EP2484851A1

EP2484851A1 - An ambidextrous mortise door lock

Info

Publication number: EP2484851A1
Application number: EP12154148A
Authority: EP
Inventors: Gian Pietro Andreoli; Arthur Karamanov
Original assignee: Iseo Serrature SpA
Current assignee: Iseo Serrature SpA
Priority date: 2011-02-08
Filing date: 2012-02-07
Publication date: 2012-08-08
Anticipated expiration: 2032-02-07
Also published as: IT1403921B1; CN102677965B; ES2527668T3; CN102677965A; EP2484851B1; ITMI20110185A1

Abstract

The ambidextrous mortise door lock comprises, internally of a case (2) of the lock, at least a translatable latch (10), at least a translatable bolt (8), and a first and a second rod (11, 12) translatable in opposite directions transversally to a translation direction of the bolt (8) and the latch (10) between an unblocked position of the door, in which the first and second rods (11, 12) are retracted towards an inside of the case (2), and a blocked position of the door, in which they are protracted towards outside the case (2), a first hole in the case destined to house a first activating cylinder of the latch (10) and the bolt (8) for a right-opening or respectively a left-opening door, a second hole in the case (2) destined to house a second activating cylinder of the latch (10) and the bolt (8) for a left-opening or respectively a right-opening door, a first handle follower (16) to the right or respectively to the left for commanding a first oscillating organ (17) and a first oscillating lever (18) for retracting the latch (10), a second handle follower (20) to the left or respectively to the right for commanding a second oscillating organ (21) and a second oscillating lever (22) for retracting the latch (10), and synchronising means of the oscillation of the first and second oscillating organ (17, 21) and transformation of said synchronised oscillation into a synchronised translation in an opposite direction of said first and second rod (11, 12) between the blocked position and the unblocked position.

Description

The present invention relates to a lock for a door comprising an activating mechanism of a first vertical rod with an upper shoot bolt and a second vertical rod with a lower shoot bolt, reversibly translatable vertically for releasably blocking the door.
The locks are prevalently applicable in the sector of full metal doors.
The locks in general have the drawback of poor flexibility of use due to the fact that they are not reversible, i.e. suitable for changing sides, if not by a complicated and expensive multiplication of the elements constituting the activating mechanism of the rods.
The technical task of the present invention is, therefore, to realise a lock for a door of the above-described type which enables eliminating all the technical drawbacks encountered in the prior art.
In the ambit of this technical task, an aim of the invention is to realise a lock for the above-described type of door which enables changing sides with a small number of constituent elements of the activating mechanism of the rods which exhibit the blocking shoot bolts of the door.
A further aim of the invention is to realise a lock for a door of the above-described type which is extremely simple, secure, reliable, long-lasting and not expensive.
A further and not last aim of the invention is to realise a lock for doors of the above-described type which provides improved flexibility of use in various fields of application with logistics of transport, storage and assembly which are very much simplified.
The technical task, as well as these and further aims besides, according to the present invention, are attained by means of an ambidextrous mortise door lock comprising, internally of a case of the lock, at least a translatable latch, at least a translatable bolt, and a first and a second rod translatable in opposite directions transversally to a translation direction of the bolt and the latch between an unblocked position of the door, in which the first and second rods are retracted towards an inside of the case, and a blocked position of the door, in which they are protracted towards outside the case, characterised in that it comprises a first hole in the case destined to house a first activating cylinder of the latch and the bolt for a right-opening or respectively a left-opening door, a second hole in the case destined to house a second activating cylinder of the latch and the bolt for a left-opening or respectively a right-opening door, a first handle follower to the right or respectively to the left for commanding a first oscillating organ and a first oscillating lever for retracting the latch, a second handle follower to the left or respectively to the right for commanding a second oscillating organ and a second oscillating lever for retracting the latch, and synchronising means of the oscillation of the first and second oscillating organ and transformation of said synchronised oscillation into a translation of said first and second rod between said blocked position and said unblocked position.
Said first and second oscillating organ are advantageously hinged to said case and the hinge axes of said first and second oscillating organ are perpendicular to lateral demarcation walls of said case and lie in a common plane parallel to the front demarcation wall of said case.
The synchronising and transforming means preferably comprise a first and a second drawing pin both present on one of the oscillating organs in a diametrically opposite and equidistant position with respect to the oscillating fulcrum of said oscillating organ, said first drawing pin being slidably engaged in a respective slot present in one of the rods, said second drawing pin being slidably engaged in a respective slot present in the other rod, said synchronising and transforming means further comprising at least a third drawing pin present on the other oscillating organ and engaged slidably in a respective slot present on one of said rods.
Each oscillating organ preferably exhibits a respective pin for receiving movement from a cam of the respective follower.
Said first oscillating organ and said first oscillating lever preferably exhibit a common hinge axis to the case, and likewise said second oscillating organ and said second oscillating lever preferably exhibit a common hinge axis to the case.
Said common hinge axis of said first oscillating organ and said first oscillating lever preferably lies in a plane containing the oscillating axis of said first handle follower, and likewise said common hinge axis of said second oscillating organ and said second oscillating lever preferably lies in a plane containing the oscillating axis of said second handle follower.
At least one from among the oscillating organs advantageously oscillates in contrast to and by action of an elastic linear actuator destined to automatically releasably block said blocked position.
Said linear actuator preferably comprises a piston which is slidable along a guide in contrast to and by action of a spring.
The piston head is preferably hinged to said oscillating organ and the guide has a rounded end resting against an internal corner of the case.
Each follower advantageously oscillates in contrast to and by action of respective one or more resetting elastic elements destined to bring the follower into a neutral position when it rotates in two opposite directions starting from said neutral position.
An oscillating sector is advantageously pivoted to the bolt, which is incorporated in the latch, for blocking the bolt.
The bolt is advantageously pivoted to a further oscillating lever for retraction of the latch, exhibiting a first tab destined to take movement from the cam of the first cylinder, a second tab destined to take movement from the cam of the second cylinder, a first tooth for moving the latch, which first tooth is operative when said first tab is activated by the cam of said first cylinder, and a second tooth for moving the latch, which second tooth is operative when said second tab is activated by the cam of said second cylinder.
Said further oscillating lever and said blocking sector preferably exhibit a common hinge axis to said bolt.
Said blocking section preferably exhibits a first zone for taking the oscillating movement in a direction from the cam of the first cylinder and a second zone for taking the oscillating movement in an opposite direction from the cam of the second cylinder, and oscillates in contrast to and by action of an automatic-return torsion spring to a reference angular position, said torsion spring exhibiting a first spring arm subjected to flexion by a first stop tooth present on the bolt during oscillation in a direction of the blocking sector, and a second spring arm subjected to flexion by a second stop tooth present on the bolt during oscillation in an opposite direction of the blocking sector.
The reversible lock exhibits a very small number of constitutive elements of the activating mechanism of the rods.
Warehouse stocks and logistics from the point of view of the producer of the lock can be appreciably reduced exactly because of the fact that the lock exhibits a minimal number of constituting elements of the activating mechanism of the rods. Warehouse stocks and logistics, from the point of view of the distributor of the locks, can be appreciably reduced exactly because of the fact that the lock is reversible, i.e. adaptable to functioning on the right-hand or the left-hand side. Further characteristics and advantages of the invention will more clearly emerge from the description of a preferred though not exclusive embodiment of the lock for a door according to the invention, illustrated by way of non-limiting example in the accompanying figures of the drawings, in which:

figure 1 is an exploded perspective view of the lock;
figure 2 is a plan view of the lock of figure 1 in the configuration with rods, latch and bolt extracted;
figure 3 is the same view as in figure 2, without rods for greater clarity;
figure 4 is a plan view of the lock of figure 1 in the configuration with rods, latch and bolt retracted, and handle follower activated;
figure 5 is the same view as in figure 4, without rods, for the purpose of greater clarity;
figure 6 is a plan view of the lock of figure 1 in the configuration with rods and bolt retracted, latch extracted and handle follower not activated;
figure 7 is the same view as in figure 6, without rods for the purpose of greater clarity;
figure 8 is a plan view of the lock of figure 1 in the configuration with rods and bolt retracted, latch extracted, and handle follower activated in the opposite direction with respect to what is illustrated in figure 4;
figure 9 is the same view as in figure 8 without rods, for the purpose of greater clarity.

With reference to the cited figures, the ambidextrous lock to be fitted to a door is denoted in its entirety with numerical reference 1.
The lock 1 comprises a case 2 having an essentially parallelepiped shape exhibiting a front demarcation wall 3 and a rear demarcation wall 4 that are opposite one another, and upper demarcation wall 5 and a lower demarcation wall 6 that are opposite one another, and two lateral demarcation walls 7, 7 that are opposite one another.
The case 2 houses, in a known way, a bolt 8 that is horizontally translatable between a position in which it is retracted into the case 2 and a position in which it protracts externally of the case 2 through a window 9 afforded centrally on the front demarcation wall 3, a latch 10 which incorporates the bolt 8 and is also slidable in the same translation direction as the bolt 8 between a position in which is retracted in the case 2 and a position in which it protracts externally of the case 2 through the same window 9, a first rod 11 and a second rod 12 that are vertically translatable between an unblocked position and blocked position of the door.
The first rod 11 is prolonged externally of the box 2 via a window 13 afforded on the upper demarcation wall 5 of the case 2, while the second rod 12 is prolonged externally of the box 2 by means of a window 14 afforded on the lower demarcation wall 6 of the case 2.
In the unblocked position of the door, the rods 11 and 12 are retracted towards the inside of the box 2, while in the blocked position of the door they are protracted towards the outside of the case 2.
The case 2 exhibits a first hole 15 suitable for housing a first cylinder 75 for activating the latch 10 and the bolt 8, in a left-opening door, combined with a left handle follower 16 suitable for commanding a first oscillating organ 17 and a first oscillating lever 18 for retracting the latch 10, and a second hole 19 suitable for housing a second activating cylinder of the latch 10 and the bolt 8 for a right-opening door, combined with a right handle follower 20 suitable for commanding a second oscillating organ 21 and a second oscillating lever 22 for retracting the latch 10.
The first hole 15 and the handle follower 16 are configured such that the rotation axis of the rotor of the cylinder 75 positionable in the first hole 15 and the rotation axis of the handle follower 16 are perpendicular to the lateral demarcation walls 7, 7 of the case 2 and equidistant from the front demarcation wall 3 of the case 2. Likewise, the second hole 19 and the handle follower 20 are configured in such a way that the rotation axis of the rotor of the cylinder positionable in the second hole 19 and the rotation axis of the handle follower 20 are perpendicular to the lateral demarcation walls 7, 7 of the case 2 and equidistant from the front demarcation wall 3 of the case 2.
The second hole 19 and respective the handle follower 20 are arranged specularly to the first hole 15 and respectively to the handle follower 16 with respect to a horizontal halfway plane 25 of the case 2 such that the rotation axis of the rotor of the cylinder positionable in the first hole 15, the rotation axis of the handle follower 16, the rotation axis of the cylinder rotor positionable in the second hole 19 and the rotation axis of the handle follower 20 lie in a common vertical plane 26 parallel to the front demarcation wall 3 of the case 2.
The first rod 11 and the second rod 12 are positioned in a space available in the case 2 between the front demarcation wall 3 of the case 2 and the plane 26.
The latch 10 and the bolt 8 are arranged with the halfway horizontal plane thereof coinciding with the horizontal halfway plane 25 of the case 2 and are therefore interposed between the first hole 15 and the second hole 19 in such a way as to be activatable from one side by the cam 76 of the cylinder 75 present in the first hole 15 when (as illustrated) the lock is destined for a left-opening door, and on the other side of the cam of the cylinder present in the second hole 19 in a case where the lock is destined for a door having a right-opening direction.
The case 2 advantageously contains special synchronising means of the oscillation of the first oscillating organ 17 and the second oscillating organ 21 and of the transformation of said synchronised oscillation into a translation in an opposite direction of the first rod 11 and the second rod 12 between the blocked position and the unblocked position of the door.
The first oscillating organ 17 and respectively the second oscillating organ 21 exhibit a hinge axis 23 and respectively 24 to the case 2 which are perpendicular to the lateral demarcation walls 7, 7 of case 2 and lying in a common vertical plane 27 parallel to the front demarcation wall 3 of the case 2 and interposed between the front demarcation wall 3 and the plane 26.
The synchronising and transformation means comprise a first and a second drawing pin, both present on either one of the oscillating organs 17 and 21, and at least a third drawing pin present on the remaining oscillating organ.
In the exemplary case the first and the second drawing pins, denoted by 28 and 29, are both present on the first oscillating organ 17.
The first drawing pin 28 is slidably engaged in a respective slot 31 present in the first rod 11, while the second drawing pin 29 is present on the first oscillating organ 17 in a diametrically opposite position and equidistant from the first drawing pin 28 with respect to the oscillating fulcrum 23 of the first oscillating organ 17, and is engaged slidably in a respective slot 32 present on the second rod 12.
The third drawing pin 30 is present on the second oscillating organ 21 and is slidably hinged in a respective slot 33 afforded in the second rod 12.
The second drawing pin 29 and the third drawing pin 30 lie in a common vertical plane 34 which in particular is parallel to the front demarcation wall 3 of the case 2 and interposed between the case 2 and the plane 27.
The second oscillating organ 21 comprises a small plate 35 superposed on the rods 11 and 12 and exhibiting, on the opposite side to the side facing towards the rods 11 and 12, in which the third drawing pin 30 and a fourth drawing pin 38 are located (which drawing pin 38 is inactive in the specific embodiment illustrated), a pin 36 for receiving motion from a cam 37 of the second follower 20.
The first oscillating organ 17 has a like structure and comprises a small plate 77 superposed on the rods 11 and 12 and exhibiting, on the opposite side to the side facing towards the rods 11 and 12 in which the first and a second drawing pin 28 and 29 are present, a pin 39 for receiving movement from a cam 40 of the second follower 16.
The first oscillating lever 18 exhibits a hinge axis to the case 2 that is common to the hinge axis 23 of the first oscillating organ 17, and likewise the second oscillating lever 22 exhibits a hinge axis to the case 2 that is common to the hinge axis 24 of the second oscillating organ 21.
More precisely, the hinge axis 23 lies in a horizontal plane 78 containing the oscillating axis of the first handle follower 16, just as the hinge axis 24 lies in a horizontal plane 79 containing the oscillating axis of the second handle follower 20.
At least one from between the first oscillating organ 17 and the second oscillating organ 21, for example, though not necessarily, the second oscillating organ 21, oscillates in contrast to and by action of an elastic linear actuator 41 suitable for automatically releasably blocking the blocked position of the door assumed by the rods 11 and 12.
The linear actuator 41 comprises a piston 42 that is slidable along a guide 43 in contrast to and by action of a spring 44.
The piston head 42 is hinged at 45 to the second oscillating organ 21.
The guide 43 has a rounded end 80 rested against an internal angle of said case 2 and in more detail against the corner 46 between the front demarcation wall 3 and the lower demarcation wall 6.
The corner 46 acts as an oscillating fulcrum for the piston 42 which can assume a variable line of action from one side to the other with respect to the radial direction to the hinge axis 24 in order to invert the rotation momentum on the second oscillating organ 21.
The first follower 16 oscillates in contrast to and by action of one or more elastic reset elements suitable for returning it into a neutral position both after from the neutral position it is rotated in a direction for extraction of the rods 11 and 12 and blocking them in the door-blocked position, and after from the neutral position it is rotated in the opposite direction for unblocking and retracting the rods 11 and 12 and/or for retracting the latch 10.
The elastic elements comprise two helix springs 47 and 48, perpendicular to one another, the first orientated with a horizontal axis parallel to the lower demarcation wall 6 and another orientated with a vertical axis parallel to the rear demarcation wall 4.
The two helix springs 47 and 48 exhibit a first end resting on a common block 49 located at the corner between the upper demarcation wall 5 and the rear demarcation wall 4, and a second end engageable with a respective activating cam 50 and 51 of the first follower 16.
The case 2 exhibits a first end run (not illustrated) in which the second end of the spring 47 is engageable at the neutral position of the first follower 16 and a second end run 53 in which the second end of the second spring 48 is engageable at the neutral position of the first follower 16.
The two springs 47 and 48 are selectively activatable by the respective cam 50 and 51 according to the rotation direction of the first handle follower 16 starting from the neutral position thereof.
Likewise the second follower 20 oscillates in contrast to and by action of one or more elastic reset elements suitable for returning it into a neutral position both after from the neutral position it is rotated in a direction for extraction of the rods 11, and 12 and blocking them in the door-blocked position, and after from the neutral position it is rotated in the opposite direction for unblocking and retracting the rods 11 and 12 and/or for retracting the latch 10.
The elastic elements are entirely alike the ones described herein above with reference to the first handle follower 16 and for this reason they will not be further described.
A sector 54 that is oscillatable to block the bolt 8 is pivoted to the bolt 8, which is incorporated in the latch 10.
A further lever 55, oscillatable for retraction of the latch 10, is further pivoted to the bolt 8.
The lever 55 exhibits a first tab 56 destined to take movement from the cam 76 of the first cylinder 75, a second tab 57 destined to take movement from the cam of the second cylinder, a first tooth 58 for moving the operative latch 10 on a first abutment 61 of the latch 10 when the first tab 56 is activated by the cam of the first cylinder, and a second tooth 59 for moving the operative latch 10 onto a second abutment 62 of the latch 10 when the second tab 57 is activated by the cam of the second cylinder.
The oscillating lever 55 and the blocking sector 54 exhibit a common hinge axis 60 to the bolt 8.
The blocking sector 54 exhibits a first zone 63 for taking the oscillating movement in a direction from the cam 76 of the first cylinder 75 and a second zone 64 for taking the oscillating movement in an opposite direction from the cam of the second cylinder, and oscillates in contrast to and by action of an automatic-return torsion spring 65 to a reference angular position.
The torsion spring 65 exhibits a V-shaped configuration with a first spring arm 66 subjected to flexion by a first stop tooth 67 present on the bolt 8 during the oscillation in a direction of the blocking sector 54, and a second spring arm 68 subjected to flexion by a second stop tooth 69 present on the bolt 8 during the oscillation in the opposite direction of the blocking sector 54.
The torsion spring 65 is housed in a lowering 70 of the bolt 8 exhibiting a first rest wall 71 for the first spring arm 66 and a second rest wall 72 for the second spring arm 68.
The arms 66 and 68 of the spring 65 are engaged, contemporaneously, at the reference corner position of the blocking sector 54 and selectively out of the reference corner position of the blocking sector 54, in respective drawing tabs 82, 83 present on the blocking sector 54.
The sector 54 further exhibits a tooth 73 which, when the sector 54 assumes the reference corner position, is engageable in two different operating positions against a stop 74 exhibited by a lateral demarcation wall 7 of the case 2.
The functioning of the lock is described by way of example with reference to the door with a left opening, as illustrated, wherein a handle is applied to the first handle follower 16 and a cylinder 75 of the lock is applied to the first hole 15, the functioning of the lock being alike for right-opening doors wherein a handle is applied to the second handle follower 20 and a cylinder of the lock is applied to the second hole 19.
The kinematic chain comprising the rods 11, 12, the first and the second oscillating organ 17, 21, exhibits a single degree of freedom.
The user activates the handle upwards and consequently the handle follower 16 rotates starting from the initial neutral position; the cam 40 of the handle follower 16 activates, via the holding pin 39, the oscillating organ 17 the drawing pin 28 of which activates the rod 11.
Via the drawing pin 29, the oscillating organ 17 in turn activates the rod 12 in a synchronised translation in an opposite direction to the rod 11.
When the rod 11 translates it transmits movement to the oscillating organ 21 which performs an equal rotation but in the opposite direction with respect to the oscillating organ 17.
The rods I 1 and 12 protract towards the outside of the case 2 up to reaching the door-blocking position.
Initially the line of action of the linear actuator 41 is orientated in such a way as to generate a rotation momentum which opposes the rotation of the oscillating organ 21 in the direction of extraction of the rods 11 and 12.
The oscillating organ 21, when oscillating, also causes the oscillation of the piston 42, the line of action of which displaces from one side to the other with respect to the radial direction to the hinge axis 24 up to determining the inversion of the rotation momentum exertable on the oscillating organ 21.
In this new situation the rotation momentum exertable on the oscillating organ 21 opposes the rotation thereof in the direction of retraction of the rods 11 and 12 which thus are stably maintained in the position reached, of blocking the door even when the user releases the handle and the handle follower 16 returns automatically into its neutral position by effect of the spring 48.
To unblock and retract the rods 11 and 12, the user activates the handle downwards. The handle follower 16, starting from its neutral position, rotates in the opposite direction to the preceding description and via the cam 40 thereof activates the oscillating organ 17, causing the kinematic chain to perform a contrary movement to the one described above.
Moreover, during this rotation the handle follower 16 activates the oscillating lever 18 which commands the retraction of the latch 10.
When the user releases the handle the handle follower 16 is brought automatically into the neutral position thereof by effect of the spring 47, while the rods I 1 and 12 are maintained stably in the position reached of unblocking the door.
It should be noted that in any position assumed by the oscillating organs 17 and 21 during oscillation thereof the first and second drawing pin 28 and 29 are arranged specularly to the third and fourth drawing pin 30 and 38 with respect to the halfway plane 25 of the case 2.
The bolt 8 is activatable with a turn of a key in the rotor of the cylinder 75 following which the cam 76 exerts, on the bolt 8, a translation force, at the same time exerting, on the oscillating sector 54, a rotation force necessary for displacing it from the angular reference position thereof in order for it to assume a blocking position of the retraction of the bolt 8 starting from a blocking position of the extraction of the bolt 8 or vice versa in order for it to assume a blocking position of the extraction of the bolt 8 starting from a blocking position of the retraction of the bolt 8.
In practice the bolt 8, when extracted from the case 2, is blocked in position by effect of the engaging of the rear wall of the tooth 73 against the front wall of the stop 74 and vice versa, when retracted into the case 2, it is blocked in position by effect of the engagement of the front wall of the tooth 73 against the rear wall of the stop 74.
The oscillation of the sector 54 from the angular reference position thereof when the bolt 8 is translated enables the tooth 73 to pass over the stop 74 and achieve the blocking position of the extraction or retraction of the bolt 8.
In the illustrated case, during oscillation of the sector 54 the spring arm 66 is maintained resting on the relative rest wall 71 while the other spring arm 68 flexes and detaches from the relative rest wall 72 when it is intercepted by the corresponding stop tooth 69. When the rotation force exerted by the cam 76 of the cylinder rotor 75 ceases, the flexed spring arm 68 relaxes and goes to rest against the corresponding rest wall 72 and the sector 54 returns to the angular reference position thereof.
The activating of the latch 10 is achieved by means of a further half-rotation of the key in the cylinder 75 rotor following which the cam 76 operates on the latch 10 in the way that has already been described herein above.
In substance, the handle can be used to command the blocking rods 11 and 12 and the latch 10, while the cylinder 75 can be used to command the bolt 8 and the latch 10.
The bolt 8 further has the function of blocking the rods 11 and 12 when the rods 11 and 12 are in the protracted closing position. The pin defining the axis 60 of the bolt 8 inserts in a recess of the rod 11, preventing retraction thereof (thus also the retraction of the rod 12) when subjected to a force tending to retract it in the direction of the axis 27.
The spring 44, therefore, guarantees that the rods 11 and 12 are maintained reversibly in the closing and opening position reached at end run while the bolt 8 extension automatically blocks the rods 11, 12 irreversibly.
The door lock of the present invention enables changing the side the door opens with a small number of constitutive elements of the activating mechanism of the blocking rods, and is particularly simple, secure, reliable, long-lasting and relatively inexpensive.
The door lock thus conceived is susceptible to numerous modifications and variants, all falling within the scope of the inventive concept; further, all the details can be substituted by technically-equivalent elements.
In practice the materials used, as well as the dimensions, can be any according to needs and the state of the art.

Claims

An ambidextrous mortise door lock comprising, internally of a case (2) of the lock, at least a translatable latch (10), at least a translatable bolt (8), and a first and a second rod (11, 12) translatable in opposite directions transversally to a translation direction of the bolt (8) and the latch (10) between an unblocked position of the door, in which the first and second rods (11, 12) are retracted towards an inside of the case (2), and a blocked position of the door, in which they are protracted towards outside the case (2), characterised in that it comprises a first hole in the case destined to house a first activating cylinder of the latch (10) and the bolt (8) for a right-opening or respectively a left-opening door, a second hole in the case (2) destined to house a second activating cylinder of the latch (10) and the bolt (8) for a left-opening or respectively a right-opening door, a first handle follower (16) to the right or respectively to the left for commanding a first oscillating organ (17) and a first oscillating lever (18) for retracting the latch (10), a second handle follower (20) to the left or respectively to the right for commanding a second oscillating organ (21) and a second oscillating lever (22) for retracting the latch (10), and synchronising means of the oscillation of the first and second oscillating organ (17, 21) and transformation of the synchronised oscillation into a translation of said first and second rod (11, 12) between the blocked position and the unblocked position.
The mortise door lock according to the preceding claim, characterised in that said first and second oscillating organ (17, 21) are hinged to said case (2) and the hinge axes (23, 24) of said first and second oscillating organ (17, 21) are perpendicular to lateral demarcation walls (7, 7) of the case (2) and lie in a common plane (27) parallel to the front demarcation wall (3) of the case (2).
The mortise door lock according to any one of the preceding claims, characterised in that the synchronising and transforming means comprise a first and a second drawing pin (28, 29) both present on one of the oscillating organs (17) in a diametrically opposite and equidistant position with respect to the oscillating fulcrum (23) of said oscillating organ (17), said first drawing pin (28) being slidably engaged in a respective slot (31) present in one of the rods (11), said second drawing pin (29) being slidably engaged in a respective slot (32) present in the other rod (12), said synchronising and transforming means further comprising at least a third drawing pin (30) present on the other oscillating organ (21) and engaged slidably in a respective slot (33) present on one of the rods (11).
The mortise door lock according to any one of the preceding claims, characterised in that each oscillating organ (17, 21) exhibits a respective pin (39, 36) for receiving movement from a cam (40, 37) of the respective follower (16, 20).
The mortise door lock according to any one of the preceding claims, characterised in that said first oscillating organ (17) and said first oscillating lever (18) exhibit a common hinge axis (23) to the case (2).
The mortise door lock according to the preceding claim, characterised in that said common hinge axis of said oscillating organ (17) and said first oscillating lever (18) lies in a plane (78) containing the oscillating axis of said first handle follower (16).
The mortise door lock according to any one of the preceding claims, characterised in that at least one of the oscillating organs (21) oscillates in contrast to and by action of an elastic linear actuator (41) destined to automatically releasably block said blocked position.
The mortise door lock according to the preceding claim, characterised in that said linear actuator (41) comprises a piston (42) which is slidable along a guide (43) in contrast to and by action of a spring (44).
The mortise door lock according to the preceding claim, characterised in that the piston head (42) is hinged to said oscillating organ (21) and the guide (43) has a rounded end (45) resting against an internal corner (46) of the case (2).
The mortise door lock according to any one of the preceding claims, characterised in that each follower (16, 20) oscillates in contrast to and by action of respective one or more resetting elastic elements (47, 48) destined to bring the follower (16, 20) into a neutral position when it rotates in two opposite directions starting from said neutral position.
The mortise door lock according to any of the preceding claims, characterised in that an oscillating sector (54) for blocking the bolt (8) is pivoted to the bolt (8).
The mortise door lock according to any of the preceding claims, characterised in that a further lever (55) is pivoted to the bolt (8) incorporated in the latch (10), which further lever (55) oscillates to retract the latch (10) and exhibits a first tab (56) destined to take movement from the cam of the first cylinder, a second tab (57) destined to take movement from the cam of the second cylinder, a first tooth (58) for moving the latch (10), which first tooth (58) is operative when said first tab (56) is activated by the cam of said first cylinder, and a second tooth (59) for moving the latch (10), which second tooth (59) is operative when said second tab (57) is activated by the cam of said second cylinder.
The mortise door lock according to any one of claims 11 and 12, characterised in that said further oscillating lever (55) and said blocking sector (54) exhibit a common hinge axis (60) to the bolt (8).
The mortise door lock according to any one of claims 11 to 13, characterised in that said blocking sector (54) exhibits a first zone (63) for taking the oscillating movement in a direction from the cam of the first cylinder and a second zone (64) for taking the oscillating movement in an opposite direction from the cam of the second cylinder, and oscillates in contrast to and by action of an automatic-return torsion spring (65) to a reference angular position, said torsion spring (65) exhibiting a first spring arm (66) subjected to flexion by a first stop tooth (67) present on the bolt (8) during oscillation in a direction of the blocking sector (54), and a second spring arm (68) subjected to flexion by a second stop tooth (69) present on the bolt (8) during oscillation in an opposite direction of the blocking sector (54).