FR2985536A1 - Motorized lock for use in main door of building, has rod swivelly mounted between control wheel and half-turn bolt, and control wheel comprising support surface that swivelly actuates rod for retraction of half-turn bolt - Google Patents

Abstract

The lock (10) has a driving mechanism including a control wheel that is located in vicinity of a retractable half-turn bolt (18), and a driving unit that is electrically controllable for rotating the control wheel. The control wheel includes a support surface causing retraction of the half-turn bolt when the driving unit rotates the control wheel for driving locking bolts (22, 24, 26, 28) toward an unbolted position. A rod is swivelly mounted between the control wheel and the half-turn bolt. The support surface swivelly actuates the rod for retraction of the half-turn bolt.

Description

The present invention relates to a motorized lock intended in particular, but not exclusively, to the entrance doors of buildings.

A field of application envisaged is, for example, that of the entrance doors of individual houses. Also, known motorized locks allow to equip the free vertical border of such doors. They not only have a latch bolt to hold the door in the closed position, but also upper and lower locking bolts to provide better resistance to burglary. The latch bolt is beveled so that it can retract automatically when the door closes, and it is equipped with a return spring so as to resume its position of balance within a strike when the door is in the closed position. In addition, the lock comprises a drive device for precisely driving the locking bolts between a retracted position and a projecting position in which they engage in corresponding latches. This driving device comprises a gear wheel adapted to be rotated by a motor member and more precisely an electric motor by means of an endless screw, and two control rods, high and low, each comprising a toggle joint. . The two knee pads are hingedly connected to the toothed wheel and in diametrically opposite eccentric positions. The control rods respectively comprise control rods connected to the knee pads, and movable in translation to the right of the locking bolts so as to drive them themselves in translation by means of a return mechanism. Thus, when the toothed wheel is rotated by the electric motor, it drives the two knee pads in opposite directions from one another, and therefore the control rods in translation in the same corresponding directions to drive the bolts locking. In addition, the toothed wheel is provided with an eccentric pin adapted to cooperate with a finger installed on the latch bolt, when the toothed wheel is rotated, so as to simultaneously retract the latch bolt, when the locking bolts are themselves retracted. In particular, it will be possible to refer to the document FR 2 610 977 describing such a lock.

However, the lug is directly abutting against the finger when the control wheel is rotated, which requires a significant drive torque of the wheel to overcome the impact, and therefore a relatively powerful electric motor. Also, a problem that arises and that aims to solve the present invention, is to provide a motorized lock at an advantageous cost, in which the implementation of the locking bolts driving means and the latch bolt is optimized in order to reduce the necessary mechanical power and therefore the electrical means. For this purpose, the present convention proposes a motorized lock comprising, a retractable half-latch bolt, locking bolts located on either side of said latch bolt and a driving device for driving said latch bolts, said latch driving device comprising on the one hand a control wheel located in the vicinity of said latch bolt and an electrically controllable drive member for driving said rotary control wheel, and on the other hand control rods connecting said control wheel and said latch bolts, said control wheel having an eccentric bearing surface for causing said latch bolt to retract when said motor member drives said drive wheel to drive said latch bolts to an unlocked position. According to the invention, it further comprises a link pivotally mounted between said control wheel and said latch bolt; and said bearing surface of said control wheel is adapted to drive said link pivotally to cause retraction of said latch bolt. Thus, a feature of the invention lies in the implementation of a pivoting rod between the control wheel and the latch bolt so that, by leverage, the link can come to bear on the scope of support so that when turning, the control wheel causes the pivoting of the link, while the same rod comes to bear against the latch bolt to drive in translation. In this way, thanks to the leverage effect, the mechanical force involved is less important compared to a lock whose control wheel drives directly in translation the latch bolt. Therefore, the power of the electric motor necessary for the movement of the wheel can be reduced in comparison with the locks according to the prior art. According to a particularly advantageous embodiment of the invention, said control wheel comprises a disc having a peripheral driving edge and a guide ring integral in rotation with said disc and having an internal recess forming said bearing surface. Thus, thanks to the bearing surface formed inside the ring, or within the cylindrical space defined by the disc, the size of the control wheel is smaller compared to a wheel provided with a radially protruding lug. Preferably, the disc has helical teeth on its peripheral edge, able to cooperate with a worm as will be explained below in more detail. In addition, and according to a particularly advantageous embodiment of the invention, said internal recess extends in an arc between an end spaced apart from the center of rotation of said wheel and an end close to said center of rotation, so as to make converging said bearing surface towards said center of rotation. In this way, the bearing surface then forms a ramp with respect to the rod which makes it possible to rotate it gradually as the control wheel is rotated. Also, the impact energy between the control wheel and the rod is relatively small.

In addition, the lock advantageously comprises contactors located around said control wheel, and said guide ring has a peripheral edge and lugs projecting from said peripheral edge to be able to cooperate with said contactors. As will be explained below, the contactors can be used to electrically control the operation of the drive member and thus stop the control wheel when it is at the end of stroke in particular. Preferably, said link has two opposite ends adapted to cooperate respectively with said control wheel and said latch bolt, and a pivot axis located between said two opposite ends. The relative position of the pivot axis and opposite ends is chosen so as to minimize the mechanical forces and the power of the electric motor required.

In addition, one of said ends of said link adapted to cooperate with said control wheel has a first link pin extending back along said pivot axis. This link pin is preferably engaged inside the inner recess of the ring so as to bear on the bearing surface when the control wheel is rotated. It will be observed that the pivot axis of the rod is substantially parallel to the axis of rotation of the control wheel. In addition, and according to another embodiment of the invention that is particularly advantageous, the lock furthermore comprises, on the one hand, a mobile interstay device between a working position and a rest position, and on the other hand a mechanical member located between said control wheel and said stay to bring said stay in said rest position when said control wheel drives said locking bolts to said unlocked position. Thus, not only the control wheel retracts the locking bolts and the latch latch simultaneously, but moreover, it also allows to control the retraction of the stay. The latter is usually manually controlled when it is desired to open the door after having implemented it. Preferably, said mechanical member is pivotally mounted between said control wheel and said stay. In this way, and as for the aforementioned link, the mechanical energy supplied by the control wheel is more efficiently transmitted to the stay. The control wheel advantageously has an eccentric lug to cooperate with said mechanical member, so as to rotate it when the wheel is rotated.

Furthermore, said control rods comprise firstly, two control rods opposed to each other with respect to said latch bolt and movable in translation and, secondly, two kneepads mounted respectively hinged on said rods of control and on said control wheel. The mode of operation of the knee pads and control rods will be explained in greater detail in the remainder of the description. Other features and advantages of the invention will appear on reading the following description of a particular embodiment of the invention, given by way of indication but not limitation, with reference to the accompanying drawings in which: Figure 1 is a schematic perspective view of three quarters, showing a lock according to the invention on the inner side; Figure 2 is a schematic detail and front view showing the mechanism of the lock illustrated in Figure 1 in an intermediate state; Figure 3 is a schematic detail view in rear view showing elements of the mechanism shown in Figure 2 in the intermediate state; Figure 4 is a schematic detail view showing the mechanism shown in Figure 2 in an active state; and, Figures 5, 6 and 7 are schematic front views showing a detail of the mechanism of the lock shown in Figure 2 in three different angular positions corresponding to three states of the lock. Figure 1 illustrates a lock 10 according to the invention intended to be installed in the free edge of the leaf of an opening. It is here seen from the side of the interior on the left, for an opening of the door on the right. It comprises a longitudinal housing 12 having a front face 14 and a side edge 16 adapted to come opposite the amount of a frame. This housing shows a latch bolt 18 which protrudes from the side edge 16 and an actuating stand 20 on the front face 14 at the latch bolt 18. In addition, the lock 10 comprises two successive upper locking bolts, a first 22 and a second 24 flush in the side edge 16 above the latch bolt 18 and two successive lower locking bolts, a third 26 and a fourth 28 also flush in the side edge 16 below the latch bolt 18. In addition, the lock 10 has on the front face 14 above the actuation stand 20, a control keyboard 30 and a display 32 connected to a microcontroller not shown, and below, an actuator 34 of a cracker here retracted. Referring to Figure 2 showing the lock mechanism located inside the housing 12 at the actuating jack 20 between the first bolt 22 and the third locking bolt 26. This figure shows the bolt half -turn 18 comprising a beveled head 34 and a bolt shank 36, mounted movably in translation inside the housing. The bolt tail 36 has a tongue 38 folded substantially perpendicularly towards the front of the Figure, while the actuating leg 20 has inside the housing a return 40 intended to bear against the tongue 38 so as to be able to drive the bolt tail 36 in translation when the stand 20 is driven in the direction of clockwise, and retract the bolt head 34 inside the housing. A driving device will now be described which makes it possible, in particular, to simultaneously drive the locking bolts 22, 24, 26 and 28. It comprises, first of all, a control wheel 42 installed below the bolt tail 36. It has a central axis of rotation 44 substantially perpendicular to the plane of the Figure and therefore to the front of the housing not shown in this Figure. The control wheel 42 comprises a disc 46 shown in transparency for greater clarity of the drawing and whose peripheral edge 48 has helical teeth meshing in a vertical worm 50. The worm 50 is mounted on a shaft 52 extended in the extension of the rotor of a drive member 54. The rotor and the shaft 52 are integral with each other in rotation, and the drive member 54 includes an electric motor adapted to be connected to the aforementioned microcontroller and a gearbox. Behind the disc 46, the control wheel 42 comprises a guide ring 56 applied against the disk 46 which it is integral in rotation. In addition, the guide ring 56 has an arcuate internal recess 58 which is seen in the Figure through the transparent disc 46 for the purposes of the description. The shape of the internal arc recess 58 will be explained in greater detail in the rest of the description, and then, in a second step, its function.

The driving device, in addition to the control wheel 42, comprises two opposite kneepads, one upper 60, the other lower 62, and two corresponding control rods, one upper 64 in the extension of the upper knee 60 the lower one 66 in the extension of the lower toggle 62. The upper control rod 64 has an upper connecting end 68 located above the latch bolt 18 while the upper toggle 60 has a first sliding end 70 mounted articulated on the upper connecting end 68 and opposite, a first pivotable end 72 rotatably mounted in a first eccentric position of the control wheel 42 on the disk 46, near the peripheral edge 48. To do this, a first pivot 74 is installed in engagement with the disc 46 and extends projecting towards the front of the Figure, passing through the first end swivel 72 and ending with a toggle pin 76 which extends it, in turn, projecting from the first pivot end 72 will be explained hereinafter based on the toggle pin 76 which forms an eccentric pin. The lower control rod 66 has a lower link end 78 located below the drive wheel 42 at the drive member 54, while the lower toggle 62 has a second sliding end 80 hinged to the lower link end. 78 and opposite, a second pivoting end 82 rotatably mounted in a second eccentric position of the control wheel 42 diametrically opposed to the first eccentric position of the first pivoting end 72 of the upper toggle 60. And furthermore, the second pivoting end 82 is mounted opposite the disc 46 on the guide ring 56 by means of a second pivot 84 whose rear is seen anchored in the guide ring 56 in Figure 2 through the disc 46 shown in transparency. Figure 2 also illustrates the stay which has a tailgate 86, mounted movable in translation substantially parallel to the bolt shank 36 between the drive member 54 and the control wheel 42, and a 88 interlocking head 88 the trailing tail 86 and which projects from the side of the latch 18 and latch bolts 22, 24, 26 and 28.

Moreover, this Figure shows the actuator 34 making it possible to manually drive the interlocking tail 86, and hence the head 88, in translation. Furthermore, in FIG. 2, a pivoting mechanical member 90 is shown between the control wheel 42 and the trailing tail 86, and which is adapted to pivot about a mechanical member axis 91. The pivoting mechanical member 90 has a drive end 92 equipped with a nipple interlocker 94 which extends projecting into a vertical oblong hole formed in the trailing tail 86. And opposite the drive end 92, the pivoting mechanical member 90 has a receiving end 96 fit to receive the toggle pin 76, as will be explained below, to cause the retraction of the stay. Referring now to Figure 3 showing in rear view the details of the control wheel 42 and the latch bolt tail 36. In particular found the guide ring 56 against the disk 46 and the second pivoting end 82 of the lower toggle 62, mounted on the second pivot 84 engaged in the guide ring 56. In addition, and this is also a feature of the invention, Figure 3 shows a link 98 pivotally mounted between the wheel 42 and the latch bolt tail 36, about a pivot axis 100 located between two opposite ends of rod 102, 104, and secured to the housing 12 not shown in this Figure 3. The pivot axis 100 is oriented substantially parallel to the central axis of rotation 44. One of the opposite ends of link 104 has a first link pin 106 located rearward and which extends rearwardly within the internal recess arched 58. In contrast, the other link end 102 has a second link pin 108 which extends forwardly within a notch 110 in the turntable tail 36. Referring now to Figure 5 showing in detail the control wheel 42 in front view, as shown in Figure 2, and the guide ring 56 having its internal arcuate recess 58, through the disc 46. This Arc recess 58 has two opposite ends, one enlarged 112 located near the central axis of rotation 44, the other narrowed 114 spaced apart from the axis. In addition, the avoidance 58 shows, on the side of the widened end 112, a first bearing surface 116 converging from the peripheral edge 48 towards the central axis of rotation 44, and on the side of the narrowed end, a second bearing surface 118 along the peripheral edge 48. In addition, this Figure 5 shows the rod 98 and the first link pin 106 projecting inside the recess 58 and bearing against the second range of circular support 118 near the junction between the two bearing surfaces 116, 118. The first link pin 106 therefore extends behind the disc 46, and found in this Figure the first pivot 74 which extends it in front of the disk 46 and which is connected to the first pivoting end 72 of the upper knee 60 not shown. In addition, there is also the rear of the second pivot 84 anchored in the guide ring 56 and diametrically opposed to the first pivot 74 relative to the central axis of rotation 44. From this position, the control wheel 42, it will be able to be rotated in the direction of clockwise through the motor member and through the worm 54. This requires that such a setpoint is given by the microcontroller and the keyboard 30 of the lock 10. Thus, when the control wheel 42 is rotated in the clockwise direction H, the first bearing surface 116 is brought against the first link pin 106, and the control wheel 42 continues its course, the bearing surface 116 then forms a ramp for the first link pin 106 which is then driven towards the central axis of rotation 44. Thus, in FIG. 6, the elements of FIG. 5, where the control wheel 42 has been trained in rotati and where the first link pin 106 has been brought closer to the central axis of rotation 44. The rod 98 has then been pivoted, clockwise as well, about its pivot axis 100 , here represented in transparency through the disc 46 and the guide ring 56. Reference will now be made to FIG. 4, which then shows in detail the position of the various elements of the lock. First, we find the rod 98 which has pivoted about its pivot axis 100 in the direction of clockwise with the first link pin 106 bearing against the support surface 116. By pivoting with the link 98, the second link pin 108, masked in FIG. 4, and engaged inside the notch 110 of the bolt tail 36, caused the translation movement of the bolt tail 36 according to the arrow R , to the right of the drawing, so as to retract the bolt head 34. In this position, the bolt head 34 is able to release the striker in which it is engaged. In addition to the pivoting of the rod 98, the rotation of the control wheel 42 has also caused the toggle pin 76 to rotate in the clockwise direction and abut against the receiving end 96 of the mechanical member. In doing so, the pivoting mechanical member 90 has itself been rotated anti-clockwise about its axis 91 so that the cam bolt 74 itself has translated the tail of the cam. 80, also according to the arrow R and caused the retraction of its head 88. It will be observed that the movement of the bolt shank 36, via the rod 98 and the movement of the trailing tail 86 by the intermediate of the mechanical member 90 are substantially simultaneous, and they allow to release the lock of the frame of the opening. Specifically, the trailing tail 86 substantially precedes the bolt shank 36, so as to be certain that the trailing tail 86 is fully retracted when the bolt tail 36 is. It will also be observed that the first pivoting end 72 of the upper toggle joint 60 and the second pivoting end 82 of the lower toggle joint 62 are diametrically opposed to one another relative to the central axis of rotation 44 of the control wheel. 42. As a result, the upper and lower knee braces 60 and 62 are in a maximum crossing position and hence the locking bolts 22, 24, 26 and 28 shown in Fig. 1 extend into a position of maximum retraction as well. However, the upper and lower knee pads 60 as shown in FIG. 2, and corresponding more precisely to an angular position of the control wheel 42 as represented in FIG. 5, extend in positions corresponding also to a situation. retracting the locking bolts 22, 24, 26 and 28, allowing the opening of the leaf by actuating the stand 20.

Referring now to Figure 7, to describe means for controlling the different angular positions of the control wheel 42. Thus, the lock comprises an upper contactor 120 and a lower contactor 122 respectively provided with an upper probe 124 and of a lower probe 126.

In addition, the peripheral portion of the guide ring 56 present here two levels, a high level which extends over approximately 155 ° between two opposite recesses, a first 128 and a second 130, and a low level which extends over the rest of the slice. The recesses here shown could be replaced in another embodiment by projecting lugs. As shown in Figure 7, the control wheel 42 is being rotated anti-clockwise to a locking position and the upper probe 124 which has just left the high level to fall to the low level, orders the stop of the motor unit. By inertia, the control wheel 42 continues its course a few degrees. Also, it will be observed that the first link pin 106 is trapped inside the narrowed end 114 of the arcuate recess 58, so as to pivotally lock the rod 98 and thereby the bolt tail turn around 36 which it is secured, in a locking position of the bolt 18.

In Fig. 5, the control wheel 42 joins its intermediate position clockwise and the lower probe 126 will leave the low level to rise to the high level. Also, the detection of this level transition causes the motor unit to stop. The control wheel 42 continues its course a few more degrees, and stops before the bearing surface 116 comes into contact with the first link pin 106. In this position, the locking bolts are in an unlocked position, while the latch bolt 34 is in its extended projecting position. From this last position of the control wheel 42, the latter is rotated in the clockwise direction, the bearing surface 116 then forms a ramp with respect to the first link pin 106 until, as shown in FIG. 6, the upper probe 124 comes out of the low level for the high level and causes the motor unit to stop. The control wheel 42 continues to rotate in a few degrees until it stops completely. Both the latch bolt and the stay are then retracted for an opening of the wing.

Claims (10)

REVENDICATIONS1. A motorized lock comprising, a retractable half-latch bolt (36), latch bolts (22, 24, 26, 28) located on either side of said latch bolt and a drive device for driving said latch bolts locking, said driving device comprising on the one hand a control wheel (42) located in the vicinity of said latch bolt (36) and an electrically controllable drive member (54) for driving said rotating control wheel (42) and on the other hand control rods (60, 64; 62, 66) connecting said control wheel (42) and said latch bolts (22, 24, 26, 28), said control wheel (42) having an eccentric bearing surface (116) for causing said latch bolt (36) to retract when said drive member (54) drives said control wheel (42) to drive said latch bolts (22, 24, 26, 28) to an unlocked position; characterized in that it further comprises a link (98) pivotally mounted between said control wheel (42) and said latch bolt (36); and in that said bearing surface (116) of said control wheel (42) is adapted to cause said link (98) to pivot to cause the retraction of said latch bolt (36). 2. Lock according to claim 1, characterized in that said control wheel (42) comprises a disk (46) having a peripheral driving edge (48) and a guide ring (56) integral in rotation with said disk (46). ) and having an internal recess (58) forming said bearing surface. 3. Lock according to claim 2, characterized in that said inner recess (58) extends in arc between a spaced end (114) of the center of rotation (44) of said wheel (42) and a close end (112) said center of rotation, so as to converge said bearing surface (116) towards said center of rotation. 4. Lock according to claim 2 or 3, characterized in that it comprises contactors (120, 122) located around said control wheel (42), and in that said guide ring (56) has a peripheral edge and pins (130, 128) projecting from said peripheral edge to cooperate with said contactors. 5. Lock according to any one of claims 1 to 4, characterized in that said link (98) has two opposite ends (104, 102) adapted to cooperate respectively with said control wheel (42) and said latch bolt (36), and a pivot axis (100) located between said two opposite ends. 6. A lock according to claim 5, characterized in that one of said ends (104) of said rod adapted to cooperate with said control wheel (42) has a first connecting rod nipple (106) extending in return according to said pivot axis (100). 7. Lock according to any one of claims 1 to 6, characterized in that it further comprises, on the one hand a device entrebâilleur (86) movable between a working position and a rest position, and other a mechanical member (90) located between said control wheel (42) and said stay to bring said stay (86) into said rest position when said control wheel (42) drives said locking bolts (22, 24, 26 , 28) to said unlocked position. 8. Lock according to claim 7, characterized in that said mechanical member (90) is pivotally mounted between said control wheel (42) and said entrebâilleur (86). 9. Lock according to claim 7 or 8, characterized in that said control wheel (42) has an eccentric pin (76) to cooperate with said mechanical member (90). 10. Lock according to any one of claims 1 to 9, characterized in that said control rods comprise firstly, two opposite control rods (64, 66) from each other with respect to said bolt half -turn (36) and movable in translation and secondly two kneepads (60, 62) mounted respectively articulated on said control rods and said control wheel (42).