SE2051145A1 - Door lock arrangement comprising gear arm with first and second pushing portions - Google Patents

Abstract

A door lock arrangement (1) for mounting in a door leaf (2) is disclosed. The door lock arrangement (1) comprises a faceplate (10) and a mounting plate (12) forming a casing (14) comprising a locking bolt assembly (18) having a projecting position. The casing (14) comprises an auxiliary latch bolt assembly (800) displaceable between a locking position (704, 706) and an unlocking position (702). The casing (14) further comprises a locking member (13) that is rotatable between an inhibiting position (1310) in which the locking member (13) inhibits retraction of the locking bolt assembly (18), and an allowing position (1320). Additionally, the casing (14) comprises a gear arm (16) that is rotatable in the main plane between a first position (1610), in which the inhibiting position (1310) is enterable by the locking member (13), and a second position (1620), in which the locking member (13) is held in the allowing position (1320) by that a first pushing portion (1601) of the gear arm (16) abuts the locking member (13). The gear arm (16) comprises a second pushing portion (1602) adapted to force the locking member (13) from the inhibiting position (1310) towards the second position (1620) by pushing at a distal portion (1301) of the locking member (13).

Description

DOOR LOCK ARRANGEMENT COMPRISING GEAR ARM WITH FIRST AND SECOND PUSHING PORTIONS TECHNICAL FIELD The present invention relates to door lock arrangements for mounting in doors. Someembodiments of the present invention relate to electric door lock arrangements, such as solenoidlock arrangements, solenoid locks, electric locks or the like. ln particular, it is herein disclosed a doorlock arrangement comprising a gear arm comprising a first pushing portion configured to hold alocking member in an allowing position and a second pushing portion configured to push the lockingmember at a distal portion thereof during initial rotation of the gear arm from a first position towards a second position.

BACKGROUND Door lock arrangements have a vast range of applications, such as at hotels, hospitals, officesor the like. For these applications, for example solenoid locks are particularly popular. A commontype of solenoid locks is activated, e.g. unlocked, by means of a Radio Frequency Identification (RFID)tag, a magnetic card or the like. With a solenoid lock of this type, a locking mechanism of thesolenoid lock cannot be operated through actuation of a door handle unless the solenoid lock iselectrically activated (Power-To-Open type locking arrangements). Some solenoid locks allow thedoor handle to operate the locking mechanism without power and do instead require power todeactivate the door handle, i.e. the door is locked when electrically activated (Power-To-Lock typelocking arrangements). These door lock arrangements also often include a knob for manually lockingand unlocking the door, where the knob is only mounted at one side of the door or the door lock affangement. ln a known example, the door can be operated by a door operator, which is arranged to mechanically open and/or close the door. The door operator can be activated by a switch at which aperson can push in order to open the door. The switch can be located next to the door or at adistance to facilitate opening when approaching the door in a wheelchair or the like. ln certainsituations, the door may be locked. Then, in order for the door operator to be able to open the door,the door must be unlocked. This is achieved by that a frame, in which the door is installed, isprovided with an electric strike plate, which upon activation opens and thereby allows a bolt, that iskeeping the door locked, to pass. Electric strike plates are well-known in the art. A purpose of suchelectric strike plates is thus to allow the door to be opened even when the bolt of the door is lockedin a projecting position. However, the electric strike plate adds costs both in terms of price of parts and installation effort.

WO2020130904 discloses a door lock arrangement which cannot be used together with adoor operator. When the known door lock arrangement is used with the door operator, the boltneeds to be retracted in a direction into the door lock arrangement. Retraction of the bolt in such amanner disadvantageously requires huge amounts of energy and power in relation to energy and power available in electric door lock arrangements of the kind disclosed in WO2020130904.

SUMMARYln view of the above, an object may be to alleviate or at least reduce one or more of the abovementioned disadvantages and/or problems.

This object, and other objects, may be achieved by the independent claim appended herewith.

According to an aspect, there is thus provided a door lock arrangement for mounting in adoor leaf adapted to be hinged in a door frame. The door lock arrangement comprises: a faceplate mountable in the door leaf, and a mounting plate adapted to be received by the door leaf.

The faceplate and the mounting plate form a casing.

The casing comprises a locking bolt assembly that is biased towards a projecting position inwhich at least a portion of the locking bolt assembly projects through the faceplate. The locking boltassembly is retractable from the projecting position when the locking bolt assembly is unlocked,whereby closing of the door leaf with respect to the door frame when the door leaf is hinged in thedoor frame is allowed. The locking bolt assembly is prevented from being retractable, from theprojecting position, to allow opening and/or closing of the door leaf with respect to the door framewhen the door leaf is hinged in the door frame when the locking bolt assembly is locked.

Moreover, the casing comprises an auxiliary latch bolt assembly displaceable between alocking position, in which the locking bolt assembly is lockable, and an unlocking position, in whichthe locking bolt assembly is unlocked. The auxiliary latch bolt assembly projects less, or not at all,through the faceplate in the locking position than in the unlocking position due to abutment with thedoor frame when the door leaf is hinged in the door frame. The auxiliary latch bolt assembly is biasedtowards the unlocking position.

The casing further comprises a locking member that is rotatable about a centre of rotation ina main plane of the mounting plate between an inhibiting position in which the locking member inhibits retraction of the locking bolt assembly, whereby the locking bolt assembly is locked, and an allowing position in which the locking member allows retraction of the locking bolt assembly,whereby the locking bolt assembly is unlocked. The locking member is biased towards the inhibitingposition in which a hook portion of the locking member is engageable with the locking bolt assemblyupon retraction of the locking bolt assembly, whereby the locking bolt assembly is locked. Thelocking member is configured to be forced to the allowing position when the auxiliary latch boltassembly biasedly enters the unlocking position.

Furthermore, the casing comprises a gear arm that is rotatable in the main plane between afirst position, in which the inhibiting position is enterable by the locking member, and a secondposition, in which the locking member is held in the allowing position by that a first pushing portionof the gear arm abuts the locking member. ln particular, the locking bolt assembly further is arranged to and designed to retract whenexposed to side forces originating from abutment with the door frame when the door leaf is hingedin the door frame and when the locking bolt assembly is unlocked.

The gear arm specifically comprises a second pushing portion adapted to force the lockingmember from the inhibiting position during initial rotation of the gear arm from the first positiontowards the second position by that the second pushing portion pushes at a distal portion of thelocking member. The distal portion is located distally with respect to the centre of rotation of the locking member.

Thanks to that the gear arm comprises the second pushing portion, which may be said to beconfigured to act on the distal portion of the locking member, a momentum, being large enough toallow the hook portion to be released from the locking bolt assembly during initial rotation of thegear arm, is achieved. Then, upon further rotation of the gear arm, the first pushing portion, whichmay be configured to act on a surface of the locking member that is located closer to the hookportion than the distal portion, preferably located in the vicinity of the hook portion, may displacethe locking member further. ln this manner, the first and second pushing portions may cooperate todisplace with locking member, in contrast to a known gear arm having only one pushing portion.

With only one pushing portion, a trade-off between momentum and displacement of thelocking member is required. However, the present inventors found that it was not possible to achieveenough momentum and enough displacement, e.g. in terms of distance, at the same time. The doorlock arrangement according to the embodiments herein overcomes and circumvents this obstaclethanks to the first and second pushing portions of the gear arm. The second pushing portion maythus be adapted to operate with enough power to release the locking member, e.g. at the dispenseof that the locking member may only be displaced a relatively short distance. The first pushing portion may thus be adapted to displace the locking member further towards the allowing position after the hook portion of the locking member has been released from the locking bolt assembly. Saidrelease from the locking bolt assembly may be achieved by the second pushing portion, preferablysolely by the second pushing portion, e.g. in relation the first pushing portion.

Accordingly, unlocking of the locking bolt assembly is facilitated, especially during side-pressure, e.g. the locking bolt assembly is pressed sideways into a strike plate of a door frame whichcauses the locking bolt assembly to be forced against the hook portion of the locking member.According to at least some examples, unlocking may be performed manually and/or by means of a solenoid in a smooth manner and/or easily, e.g. using relatively small forces. ln some embodiments, at least one of the first and second pushing portions of the gear arm and the distal portion of the locking member is provided with a means for reducing friction, such as abearing, a coating of a slippery material or the like as further exemplified in section 'detaileddescription' below. ln this manner, friction between the gear arm and the locking member may bereduced. ln particular, friction between one or more of the first and second pushing portions and thedistal portion may be reduced. lt may be preferred that at least the second pushing portion of the gear arm is provided with the means for reducing friction. ln some embodiments, at least one of the first and second pushing portions are provided with a respective bearing, such as a respective ball bearing or the like. ln some embodiments, the door lock arrangement comprises an electrical actuation meansarranged to upon activation displace the gear arm from the first position to the second position. electrical actuation means, such as solenoid, electric motor, linear solenoid or the like. ln some embodiments, the locking bolt assembly comprises a double action bolt or any otherkind of locking bolt assembly, which as mentioned above is arranged to and designed to retract whenexposed to side forces originating from abutment with the door frame when the door leaf is hinged in the door frame and when the locking bolt assembly is unlocked.

BRIEF DESCRIPTION OF THE DRAWINGS The various aspects of embodiments disclosed herein, including particular features andadvantages thereof, are explained in the following detailed description and the accompanyingdrawings.

Figure 1 is an overview illustrating a door in which an exemplifying door lock arrangement is installed.

Figure 2 is a side view illustrating the door lock arrangement with connecting lever spindlesand lever handles.

Figure 3a is a cross-sectional view of an exemplifying door lock arrangement.

Figure 3b is a perspective view illustrating geometrical axes and planes with reference to ageneric door lock arrangement having a single-action lock bolt.

Figure 4 includes views illustrating features relating to an exemplifying elongated guidingelement.

Figure 5a through Figure 5c illustrate an exemplifying gear arm according to some examplesherein.

Figure 6 illustrates an exemplifying lock hub according to some examples herein.

Figure 7a through Figure 7c include views illustrating an exemplifying locking member.

Figure 8a through Figure 8f show a set of views illustrating positions of e.g. the gear arm, thebolt, the locking member during opening/closing of the door and/or locking/unlocking of the lockingbolt assembly.

Figure 9 includes views illustrating an exemplifying hub arrangement according to some examples herein.

DETAILED DESCRIPTION ln order to better appreciate the embodiments herein, the following further description ofhow the present solution has been developed is provided.

Should it be possible to adapt aforementioned WO2020130904 to also allow for use togetherwith a door operator, it would be highly advantageous, since cost of the electric strike plate, both interms of material and installation, could be dispensed with. However, energy available in the doorlock arrangement is not enough to be able to retract the bolt. A straightforward solution would be toincrease the amount of energy available in the door lock arrangement in order for e.g. an electricmotor to retract the bolt. ln addition, a lock including the electric motor for retraction of the boltwould also need to include a microcontroller or the like. The microcontroller woulddisadvantageously add to cost of the lock. lt is noted that there are locks which uses microcontrollersand electric motors on the market today. Their main application area is for so called outerprotection, or shell protection. However, these kinds of lock are much more expensive than the doorlock arrangement disclosed in aforementioned WO2020130904. ln contrast thereto, the present inventors have chosen a different path as presented below.

So called double action bolts have been around for many years. A double action bolt isnormally locked in non-energized mode when an auxiliary latch bolt is retracted and in energized mode the double action bolt is unlocked and the door can be pushed and/or pulled to open while the double action bolt is displaced into the door lock arrangement to allow the door to open.

To the inventor's knowledge a double action bolt has not previously been combined with thedoor lock arrangement of the kind disclosed in WO2020130904, e.g. a door lock arrangement withelectrically and mechanically controlled door actuators. While doing this combination, the presentinventors ran into a problem that unlocking of the door was not reliable. The problem is particularlyarticulated when the door is exposed to side pressure or frame forces, which can be caused by titleddoors, under/overpressure in a building, debris between the door and the frame, sealing strips or thelike. When manually opening the door, one usually pushes or pulls the handle of the door to releasethe side pressure and thereby be able to open the door. ln case of an electric door lock, it is moredifficult. A common solution is to install an electric strike plate in the frame, which is capable ofunlocking the door despite the side pressure, which would lead back to the known solutions. |nstead the present inventor presents a solution as described in more detail in the following.

Figure 1 illustrates an exemplifying door lock arrangement 1 when installed, or mounted, in adoor leaf 2, or door for short.

To the left in Figure 1, illustrating a plan view of the door leaf 2, it is shown that the door lockarrangement 1 comprises a first hub 4 for receiving a lock lever (not shown) and a second hub 6 forreceiving a lever handle 8. The door leaf 2 is usually mounted in a door frame 3 via hinges 9.

To the right in Figure 1, illustrating a cross-sectional view of the door leaf 2, it is shown thatthe door leaf 2 may be provided with one handle at each side of the door leaf 2, i.e. a first handle 8aand a second handle 8b.

Notably, throughout the present disclosure any reference to the door or the door frame shallbe understood as applying when the door lock arrangement 1 is mounted in the door and/or when the door is hinged or mounted in the door frame.

Turning to Figure 2, a more detailed cross-sectional view of the door lock arrangement 1 isprovided. As illustrated, the first hub 4 may be adapted to receive a lock actuator spindle 202 thatmay be connected to a knob 204 for manually manoeuvring the door lock arrangement. By use of theknob 204, opening and/or closing of the door may be enabled.

Additionally, the second hub 6 is adapted to receive at least one of a first lever handlespindle 206 and a second lever handle spindle 208. ln turn, each of the first and second lever handlespindles 206, 208 may be connected to a respective lever handle, such as the first and second handles 8a, 8b.

Figure 3a shows, in a cross-sectional view, the exemplifying door lock arrangement 1 according to some embodiments herein. The exemplifying door lock arrangement 1 may include optional features that are merely included for reasons of simplicity.

Generally, with reference to Figure 3a, the door lock arrangement 1 for mounting in the doorleaf 2 comprises a faceplate 10 mountable in the door leaf 2, and a mounting plate 12 adapted to bereceived by the door leaf 2, which typically is adapted to be hinged in the door frame 3. As shown inFigure 3c, the faceplate 10 comprises a first opening 52, see Figure 3c, adapted to receive an auxiliarylatch bolt 800 and a second opening 54, see Figure 3c, adapted to receive a bolt of a locking boltassembly 18. The faceplate 10 and the mounting plate 12 form a casing 14.

Typically, the door frame 3 is provided with a strike plate (not shown), which faces the faceplate 10. As mentioned in the background section of the present disclosure, a so-called electric strikeplate may be required in order to achieved desired functionality in certain scenarios, such as providing a lockable double action door with a door operator.

The casing 14 comprises a locking bolt assembly 18 that is biased towards a projectingposition in which at least a portion of the locking bolt assembly 18 projects through the faceplate 10.The locking bolt assembly 18 is retractable from the projecting position 1801, e.g. by translationthereof in parallel with a geometrical axis 63 that is perpendicular to a main plane 60 of the faceplate10, when the locking bolt assembly 18 is unlocked, whereby closing of the door leaf 2 with respect tothe door frame 3 when the door leaf 2 is hinged in the door frame 3 is allowed.

The locking bolt assembly 18 is prevented from being retractable, from the projectingposition 1801, to allow opening and/or closing of the door leaf 2 with respect to the door frame 3 when the door leaf 2 is hinged in the door frame 3 when the locking bolt assembly 18 is locked.

Moreover, the casing 14 comprises the auxiliary latch bolt assembly 800 displaceablebetween a locking position 704, 706, in which the locking bolt assembly 18 is lockable, and anunlocking position 702, in which the locking bolt assembly 18 is unlocked, e.g. by translation thereofin parallel with the geometrical axis 63. The auxiliary latch bolt assembly 800 projects less, or not atall, through the faceplate 10 in the locking position 704, 706 than in the unlocking position 702 dueto abutment with the door frame 3 when the door leaf 2 is hinged in the door frame 3. The lockingposition and the unlocking position are further described with reference to Figure 8.

The auxiliary latch bolt assembly 800 is biased, such as mechanically biased, e.g. by means ofan elastic material, spring biased, biased by means of a rubber band, an elastic band or the like,towards the unlocking position 702. The auxiliary latch bolt assembly 800 may be spring biased, e.g. using a compression spring, a helical compression spring, a conical spring, an extension spring, a torsion spring, a constant force spring, a belleville spring, a drawbar spring, a volute spring, a garter spring or the like. ln this example, a conical spring is shown by way of example.

Additionally, the casing 14 comprises a locking member 13 that is rotatable about a centre ofrotation in a main p|ane 61 of the mounting plate 12 between an inhibiting position 1310 in whichthe locking member 13 inhibits retraction of the locking bolt assembly 18, whereby the locking boltassembly 18 is locked, and an allowing position 1320 in which the locking member 13 allowsretraction of the locking bolt assembly 18, whereby the locking bolt assembly 18 is unlocked,the locking member 13 is biased towards the inhibiting position 1310 in which a hook portion 1303 ofthe locking member 13 is engageable with the locking bolt assembly 18 upon retraction of thelocking bolt assembly 18, whereby the locking bolt assembly 18 is locked. The locking member 13 isconfigured to be forced to the allowing position 1320 when the auxiliary latch bolt assembly 800biasedly enters the unlocking position 702. The inhibiting position 1310 and the allowing position 1320 are further described with reference to Figure 8.

The casing 14 further comprises a gear arm 16 that is rotatable in the main p|ane 61 of themounting plate between a first position 1610, in which the inhibiting position 1310 is enterable bythe locking member 13, and a second position 1620, in which the locking member 13 is held in theallowing position 1320 by that a first pushing portion 1601 of the gear arm 16 abuts the locking member 13. Again, the first and second positions are further described with reference to Figure 8.

The locking bolt assembly 18 further is arranged to and designed to retract when exposed toside forces originating from abutment with the door frame 3 when the door leaf 2 is hinged in thedoor frame 3 and when the locking bolt assembly 18 is unlocked. ln some examples, the locking boltassembly 18 may thus comprise a double action bolt, a dual action bolt, a roller bolt or the like. As aresult, when the locking bolt assembly 18 is unlocked any existing side-pressure may thus aid in thedisplacement of the locking bolt assembly 18. Consequently, the door lock arrangement 1 does notneed additional energy and/or power than the energy and/or power that is available according to the known solution in WO2020130904.

The gear arm 16 comprises a second pushing portion 1602 adapted to force the lockingmember 13 from the inhibiting position 1310 during initial rotation of the gear arm 16 from the firstposition 1610 towards the second position 1620 by that the second pushing portion 1602 pushes at adistal portion 1301 of the locking member 13. The distal portion 1301 is located distally with respect to the centre of rotation of the locking member 13.

The door lock arrangement 1 herein is versatile and may be applied in a multitude ofscenarios, including split-function where left or right handle may be selectably activated e.g. for purposes of emergency exiting. ln some embodiments, the door lock arrangement 1 comprises an electrical actuation means50 arranged to upon activation displace the gear arm 16 from the first position 1610 to the secondposition 1620. The electrical actuation means may be a solenoid, a linear actuator, an electric motor, a linear solenoid or the like. lt may generally be noted that the rotatable gear arm 16 may be adapted to translationallydisplace the locking bolt assembly 18 by rotation about a rotational axis 20 perpendicular to themounting plate 12. The locking bolt assembly 18 may comprise a latch bolt, a dead bolt, a doubleaction bolt or the like depending on realization of the door lock arrangement 1. lt is well known thatsome door lock arrangements include one or more bolts selected from a group comprising at least alatch bolt, a dead bolt and the like. Accordingly, in a further aspect of the embodiments herein, thedoor lock arrangement 1 comprises a bolt that may be of any kind. Therefore, not limiting theapplicability of the gear arm 16 and the locking member 13 to only the locking bolt assembly 18 thatis arranged to and designed to retract when exposed to side forces originating from abutment withthe door frame 3 when the door leaf 2 is hinged in the door frame 3 and when the locking boltassembly 18 is unlocked. According to this further aspect, the aforementioned features of the locking bolt assembly 18 are optional. ln some embodiments, at least one of the first and second pushing portions 1601, 1602 areprovided with a respective ball bearing. ln Figure 5a through Figure 5c, as an example, both the first and second pushing portions 1601, 1602 are provided with a respective ball bearing.

Moreover, the casing 14 may comprise a lock hub 22 adapted to receive a lock actuatorspindle 202 (shown in Figure 2) for manoeuvring the locking bolt assembly 18. The lock hub 22 maytypically connect to a knob for manually displacing the locking bolt assembly 18, whereby opening ofthe door is possible in case being closed in the first place.

The casing 14 may further comprise a hub arrangement 24 adapted to allow the locking boltassembly 18 to be controlled by actuation of a lever handle spindle, such as the first and second leverhandle spindles 206, 208 as shown in Figure 2. The lever handle spindle may have a square cross- section. Therefore, the hub arrangement 24 may be a square hub arrangement.

The hub arrangement 24 may comprise a rower 25 adapted to receive the lever handlespindle, and a lever hub 29 adapted to at least partially enclose and receive the rower 25. ln order tocooperate well with the hub arrangement 24 the rower may comprise a square-shaped cavity forreceiving the lever handle spindle. Further description of the hub arrangement 24 is provided in connection with Figure 9. ln one example, the casing 14 may further comprise an elongated guiding element 26 that isdisplaceable between a first guiding element position 401 and a second guiding element position 402by translation thereof in a longitudinal direction 406 of the elongated guiding element 26 asillustrated in Figure 4.

The elongated guiding element 26 is biased towards the first guiding element position 401 inwhich the locking bolt assembly 18 protrudes out of the faceplate 10 by that the locking boltassembly 18 is spring biased. ln Figure 4, biasing towards the first guiding element position 401 isachieved by a spring 405.

The elongated guiding element 26 is arranged to retract the locking bolt assembly 18, whenthe elongated guiding element 26 is located in the second guiding element position 402.

Moreover, the elongated guiding element 26 comprises a lock actuation element 28 at a firstend 411 thereof in proximity of the lock hub 22. The lock actuation element 28 is arranged to convertrotation of the lock hub 22 to a translational movement of the elongated guiding element 26 fromthe first guiding element position 401, e.g. in a direction away from the first guiding element position401. Preferably, a one-way conversion of the rotation of the loch hub 22 to translational movementof the elongated guiding element 26 is provided. ln this manner, the lock hub 22 is not necessarilyrotated when the elongated guiding element 26 is displaced from the first guiding element position 401 to the second guiding element position 402.

The elongated guiding element 26 comprises a bolt displacing element 30 at a middle portion413 thereof in proximity of the rotational axis 20 of the gear arm 16, wherein the bolt displacingelement 30 is arranged to convert the translational movement of the elongated guiding element 26to a rotation of the gear arm 16.

The elongated guiding element 26 comprises a lever actuation element 32 at a second end412 thereof in proximity of the hub arrangement 24, wherein the lever actuation element 32 isarranged to convert rotation of the hub arrangement 24 to the translational movement of theelongated guiding element 26.

The elongated guiding element 26 is displaceable along an interior face 34 of the casing 14 in accordance with the translational movement, wherein the interior face 34 is opposite to the 11 faceplate 10 of the door lock arrangement 1. The interior face 34 may be parallel with the faceplate10. lt may be noted that the elongated guiding element 26 may abut directly to the lock hub 22at the first end 411 of the elongated guiding element 26, abut directly to the hub arrangement 24 atthe second end 412 of the elongated guiding element 26 and abut directly to the gear arm 16 at themiddle portion 413 of the elongated guiding element 26 between the first and second ends 411, 412.Typically, the gear arm 16 is adapted to displace the locking bolt assembly 18 when rotated by translation of the elongated guiding element 26.

The elongated guiding element 26 may further be operable by means of actuation of thelever handle spindle 206, 208 and the lock actuator spindle 202 to be displaced between the first andsecond positions 401, 402. Hence, in this manner, the elongated guiding element may be displacedbetween the first and second positions 401, 402 according to operation be e.g. a user, a human, a person or any one attempting to open and/or close the door.

The lock actuation element 28 may comprise a fork 420 adapted to be received by at leastone groove 850 of the lock hub 22 to convert the rotation of the lock hub 22 to the translationalmovement of the elongated guiding element 26. ln this manner, the rotation of the lock hub 22 isefficiently converted to the translational movement of the elongated guiding element 26 whilerequiring a very limited amount of space in the casing 14. For example, the rotation of the lock hub22 does not cause arms or levers to rotate, which normally would require relatively large amounts ofspace within the casing 14. The fork 420 together with said at least one groove 850 of the lock hub22 form an exemplifying mechanism to achieve the abovementioned one-way conversion.

The bolt displacing element 30 may comprise a projecting part 31 adapted to convert therotation of the hub arrangement 24 to the translational movement of the elongated guiding element26 to cause the locking bolt assembly 18 to be retracted.

The lever actuation element 32 may comprise a first set of gear teeth 430 adapted to bereceived by a second set of gear teeth 910 of the lever hub 29, as shown in more detail in Figure 9, toconvert the rotation of the lever hub 29 to the translational movement of the elongated guidingelement 26. ln this manner, clockwise or counter-clockwise rotation of the lever hub 29 may betransferred to the translation of the elongated guiding element 26, while only requiring the lever hub29 and the elongated guiding element 26 to connect, or abut, with each other at one small section,e.g. 90 degrees or less, of an imaginary circle that is concentric with a rotational axis of the lever hub29.

As described above, this means that the elongated guiding element 26 is arranged to be 12 displaceable without rotation between the first guiding element position 401 and the second guidingelement position 402. The locking bolt assembly 18 is retracted in the second guiding elementposition 402.

Again, the elongated guiding element 26 is arranged to be biased towards the first guidingelement position 401 in which the lock hub 22 is in a first rotational hub position. When the lock hub22 is rotated, e.g. by means of a knob, the lock hub 22 leaves the first rotational hub position,counter-clockwise or clockwise, while the elongated guiding element 26 at the same time is forced toleave its first biased position 401.

The lock hub 22 is connected to the guiding element 26 to provide a one-way conversion ofspindle rotation to translational movement of the elongated guiding element, e.g. thanks to the aforementioned fork as an exemplifying realization.

Figure 5a through Figure 5c illustrate the gear arm 16 according to an exemplifyingrealization, in which the first and second pushing portions 1601, 1602 are provided with a respectiveball bearing. The first and second pushing portions 1601, 1602 may be located at a distal portion ofthe gear arm 16, e.g. with respect to the rotational axis 20.

Furthermore, the gear arm 16 comprises an orifice 1603 or the like. The orifice 1603 isadapted to accommodate a protrusion 1805 of the locking bolt assembly 18. A purpose of the orifice1603 and the protrusion 1805 is to assist, and/or support, the gear arm 16 during at least someportion of displacement between the first and second positions 1610, 1620.

On the one hand, thanks to a clearance between the protrusion 1805 and the orifice 1603,the gear arm 16 may, during the initial rotation from the first position 1610, rotate without beingimpeded by the locking bolt assembly 16, i.e. the biasing of the locking bolt assembly 16.

On the other hand, the protrusion 1805 and the orifice 1603 may ensure that the gear arm16 is located in the first position 1610 when the locking bolt assembly 18 is located in the projectingposition. The locking member 13 may also assist, and/or support, displacement of the gear arm 16 from the second position 1620 to the first position 1610.

Figure 6 illustrates the lock hub 22 according to an exemplifying realization. ln this example,the groove 850 extends along somewhat more than half of the circumference of the lock hub 22.Notably, the lock hub 22 comprises two abutting surfaces 852, 854, which are adapted to cause theelongated guiding element 26 to be displaced from its first guiding element position 401 when desired.

Figure 7a through Figure 7c shows an exemplifying locking member 13 that is adapted to 13 cooperate with the auxiliary latch bolt 800 to achieve locking and unlocking of an exemplifying bolt,such as the locking bolt assembly 18.

The locking member 13 comprises a distal portion 1301. As shown, in Figure 7b, the distalportion 1301 is located distally with respect to the centre of rotation of the locking member 13. Thecentre of rotation is indicated by an axis 1305. A surface 1306 of the distal portion 1301 may bearranged to, such as shaped, formed or otherwise adapted to, such that a surface 1306 thereof mayabut, or at least be located in close vicinity of, the second pushing portion 1602 of the gear arm 16,when the gear arm 16 is located in its first position 1610 and the locking member 13 is located in itsinhibiting position 1310.

The locking member 13 may further comprise a proximal portion 1304, which may be locatedin the vicinity of the hook portion 1303. The proximal portion 1304 is proximal with respect to thedistal portion 1301 and relatively the axis 1305. The proximal portion 1304 may have a surface 1306at which the first pushing portion 1601 of the gear arm 16 may be arranged to act after the initialrotation of the gear arm 16. Notably, it may be that during some part of the rotation of the gear arm16 from the first position 1610 to the second position 1620 both the first and second pushingportions 1601, 1602 acts on the locking member 13.

The aforementioned hook portion 1303 of the locking member 13 may be adapted to engagewith the locking bolt assembly 18, whereby the bolt is prevented from being further retracted intothe casing 14, when the locking member 13 is located in the inhibition position 1310.

Moreover, the locking member 13 has a protruding locking support 1302 adapted to engagewith the auxiliary latch bolt assembly 800 when the auxiliary latch bolt assembly 800 is in theunlocking position 702. Furthermore, the locking member 13 is biased to rotate such that the hookportion 1303 engages with the locking bolt assembly 18 unless the locking member 13 is inhibited by e.g. the gear arm 16. ln the foregoing, specific examples of the gear arm 16 and the locking member 13 have beenprovided. lt is appreciated that, generally, at least one of the first and second pushing portions 1601,1602 of the gear arm 16 and the distal portion 1301 of the locking member 13 is provided with ameans for reducing friction. The means for reducing friction between at least some portion of thegear arm 16 and at least some portion of the locking member 13 may include a bearing, a coating ofa slippery material, a roll bearing, a needle bearing, a ball bearing. Other bearing types include deep-groove ball bearings, angular contact ball bearings, self-aligning ball bearings, thrust ball bearings,spherical roller bearings, cylindrical roller bearings, tapered roller bearings, needle roller bearingsand more. ln one example, the second portion 1602 of the gear arm 16 is provided with the means for 14 reducing friction. ln this example, the first portion 1601 and the distal portion 1301 of the lockingmember 13 may thus not be provided with the means for reducing friction. That is only the secondportion 1602 is provided with the means for reducing friction. ln another example, it may be that(only) the distal portion 1301 of the locking member 13 is provided with the means for reducing friction.

Figure 8a through Figure 8f show operation of the door lock arrangement 1, i.e. in asequence of Figures, exemplifying positions and locations of e.g. the gear arm 16, the auxiliary latchbolt assembly 800, the locking member 13 and the locking bolt assembly 18 are illustrated.

Figure 8a shows the door lock arrangement 1 in a resting state, e.g. when the door is open.The auxiliary latch bolt assembly 800 is in the unlocking position 792 towards which it is biased. Thelocking member 13 is in the allowing position 1320 against its biasing toward the inhibiting position1320.

Figure 8b shows the door lock arrangement 1 in a locked state, e.g. when the door is closedand the locking bolt assembly 18 is inhibited from retraction by the locking member 13.

Figure 8c shows the door lock arrangement 1 when the solenoid is activated to unlock thelocking bolt assembly 18. Figure 8c may show a state just after the initial rotation, during which it ispreferred that the second pushing portion alone urges the locking member 13 towards its allowingposition.

Figure 8d shows that the locking bolt assembly 18 is unlocked, i.e. the hook portion of thelocking member has been released from the locking bolt assembly 18 and the locking member hasbeen displaced by initially the second pushing portion and then also the first pushing portion out ofthe inhibiting position and into the allowing position. As a result, any side forces, e.g. due to pullingby a person, frame pressure or a door operator, will cause the door to open.

Figure 8e shows a state in which opening of the door has begun. Thanks to the protrusion ofthe locking bolt assembly 18 and the orifice of the gear arm 16, movement of the locking boltassembly 18 pushes the gear arm 16 further in the second position as the locking bolt assembly 18 isretracted in a direction into the door lock arrangement 1 along the geometrical axis 63.

Figure 8f shows when the door is located such that the locking bolt assembly 18 is pushedinto the door lock arrangement by the strike plate, i.e. by flat surfaces surrounding edges of anopening of the strike plate. The opening of the strike plate is able to receive the locking bolt assembly 18 in order to secure the door when locked.

Figure 9 illustrates in more detail an exemplifying hub arrangement 24. ln this example, the hub arrangement 24 comprises a cam pin 510, which may be rotated between at least a first rotational position and a second rotational position to selectively cause either of the first or secondlever handle 8a, 8b to be operational for opening of the door 2.

Hence, according to another aspect, there may be provided a door lock arrangement 1 forinstallation in a door leaf 2. Again, the door lock arrangement 1 comprises a mounting plate 12adapted to be received by the door leaf 2.

The mounting plate 12 supports, or upholds, a hub arrangement 24.

The hub arrangement 24 is adapted to selectably control whether a bolt is retracted or notupon on actuation of at least one of a first lever handle 8a and a second lever handle 8b, mountableat a first side 5 of the door leaf 2 and a second side 7 of the door leaf 2, respectively.

The hub arrangement 24 further comprises a first rower 25a, wherein the second engagingarm 504 is biased to disengage the second distal end 506 from the second rower 25b adapted toreceive a first lever handle spindle, connectable to the first lever handle 8a, from the first side of thedoor leaf 2, and a second rower 25b adapted to receive a second lever handle spindle, connectableto the second lever handle 8b, from the second side of the door leaf 2.

Moreover, the hub arrangement 24 comprises a lever hub 29 adapted to at least partiallyenclose and receive the first and second rowers 25a, 25b.

Firstly, the hub arrangement 24 further comprises a first engaging arm 501 having a firstproximal end 502 and a first distal end 503, wherein the first engaging arm 501 is biased to keep thefirst distal end 503 spaced apart from the first rower 25a, wherein the first proximal end 502 isrotatably mounted at a first face of the lever hub 29, wherein the first face faces the first side of thedoor leaf 2, wherein the first distal end 503 and the first rower 25a are adapted to cause, whenabutting against each other, the lever hub 29 to rotate when the first rower 25a is rotated whileallowing the lever hub 29 to rotate while not causing the first rower 25a to rotate.

Secondly, the hub arrangement 24 further comprises a second engaging arm 504 having asecond proximal end 505 and a second distal end 506, wherein the second engaging arm 504 isbiased to keep the second distal end 506 spaced apart from the second rower 25b, wherein thesecond proximal end 505 is rotatably mounted at a second face of the lever hub 29, wherein thesecond face faces the second side of the door leaf 2, wherein the second distal end 506 and thesecond rower 25b are adapted to cause, when abutting against each other, the lever hub 29 to rotatewhen the second rower 25b is rotated while allowing the lever hub 29 to rotate while not causing thesecond rower 25b to rotate.

The mounting plate 12 may hold an electrically activatable moving member 40 having adisplaceable element 42 that is displaceable between an engaging position and a non-engagingposition based on electrical activation of the electrically activatable moving member 40. The electrically activatable moving member may be a solenoid, an electric motor or the like. The 16 displaceable element 42 ensures that both the first and second engaging arms 501, 504 are engagedwith the first and second rowers 25a, 25b, respectively, when the displaceable element 42 is in theengaging position and wherein the displaceable element 42 allows both the first and secondengaging arms 501, 504 to disengage with the first and second rowers 25a, 25b, respectively, when the displaceable element 42 is in the non-engaging position.

Returning to the cam pin 510, the lever hub 29 comprises a through hole in which the campin 510 is rotatably installed.

The cam pin 510 is rotatable about a longitudinal axis thereof between at least a firstrotational position and a second rotational position. A difference in rotation between the first andsecond rotational positions may be 90 degrees, 180 degrees or another suitable value. An advantagewith 90 degrees compared to 180 degrees may be that the cam pin 510 need be rotated less to change which lever handle that active, i.e. effective for causing the retraction of the bolt.

As used herein, the term "bias", "biased", "biasing" or the like may refer to mechanicalbiasing by means of a spring, a plate spring or the like. ln some examples, biasing may be achieved bya magnet, such as an electro-magnet, permanent magnet or the like.

As used herein, the term ”along an axis" may refer to parallelly with the axis and/orcoinciding with the axis.

Each embodiment, example or feature disclosed herein may, when physically possible, becombined with one or more other embodiments, examples, or features disclosed herein.

Even though embodiments of the various aspects have been described above, many differentalterations, modifications and the like thereof will become apparent for those skilled in the art. The described embodiments are therefore not intended to limit the scope of the present disclosure.

Claims (5)

1. A door lock arrangement (1) for mounting in a door leaf (2) adapted to be hinged in a doorframe (3), wherein the door lock arrangement (1) comprises: a faceplate (10) mountable in the door leaf (2), and a mounting plate (12) adapted to be received by the door leaf (2), wherein the faceplate (10)and the mounting plate (12) form a casing (14) comprising: a locking bolt assembly (18) that is biased towards a projecting position (1801) in which at leasta portion of the locking bolt assembly (18) projects through the faceplate (10), wherein the lockingbolt assembly (18) is retractable from the projecting position (1801) when the locking bolt assembly(18) is unlocked, whereby closing of the door leaf (2) with respect to the door frame (3) when thedoor leaf (2) is hinged in the door frame (3) is allowed, wherein the locking bolt assembly (18) isprevented from being retractable, from the projecting position (1801), to allow opening and/orclosing of the door leaf (2) with respect to the door frame (3) when the door leaf (2) is hinged in thedoor frame (3) when the locking bolt assembly (18) is locked, an auxiliary latch bolt assembly (800) displaceable between a locking position (704, 706), inwhich the locking bolt assembly (18) is lockable, and an unlocking position (702), in which the lockingbolt assembly (18) is unlocked, wherein the auxiliary latch bolt assembly (800) projects less, or not atall, through the faceplate (10) in the locking position (704, 706) than in the unlocking position (702)due to abutment with the door frame (3) when the door leaf (2) is hinged in the door frame (3),wherein the auxiliary latch bolt assembly (800) is biased towards the unlocking position (702), a locking member (13) that is rotatable about a centre of rotation in a main plane (61) of themounting plate (12) between an inhibiting position (1310) in which the locking member (13) inhibitsretraction of the locking bolt assembly (18), whereby the locking bolt assembly (18) is locked, and anallowing position (1320) in which the locking member (13) allows retraction of the locking boltassembly (18), whereby the locking bolt assembly (18) is unlocked, wherein the locking member (13)is biased towards the inhibiting position (1310) in which a hook portion (1303) of the locking member(13) is engageable with the locking bolt assembly (18) upon retraction of the locking bolt assembly(18), whereby the locking bolt assembly (18) is locked, wherein the locking member (13) is configuredto be forced to the allowing position (1320) when the auxiliary latch bolt assembly (800) biasedlyenters the unlocking position (702), and a gear arm (16) that is rotatable in the main plane (61) between a first position (1610), in whichthe inhibiting position (1310) is enterable by the locking member (13), and a second position (1620),in which the locking member (13) is held in the allowing position (1320) by that a first pushingportion (1601) of the gear arm (16) abuts the locking member (13), characterized in that the locking bolt assembly (18) further is arranged to and designed to retract when 18 exposed to side forces originating from abutment with the door frame (3) when the door leaf (2) ishinged in the door frame (3) and when the locking bolt assembly (18) is unlocked, andin that the gear arm (16) comprises a second pushing portion (1602) adapted to force the locking member (13) from the inhibiting position (1310) during initial rotation of the gear arm (16)from the first position (1610) towards the second position (1620) by that the second pushing portion(1602) pushes at a distal portion (1301) of the locking member (13), wherein the distal portion (1301) is located distally with respect to the centre of rotation of the locking member (13).

2. The door lock arrangement (1) according to the preceding claim, wherein at least one of the firstand second pushing portions (1601, 1602) and the distal portion (1301) is provided with a means for reducing friction.

3. The door lock arrangement (1) according to any one of the preceding claims, wherein at least one of the first and second pushing portions (1601, 1602) are provided with a respective ball bearing.

4. The door lock arrangement (1) according to any one of the preceding claims, further comprisingan electrical actuation means (50) arranged to upon activation displace the gear arm (16) from the first position (1610) to the second position (1620).

5. The door lock arrangement (1) according to any one of the preceding claims, wherein the locking bolt assembly (18) comprises a double action bolt (18).