around a point further from the rod than the center of rotation of the follower, a means being provided for directly driving in rotation by the follower the offset follower arm, without intermediate piece. The active length of the follower arm is thus increased, which allows, despite a small lock entry, to obtain sufficient displacement at the end of the follower arm, with a minimum of

rooms.

  Advantageously, the means for driving the arm consists of a finger linked to the follower or to the follower arm, said finger being situated radially respectively outside the contour of a hub of the follower arm or the follower, and being housed in a recess of this follower arm hub or of the follower respectively, so as to drive the follower arm for the appropriate direction of rotation, by cooperating with an end stop of the recess, and to move freely in this recess, without driving the follower arm, for the reverse movement of the handle or stand. It should be noted that the closer the finger is to the axis of the follower, the greater the travel of the rod, given

  that the axis of the follower is between the finger and the rod.

  Preferably a large face of the lock housing comprises a sleeve, of axis orthogonal to the plane of the face, defining at least two off-center spans ensuring respectively the rotational guidance of the follower and of the follower arm hub around their

different centers of rotation.

  This sleeve may include a bore whose axis passes through the center of rotation of the follower and an outer surface constituted substantially by two half-cylinders of different diameters, but of common geometric axis passing through the center of rotation offset from the follower arm , the two half-cylinders connecting by two

  shoulders oriented substantially radially.

  The follower arm has, at its hub, a substantially semi-circular opening, of the same radius as that of the large cylindrical surface of the sleeve, the ends of the opening of the follower arm hub being connected by a curved crosspiece defining an inner concave arc of smaller radius, matching the semi-cylindrical surface of smaller radius of the sleeve; a shoulder is formed at each end of the curved crosspiece to

  abut against a conjugate shoulder of the sleeve.

  The follower has a circular cylindrical contour housed in the sleeve and a radial branch offset from the mean plane of the follower so as to span the cross member of the hub.

  follower so that the finger can enter the recess.

  Advantageously, the housing, in particular the plaster is made of plastic; the sleeve formed from two parts of cylindrical surfaces of different diameters is molded with the housing. Preferably the center of rotation of the tfouillot and the center

  of arm rotation are located on a line orthogonal to the rod.

  A second aspect of the invention relates to a device

  lock consisting of a latch bolt with oblique face.

  For such a lock, the invention in its second aspect aims to solve, in a simple and rapid manner, the adaptation to an assembly

  on a door opening to the right or to the left.

  We know in fact that for a lock with a latch bolt having a prismatic head with a single oblique face, the mounting of the bolt must be such that this oblique face is always the one which comes in

  contact with the fixed amount of the door at the time of closing.

  Depending on whether the door opens to the right or to the left, the lock must be configured accordingly and the latch bolt, with oblique face, must

to be returned from 180.

  The invention therefore also aims to provide a lock whose characteristics, taken independently or in combination with the characteristics defined above, allow a 180 ° turn of the latch bolt around a geometric axis orthogonal to the door edge, in order to transform

  quickly a right lock to a left lock or vice versa.

  According to this second aspect of the invention, a lock to be embedded in a door leaf or French window, comprising - a flat housing to be embedded, - a bolt slidably mounted in the housing, a rod constituting a bolt tail and an end piece drive engaged with a bolt control piece, this control piece ensuring, in the rest position, the retention of the bolt extended, and ensuring, when it is operated by a crutch, the erasure of the bolt against means elastic return, is characterized by the fact - that it includes a stop means, for the control part in the rest position, suitable for being erased from the outside of the housing, so that when this stop means is erased, the prismatic head of the bolt can come entirely out of the lock box, - and that the connection between the control piece and the bolt drive end is provided to allow, in response to a rotary movement of the bolt around the axis of the bolt tail, a release of the drive end relative to the control part, then, after a reversal of the bolt around said axis of the bolt tail or after a replacement of said bolt, to allow reclosing of the connection between the nozzle and the control part

  by a half-turn of the bolt around said axis of the bolt tail.

  Preferably, the bolt is a U-bolt whose head

  prismatic has an oblique face.

  The stop means advantageously consists of a tab linked to the housing and on which it is possible to act with a tool, from the outside of the housing, by at least one opening provided in the

wall of the lock housing.

  The tab can be secured to the plaster of the case.

  Advantageously, the plaster of the case is molded in

  plastic and the leg comes from molding with the plaster.

  The tab can pivot, in particular by elastic torsional deformation, about an axis orthogonal to the large face of the housing. Alternatively, the tab can be erased, in particular by elastic bending deformation, by a pivoting movement

  around an axis parallel to the large face of the case.

  Preferably, the tab in the rest position extends

  substantially parallel to the bolt tail.

  The control piece of the bolt is advantageously constituted by an arm articulated at one end on the housing, on the side of the bolt opposite the follower, and the arm comprises a slot in which is engaged the drive end of the bolt, the edges of the light adapted to cooperate with the drive end piece during the rotation of the latter about the geometric axis of the bolt tail being chamfered to facilitate disengagement and re-engagement by

rotation.

  The lug may include a boss engaged in an opening of the plaster in the rest position of the lug, and in abutment against an edge of the control piece of the bolt. This edge may include a notch in which the boss can be engaged by displacement

  of the tab, which allows the exit of the bolt.

  The bolt drive end piece advantageously consists of a plate whose mean plane is orthogonal to the geometric axis of the rod, this plate having parallel rectilinear edges guided and retained in rotation in the housing of the return spring of the bolt , a recess of sufficient diameter being provided at the end of the housing to allow, when the prismatic head of the bolt is

  out of the housing, a rotation of the nozzle in this recess.

  The closing device, in particular the lock, generally comprises a rod locking bolt whose movements are controlled, for example, by a bit of a cylinder of

  security, activated by an authorized key.

  Advantageously, the closure device or the lock comprises an indexing means secured to the housing suitable for cooperating with a conjugate means provided on the bolt. This prevents the bolt from moving outside the maneuvers imposed by the bit. The housing indexing means can be constituted by a pin, integral with the housing, engaged in a window provided in the bolt, this window comprising a median boss defining, on either side, two

  housings for the pin, corresponding to two indexed positions.

  The closing device or the lock may include a rod brake pressing against a boss on the rod. The rod brake can be constituted by an elastic means, in particular a tongue, integral with the housing and coming from molding with this housing when the latter is made of plastic. This rod brake acts as an anti-vibration for the rod and also allows

  rod position indexing.

  The invention consists, apart from the arrangements set out above, of a certain number of other arrangements which will be more explicitly discussed below in connection with the embodiments described with reference to the appended drawing, but which are not in no way limiting. In this drawing - Figure 1 is a diagram of a lock part according to the invention, showing in particular the follower, the follower arm and the rod; - Figure 2 is a diagram similar to Figure I for a different position of the parts - Figure 3 is an elevational view of a mortise lock, according to the invention, in the rest position, the tfoncet which closes the plaster the housing being removed - Figure 4 is a section along the line IV-IV of Figure 3; - Figure 5 is a partial view, similar to Figure 3, showing the erasure of a tab forming stop means; - Figure 6 shows, similarly to Figure 5, the lock while the latch bolt is out of the housing; Figure 7 is an enlarged elevational view of a deadbolt and an indexing pin - Figure 8 is an exploded perspective diagram, turned 900 relative to Figures 3, 5 and 6, of the bolt, the tail bolt and part of the control panel; - Figure 9 is a schematic section, enlarged, along the line IX-IX of Figure 8; - Figure 10 is a partial elevational view, in the rest position, of a variant of the built-in lock; - Figure 11 is a section along line XI-XI of Figure 10; FIG. 12 shows, similarly to FIG. 10, the lock in the bolt-out position:

  - Figure 13, finally, is a section along line XIII-

  XIII of Figure 12, illustrating the maneuver to get out

the latch bolt.

  The following description relates to a lock but

  applies to any closure device with a similar structure

  in particular a window lever.

  Referring to the drawings, in particular to FIG. 3, we

  can see a lock 1 to be embedded in a door or door leaf

  window. The lock has a flat case 2 made of a plaster

  3 closed, on a large side, with a wall 4 (fig.4).

  The lock is intended, in particular, for the operation of a rod 5 mounted sliding on the edge of the door leaf (not shown), which is located in a vertical plane orthogonal to the plane of the

figure 3.

  The rod 5 comprises a lower part 5a, which is lowered for locking, and an upper part 5b which is raised for locking. Locking devices, such as rollers (not

  shown) are provided on the rod 5.

  A U-bolt 6 is mounted in the housing 2, sliding perpendicular to the direction of the rod 5, that is to say horizontally. The latch bolt 6 comprises a prismatic head 7 with an oblique face 7a and a face 7b parallel to the large face of the plaster. The upper and lower horizontal faces of the head 7 comprise substantially semi-cylindrical guide grooves 7c extending parallel to the large face of the plaster. The bolt 6 passes through an opening made in a plate 8, or headrest, fixed against the door edge and fixed to the housing 1. The opening in the headrest 8 comprises a tail 8a engaging in the grooves 7c. The rod slides against the inner face of the headrest 8. The head 7 of the bolt is integral with a bolt rod or tail 9 extending horizontally in the housing and provided, at its inner end, with a nozzle 10, or bolt drive piece, extending perpendicular to the plane of FIGURE 3. The end piece 10 is constituted by a plate obtained from a circular disc cut along two parallel flats symmetrical with respect to the

  center and whose ends are connected by arcs of a circle.

  The end piece 10 is guided in translation by the inner wall of a housing 11 (fig.8) in which is mounted a compression spring i2 pushing the latch bolt 6 outwards. The end of the housing 1 located on the side of the head 7 has a recess 1 la of sufficient diameter to allow the rotation of the end piece 10 around the axis

rod geometry 9.

  The end piece 10 is engaged with a control part 13

  of the latch bolt which will be discussed later.

  A follower 14 is rotatably mounted, in the housing 2, around a geometric axis orthogonal to the mean plane of the housing, that is to say perpendicular to the plane of Figures 1, 2 and 3 d (the drawings. The follower 14 has a square hole 15 to be crossed by a drive rod of conjugate cross section controlled by a stand 16. A torsion spring 14r exerts an elastic return on the

follower.

  The stand 16 can execute, from the rest position, a movement in a first direction, in particular a

  lowering movement, to control the withdrawal of the half bolt

  tower 6 in the housing 1, by a conventional drive mechanism which will not be described in more detail. The stand 16 can also execute a movement in the opposite direction, that is to say a lifting movement as illustrated in FIG. 2, to rotate the nut 14 and control the movement of the rod 5 by

  through a follower arm 17.

  As shown in Figures 1 and 2, the follower arm 17 has a hub 18 surrounding the I'ouillot 14 and, at its end remote from the center of rotation, teeth 19 adapted to engage in corresponding openings 20, provided in the lower part Sa of the rod 5. These teeth 19 make it possible to directly drive the lower part 5a in vertical sliding in response to a movement of

rotation of the follower arm 17.

  Other teeth 19b are provided on the hub 18 to mesh with a toothed sector 19c articulated on an axis integral with the plaster. Sector 19c controls the positioning of the upper part 5b

  of the rod, in the opposite direction from the lower part 5a.

  The amplitude of the vertical displacement of the lower rod Sa, in response to a rotational movement of the follower arm 17 of determined angular amplitude, depends on the effective radius of the follower arm 17, that is to say the distance between the center of rotation of this

arms and teeth 19.

  The follower 14 rotates around a geometric axis intersecting the plane of Figure 1 at point A. The distance E between this point A and the outer face of the headrest 8 is the "lock entry" and corresponds to the distance between the hole in the door for the passage of the rod

  square drive of the follower 14, and the door edge.

  We want this distance E to be small.

  To prevent this small distance E from causing a significant reduction in the length of the effective radius of the follower arm 17, which would cause insufficient vertical displacement of the rod

  low Sa, the invention provides the arrangement set out below.

  I () As illustrated in FIGS. I and 2, the follower arm 17 is offset relative to the follower 14 so as to rotate around a point B further from the rod 5 than the center of rotation A of the follower, which comprises means 21 for directly driving the follower arm 17, without an intermediate part such as one or more pinions. The distance from B to the rod 5 is equal to E + Y. The means 21 is constituted by a finger line 22 secured to a radial branch 23 linked to the follower 14 with which it is secured. The finger 22 is situated radially outside the contour of the hub 18 of the follower arm and is housed in a recess 24 of this hub 18. The finger 22 can drive the follower arm 17 for the suitable direction of rotation of the crutch, namely the opposite clockwise direction according to the diagram of Figures 1 and 2, cooperating with an end stop of the recess 24. For a movement of the stand 16 from the rest position of Figure 1 in the direction clock, finger 21 moves

  freely in the recess 24 without driving the arm 17.

  This arm 17 comprises, at its hub 18, an opening 25 substantially semi-circular, centered on point B, the ends of this opening 25 being connected by a curved crosspiece 26 defining an internal concave arc 27, also centered on the point B, but of smaller radius than the major part of the opening 25. The radial branch 23 of the follower is offset to span the

  cross 26, so that the finger 22 enters the recess 24.

  The large face of the housing 2 formed by the bottom of the plaster panel 3 opposite the plug 4 comprises a sleeve 28 of axis orthogonal to the plane of the face, that is to say orthogonal to the plane of Figures 1 and 2. This sleeve 28 defines, by its outer surface, two bearing surfaces 29, 30 constituted by arcs of a circle, of different radius, centered on point B. The bearing surface 29 has a radius equal to that of the opening 25 and follows the inner circular surface of this opening, while the bearing 28 has a smaller radius equal to that of the concave arc 27. The two ends of the bearing 30 are connected to the ends of the bearing 29 by shoulders 31 in radial orientation, constituting end stops able to cooperate with the respective ends of the cross member 26. The angular extent of the bearing surface 29 is less than that of the opening 25 so that in the rest position of the stand 16, illustrated in FIG. 1 , an angul free space area I exists between the upper shoulder 31 and the upper end of the cross-piece 26. This angular space corresponds to the authorized travel towards the top of the stand 16, of approximately 45 as illustrated in FIG. 2. When the plaster 3 is made of plastic, the sleeve 28 is advantageously in one piece with the plaster 3 and

just molding with him.

  The sleeve 28 has a cylindrical central opening 32 of circular section, the center of which corresponds to point A. The follower 14 has a circular cylindrical outer contour of the same radius as the opening 32 in which it is housed and guided in rotation around the point A. Preferably the center of rotation A of the follower 14 and the center of rotation B of the follower arm 17 are located on a straight line

orthogonal to the rod 5.

  That said, the operation of the lock with regard to the control of the rod 5 by the stand 16 and the arm of

follower 17 is as follows.

  In the rest position of the stand 16, illustrated in FIG. 1, the finger 21 is located in the vicinity of the upper end of the recess 24, and the free space I is located between the upper radial shoulder 31 and the upper end of the cross member 26. The lower end of this cross member 26 abuts against the radial shoulder

31 lower.

  If the stand 16 is lowered, the finger 21 moves freely in the recess 24, without causing the follower arm 17 which remains in the position illustrated in FIG. 1. This movement of descent of the stand 16 is used, so classic, for

  order the withdrawal of the latch bolt 6.

  When the stand 16 is raised, as illustrated in FIG. 2, the follower 14 and the finger 21 rotate in the opposite clockwise direction and the finger 21 abutting against the upper end of

  the recess 24 rotates the follower arm 17.

  While the rotation of the follower 14 takes place around the center A distant only from E of the edge (ie door, the rotation of the follower arm 17 takes place around the center B distant from E + Y of the edge

door.

  The effective radius of the arm 17, determining the amplitude of the peripheral displacement of the teeth 19 for a given angle, is therefore greater than E. This results in a greater linear displacement of the rod 5 in its lower part Sa. At the end of the displacement , as visible in FIG. 2, the tooth 19 of the arm 17 which cooperates with the opening 20

  of the rod 5 is no longer the same as that of the starting position.

  In the position of maximum lifting of the stand 16 illustrated in FIG. 2, the free space I has moved between the shoulder

  lower radial 31 and the lower end of the cross-member 24.

  The upper end of the cross member 26 abuts against

  the upper radial shoulder 3 1.

  When the stand 16 is lowered from the position in FIG. 2, the finger 21 moves freely in the recess 24 without

  drive the arm 17 or the rod 5.

  When the stand 16 returns to the rest position of Figure 1, the finger 21 is then in abutment against the end

lower of the recess 24.

  If, from this position not shown in the drawings, the stand 16 is lowered, the rod 5 is then moved to bring it back to the rest position of FIG. 1,

  simultaneously with the withdrawal of the latch 6.

  The solution of the invention allows a reduction in the opening or closing movement of the lock with a compact mechanism and a minimum of parts, by directly driving the follower arm 17 by the follower 14, without any part

  intermediate such as one or more pinions.

  This compact mechanism can be integrated into several models of lock varying by their center E. In addition, the sleeve 28 constitutes a support part which ensures correct guiding in rotation of the follower 14 and of the follower arm 17. This mechanism designed on a base of space can advantageously be transplanted into

  any other larger case.

  We now consider the mounting problem posed by the half-turn bolt 6 with oblique face 7a which must always be the one coming into contact with the fixed part of the lock, located on the door jamb, at the time of closing. As there are doors opening to the right or left, by pulling or pushing, the locks must be

adapted to all needs.

  For this purpose, the invention aims to provide a lock which

  allows you to quickly and easily turn the latch 180.

  As can be seen in FIG. 3, the control part 13 of the bolt is constituted by a substantially vertical arm articulated, towards its upper end, on an axis 33 advantageously made of plastic material and molded with the plaster 3. The arm 13 s 'extends downwards beyond the bolt 9 and has a

  light 34 in which engages one end of the endpiece 10.

  The upper and lower horizontal edges of the light or window 34, as visible in FIG. 9, include a chamfer c to facilitate disengagement and re-engagement, by rotation around the geometric axis of the bolt tail 9, of the end piece 10 whose short sides are rounded. The edges v of the light 34 orthogonal to the axeometric of the bolt tail 9 do not have a pronounced chamfer to avoid any disengagement of the drive end piece 10 in response to a translation movement of the bolt parallel to the axis

  bolt tail geometry 9.

  The lock comprises a stop means R for the control part 13 in the rest position, this stop means being clean

  to be erased from the outside of the case.

  The stop means R is constituted by a tab 35 linked to the housing 2, and on which it is possible to act with a tool T from outside the housing by at least one opening 36 provided in a

  wall of the housing, in particular provided in the tfoncet 4.

  More specifically, in the case of a plaster 3 made of plastic, the tab 35 is itself made of material

  plastic and comes from molding with the plaster. Leg 35 is against

  angled and integral with the plaster; it has at its free end a

  boss 35a accessible through the opening 36 provided in the hole 4.

  According to the embodiment of Figures 3 and 4, the tab 35 extends substantially parallel to the bolt tail 9 and has a return

  at right angles 37 secured to the bottom of the plaster 3.

  The tab 35 can pivot, by elastic deformation of

  torsion, around an axis orthogonal to the large face of the plaster 3, that is

  i.e. an axis orthogonal to the plane of Figure 3.

  The boss 35a of the tab 35 forms a stop for an edge of the control piece 13, as visible in FIG. 3, and retains this piece in the rest position, the latch bolt 6 being

so went out normally.

  The edge of the tab 13 comprises, below the zone normally coming into abutment against the boss 35a. a notch 38 in which the boss 35a can be engaged by displacement of the lug using the tool T (FIG. 5), which allows the complete exit of the bolt 6, as illustrated in Figure 6. The lug 13 is retained by the

  boss 35a resting against the bottom of the notch 38.

  In this advanced position of the bolt tail 9, the end piece 10 is removed from the housing 11 of the spring 12 and is located at the level of the recess 1 1a of larger diameter allowing the end piece 10 to rotate around the tail geometry axis

bolt 9.

  It is then possible to rotate the bolt 6 of 180 around the axis of the bolt tail 9 in exercise, ant a torque on the head 7. The end of the nozzle 10, located in the light 34 , emerges from this light by cooperating with a chamfer c and the end

  opposite of the tip 10 is housed in the lumen 34 after the half

full head circumference 7.

  During the turning operation, the end piece 10 is released from the lumen 34 and the part 13 is no longer subjected to the thrust of the spring 12. The part 13 could tend, by its own weight, to return to the position of Figure 3, in which case the tip 10 would no longer be in front of the lumen 34 after the U-turn. This is prevented because the part 13 is kept in angular position due to the torsional stress of the tab 35 which causes a push of the upper face of the boss 35a against the upper edge of the notch 38. The friction thus created ensures the retaining the part 13. After turning the bolt 7 over, the assembly is replaced by pushing the bolt 6 inside the housing 1. The part 13, driven by the end piece 10, pivots in the opposite direction of clock around the axis 33 and the notch 38 emerges from the boss 35a. The tab 35 returns, by elasticity, to its normal position illustrated on the

figure 3.

  The reintroduction of the head profile 6 is carried out in

  engaging the grooves 7c in the empennage of the headrest 8.

  The foregoing explanations show how the lock works to ensure that the

turn around.

  Figures 10 to 13 show an alternative embodiment in which the identical elements or playing analogous roles are designated by the same reference numbers possibly preceded

from the number 1 of hundreds.

  The stop means R consists of a tab 135 molded with the plaster 3 of plastic. We find the boss 135a cooperating with an edge of the part 113 to retain it in the rest position. However, the edge of this piece 113 no longer has a notch. The erasing of the tab 135 is carried out by a pivoting movement around a vertical axis, parallel to the large face of the plaster 3, so that the boss 135a passes behind the part 113, according to the representation of the drawings , when

  exerts on the boss 135a a thrust using a tool T (fig.13).

  When the part 113 has thus been released from the stop constituted by the boss 135a, it performs an additional rotational movement, in the clockwise direction, ensuring the complete exit of

  the bolt head 7, as illustrated in FIG. 13.

  We can therefore perform the reversal movement of

  the head 7 by rotation of 180 around the axis of the bolt tail 9.

  When the end piece 10 has come out of the lumen 34, during the inversion operation, the part 113 is retained in angular position by the pressure exerted by the boss 135a against the face

  back of part 113 (fig. 12).

  As before, after turning the half bolt

  turn, just reintroduce the profile of the head 7 in the tail 8a of the headrest and push the bolt to replace the lock in its

  rest position and proceed with its installation.

  According to the invention, no specific part is necessary for turning the bolt. There is no special spring, no screws

  disassemble or other part to be removed.

  This results in a significant gain for the manufacturer in terms of production of parts and assembly time. In addition, the turning operation is facilitated, without risk of losing parts

by the user.

  The T tool to use is standard and common, for example

  screwdriver, point, knife, scissors.

  The production of plastic material, for example acetal, polyacetal, loaded or not, of the plaster 3 and the legs 35, 135 and other elements coming directly from molding, is particularly advantageous. The lock has in the lower part, in the embodiment

  envisaged, a deadbolt 39 for the locking of the rod 5.

  This bolt 39 can be moved in circular translation by a bit

  39a of a safety cylinder 39b controlled by a key.

  The bolt 39 has a window 40 (fig.7) having a median boss 41 defining on both sides a housing

indexing.

  A pin 42 secured to the large face of the plaster 3 is provided to penetrate this window, this pin having a certain elasticity. Preferably, when the plaster 3 is made of plastic, the pin 42 is also made of plastic and comes

molding with the plaster.

  The pin 42 is placed in one or the other of the housings located on either side of the boss 41 and crosses this boss by

  elastic deformation during the movement of the bolt.

  The pin 42 makes it possible to carry out an indexing of the bolt position, by exerting a slight elastic pressure force against the edge of the conjugate window and prevents the bolt from moving outside the

  maneuvers imposed by the bit of the safety cylinder.

  A rod brake 43 is further provided in the form of an elastic tongue 44 fixed to the plaster 3. When the latter is made of plastic, the tongue 44 is also made of plastic and comes from molding with the plaster. The tongue 44 has an L shape and has a branch substantially parallel to the rod 5 provided at its upper end with a clean bulge 44a

  to lean against and rub against a boss 45 on the rod 5.

  The rod brake 43 has an anti-vibration role for the rod 5. It also allows indexing of the position of the rod 5, for example by cooperation of the bulge 44a with a slight

hollow provided in boss 45.

Claims (12)

  1. Closing device, in particular lock, to be embedded in a window-door leaf or the like, intended for the operation of a rod (5) mounted sliding on the edge of the leaf, the rod carrying locking members, comprising - a flat box (2) to be built in; a nut (14) rotatably mounted in the housing around a geometric axis orthogonal to the mean plane of the housing, this nut can be rotated by a handle, in particular a stand (16), the nut (14) being provided with '' a follower arm (17) which controls the rod (5) in sliding, characterized in that the follower arm (17) is off-center relative to the follower (14) so as to rotate around a point (B) further from the rod (5) than the center of rotation (A) of the follower (14), a means (21) being provided for directly rotating the follower (14) the offset arm (17), without intermediate piece. 2. Device according to claim 1, characterized in that the means (21) for driving the follower arm comprises a finger (22) linked to the follower (14) or to the follower arm (17), the finger (22) being located radially, respectively, outside the contour of a hub (i8) of the follower arm or of the follower (14), and being housed in a recess (24) of this follower arm of the follower or of the follower ( 14) respectively, so as to drive the follower arm (17) for the appropriate direction of rotation by cooperating with an end stop of the recess (24), and to move freely in this recess (24), without drive the follower arm (17), to move in the direction   reverse of the stand controlling the bolt.   3. Device according to one of claims 1 or 2,   characterized by the fact that a large face of the lock housing comprises a sleeve (28) with an axis orthogonal to the plane of the face, defining at least two off-centered bearing surfaces (29, 30; 32) ensuring respectively the guiding in rotation of the touillot (.14) and the hub (18)   of follower arms around their different centers of rotation (A, B).   4. Device according to claim 3, characterized in that the sleeve (28) has a circular opening (32) constituting 19) the scope for guiding the follower (14), ouLverture whose axis passes through the center of rotation (A) of the follower, and an outer surface consisting substantially of two half-cylinders of different diameters (29, 30) of common geometric axis passing through the center of rotation (B) offset from the follower arm, the two half-cylinders connecting   by two shoulders (31) oriented substantially radially.   5. Device according to one of claims 3 or 4,   characterized by the fact that the follower arm (17) has at its hub (18) an opening (25) substantially semi-circular, of the same radius as that of the large cylindrical surface (29) of the sleeve (28), the ends of the opening (25) of the follower arm hub being connected by a curved crosspiece (26) defining an arc   inner concave of smaller radius following the semi-surface   cylindrical (30) of smaller radius of the sleeve (28).   6. Device according to claim 5, characterized in that a shoulder is formed at each end of the curved crosspiece (26) to abut against a con judued shoulder (31) of the sleeve (28).   7. Device according to claim 4, characterized in that the follower (14) has a circular cylindrical contour housed in the opening (32) of the sleeve (28), and a radial branch (23) offset so as to span the crosspiece (26) of the follower hub so that   the finger (22) can enter the recess (24).   8. Device according to one of claims 3 to 7,   characterized by the fact that the plaster is made of plastic and   that the sleeve (28) comes from molding with the plaster (3).   9. Device according to one of claims 1 to 8,   characterized in that the center of rotation (A) of the follower (14) and the center of rotation (B) of the arm (17) are located on a straight line orthogonal to the rod (5).   10. Device according to one of claims 1 to 9   comprising a bolt (39) for locking a rod (5), characterized in that it comprises an indexing means (42) integral with the housing (1) suitable for cooperating with a conjugate means (40, 41) provided on the bolt.   2 () 11. Device according to claim 10, characterized in that the indexing means comprises a pin (42) integral with the housing, in particular coming from molding with the plaster (3) made of plastic, and that the bolt (39) comprises a window (40) provided with a median boss (41), window in which the pin (42) is engaged.   12. Device according to one of claims I to i1,   characterized by the fact that it comprises a rod brake (43), in particular formed by a tongue (44) coming from molding with the plastic plaster, bearing against a boss (45) of the rod (5).