EP2616612B1 - A lock assembly - Google Patents
A lock assembly Download PDFInfo
- Publication number
- EP2616612B1 EP2616612B1 EP10857199.3A EP10857199A EP2616612B1 EP 2616612 B1 EP2616612 B1 EP 2616612B1 EP 10857199 A EP10857199 A EP 10857199A EP 2616612 B1 EP2616612 B1 EP 2616612B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wire spring
- lock assembly
- locking arm
- lock
- actuator slide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000007246 mechanism Effects 0.000 claims description 40
- 230000007704 transition Effects 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 description 29
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 210000003414 extremity Anatomy 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 210000000629 knee joint Anatomy 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
- E05C3/00—Fastening devices with bolts moving pivotally or rotatively
- E05C3/02—Fastening devices with bolts moving pivotally or rotatively without latching action
- E05C3/06—Fastening devices with bolts moving pivotally or rotatively without latching action with operating handle or equivalent member moving otherwise than rigidly with the bolt
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage; Sky-lights
- E04D13/03—Sky-lights; Domes; Ventilating sky-lights
- E04D13/0325—Sky-lights; Domes; Ventilating sky-lights provided with ventilating means
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
- E05B15/0053—Other details of locks; Parts for engagement by bolts of fastening devices means providing a stable, i.e. indexed, position of lock parts
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
- E05B15/04—Spring arrangements in locks
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
- E05B15/04—Spring arrangements in locks
- E05B2015/0451—Folded springs
Definitions
- the present invention relates to a lock assembly for a ventilating window having a sash arranged to be openable with respect to a main frame by pivotal movement about an axis parallel to a pair of opposed sash members.
- WO 02/084043 discloses a lock assembly for a ventilating window having a sash arranged to be openable with respect to a main frame by pivotal movement about an axis parallel to a pair of opposed sash members.
- This lock assembly collaborates with a striking plate fixed to a main frame member opposite one of the pair of sash members and a casing fixed to one sash member opposite the striking plate.
- a lock mechanism is arranged in the casing and the lock mechanism is operable by an operator member accessible from the inside of the window via an actuator slide displaceable in a slot in the casing between a first end position defining the unlocked position, a second end position defining the locked position and a third, intermediate position where the window is slightly open to achieve ventilation.
- the lock assembly is provided with a number of wire springs that are operably connected to the lock mechanism to bias the lock to the locked position, the unlocked position and the stable intermediate position.
- the springs are wire springs that are supported at two points and the wire springs form a smooth curve between the two points.
- This known lock assembly has proven to be reliable, user-friendly and a generally very satisfying product, but a little bulky and there is a desire to construct a more compact lock with smaller dimensions.
- a more compact lock among other benefits enables a window design with better insulation.
- a lock assembly for a ventilating window having a sash arranged to be openable with respect to a main frame by pivotal movement about a pivot axis parallel to a pair of opposed sash members
- the lock assembly comprises a casing, a locking arm, a lock mechanism arranged in the casing for enabling the locking arm to be displaceable between a first position defining an unlocked position and a second position defining a locked position, a wire spring operably connected to the lock mechanism, the wire spring being supported at a first point and at a second point, whereby the distance between the first point and the second point changes when the lock mechanism moves to another position, whereby the wire spring comprises three portions between the two points, a middle portion and two outer portions.
- the lock assembly has a middle portion that is directed roughly parallel with a line connecting the two points and/or the outer portions comprise a part that is directed roughly at a right angle with a line connecting the two points.
- the wire spring By providing the wire spring with outer portions that are roughly extending in a direction at a right angle between the imaginary line connecting the two points and/or by arranging a middle portion that is directed roughly parallel with a line connecting the two points, it is possible to construct a small and compact spring that can handle large forces. The reason is that a larger portion of the material of the wire spring is bend when the wire spring is loaded. With the present construction most of the middle section of the wire spring is involved in the bending. Having smaller and stronger springs allows in turn for a more compact construction of the lock assembly.
- wire spring according to the present disclosure a substantial portion of the spring wire material of the wire spring is bend when the spring is loaded and unloaded. Therefore, much more energy can be stored in a wire spring according to the present disclosure when compared with a prior art wire spring of similar dimensions and the same spring wire material.
- the middle portion is directed roughly parallel with the line.
- the transition between the middle section and an outer section may include sharply bent wire.
- the transition between the middle section and an outer section may include a bend in the wire sharper than 70 degrees.
- the substantially straight middle section forms a substantial portion of the extent of the wire spring between the two points.
- the middle section is only slightly curved at any position of the locking arm.
- the middle section is curved when no load is applied to the wire spring, but the middle section is substantially straight and pre-tensioned when the wire spring is mounted in the lock assembly.
- the lock mechanism may include a knee joint connected to a actuator slide that is partially received in a straight guide slot.
- the lock mechanism may comprise an actuator slide operably connected to a locking arm via the knee joint and the actuator slide (13) having three stable positions, namely a locked position with the locking arm in the locked position, an unlocked position with the locking arm in the unlocked position and an intermediate position between the unlocked position and the locked position with the lock arm in the locked position when the actuator slide is in the intermediate position.
- a lock assembly for a ventilating window having a sash arranged to be openable with respect to a main frame by pivotal movement about a pivot axis parallel to a pair of opposed sash members
- the lock assembly comprises a casing, a locking arm, a lock mechanism arranged in the casing for enabling the locking arm to be displaceable between a first position defining an unlocked position and a second position defining a locked position, a wire spring operably connected to the lock mechanism, the wire spring being supported at a first point and at a second point, whereby the distance between the first point and the second point changes when the lock mechanism moves to another position, whereby the wire spring is at one point supported by a groove in a stationary part of the lock assembly.
- the orientation of the wire spring is sufficiently secured in a way that takes little place, and allows easy manufacture and production.
- the wire spring is being provided with a helical section that was slid over a pin.
- these helical sections get entangled with one another when a number of wire springs are stored in a container.
- time and energy is lost for getting wire springs free from the other wire springs in the container when the wires are needed for mounting to the lock mechanism.
- the wire spring is at one point supported by a fastening pin head and the groove is provided in the fastening pin head.
- the groove is a circumferential groove in the fastening pin head.
- the wire spring may be curved in the area where the wire spring is supported by the fastening pin head.
- a lock assembly for a ventilating window having a sash arranged to be openable with respect to a main frame by pivotal movement about a pivot axis parallel to a pair of opposed sash members
- the lock assembly comprises a casing, a locking arm, a lock mechanism arranged in the casing for enabling the locking arm to be displaceable between a first position defining an unlocked position and a second position defining a locked position, a wire spring operably connected to the lock mechanism, the wire spring being supported at a first point and at a second point, whereby the distance between the first point and the second point changes when the lock mechanism moves to another position, whereby the first portion of the wire spring that extends from the first point towards the other end of the wire spring is substantially directed away from the second support point.
- the orientation of the wire spring is stabilized and its tendency to twist of the plane in which it is supposed to be lying is substantially reduced by directing the first portion of the wire spring away from the second support point.
- the wire spring twists it can press against the sash thereby causing friction and heavy and irregular operation of the lock.
- the first portion of the wire spring that extends from the second support point towards the other end of the wire spring is substantially directed away from the first support point.
- the first portion is substantially straight and ends with a first roughly 90° bend.
- the wire spring may continue after the first roughly 90° bend with a second substantially straight portion that ends at a second roughly 90° bend.
- the wire spring may continue after the second roughly 90° bend in a substantially straight fashion and in the same plane as the first portion and the second portion with a middle portion.
- Figures 1 and 2 show a ventilation window having a sash 2 arranged to be openable with respect to a window frame 1 by pivotal movement about a pivot axis X parallel to a pair of opposed sash members.
- the sash 2 is in an open position.
- the sash is in a close position with an open ventilation path.
- the ventilation window is provided with a top cover 4 that covers the ventilation opening in the sash 2 to protect the ventilation path from rain and the like, but an opening 6 between the top cover 4 and the window pane 5 allows the passage of air.
- the ventilation path extends from an inlet 6 through the sash 2.
- the first part of the ventilation path is defined by the top cover 4 and the upper outward areas of the sash 2 and the window frame 1.
- a filter covers the inlet 6 of the ventilation channel.
- the inwardly facing end of the ventilation path ends at a ventilation opening in the sash 2.
- a pivotally mounted ventilation flap 7 is shown in an intermediate ventilating position.
- the ventilating flap 7 registers with the ventilation opening in a closed position (not shown) of the ventilation flap 7 for closing the ventilation opening and thereby preventing passage of air through the ventilation path.
- a handle bar 8 for an operator is connected to the ventilation flap 7.
- a lock 10 is mounted in the ventilation opening in the sash 2.
- the lock is 10 described in greater detailed further below.
- the lock includes one or more movable locking arms 11 that can engage a striking plate 12 that is mounted on the window frame 1.
- a link 9 to lock 10 operably connects the ventilation flap 7 to the lock 10.
- the ventilation flap 7 has a closed position, an intermediate ventilation position and a fully open position. In the intermediate ventilation position (shown) the ventilation flap 7 does not register with the ventilation opening so it allows passage of air through the ventilation path, but the lock 10 is in a locking position and the movable locking arms 11 engage the striking plate 12 and prevent opening of the window.
- the lock 10 is also in the locked position when the ventilation flap 7 is in the closed position.
- the movable locking arms 11 do not engage the striking plate 12 and the window can be opened.
- Figures 3 and 4 show the lock assembly 10 in the unlocked and locked position of the locking arms 11, respectively.
- the locking arms 11 can engage a well-known type of striking plate with a specific shape and dimensions.
- the lock assembly comprises a casing 15 of for example cast metal or plate metal.
- the casing 15 houses the lock mechanism that will be described in detail further below.
- the casing is provided with a centrally located straight guide slot 14. On each side of the guide slot 14 the casing is provided with a curve slot 18.
- a common actuator slide 13 is partially received in the straight guide slot 14 and allows the common actuator slide 13 to move back and forth in the straight guide slot 14. In figure 3 the common actuator slide 13 is in the unlocked position, and in figure 4 in the common actuator slide 13 is in the intermediate ventilating position.
- a portion of the locking arms 11 protrudes from the casing 15 through the respective curved guide slot 18.
- a lining 17 of plastic or other soft material around a portion of the locking arms 11 fits into the curved guide slot 18 and serves noise reduction. Thus, the lining 17 moves in unison with the respective locking arm 11.
- FIG. 5 shows the lock assembly from below and gives a view of the lock mechanism.
- the common actuator slide 13 is provided with a plate on the inside of the casing 15. At opposite ends of the plate the common actuator slide 13 pivotally connects to one end of link members 23. The other end of the link member 23 is pivotally connected to a locking arm 11.
- a locking arm 11 forms together with a link member 23 and the common actuator slide 13 a knee joint.
- There is a locking arm 11 on each side of the straight guide slot 14, and each locking arm is connected to the common actuator slide 13 via a link member 23 to form a knee joint.
- Two fastening pinheads 27 project downwardly from the casing 15. These fastening pinheads 27 serve to facilitate precise mounting of the lock assembly onto the sash 2. Hereto the sash is provided with bores in which the locking pinheads 27 are partially received.
- the lock mechanism includes four wire springs: two wire springs 20 and two wire springs 25.
- the wire springs 20,25 can be made of steel spring wire.
- a first wire spring 20 is supported at one end by a fastening pinhead 27 and at its other end at the pivot axis between the locking arm 11 and the link member 23.
- a second wire spring 20 is identically supported by the fastening pinhead 27 and the pivot axis between locking arm 11 and the link member 23 on the other side of the common actuator slide 13.
- the first wire spring 25 is supported at one end by a central hole in one of the link members 23 and the first wire spring 25 is supported at its other end in a hole at the pivot axis between the link member 23 and the common actuator slide 13.
- the second wire spring 25 is identically supported by a central hole in the link member 23 on the other side of the common slide and in a hole at the pivot axis between this link member 23 and the common slide 13.
- the wire springs 20, 25 are at least slightly pre-tensioned when they are mounted to the lock mechanism.
- the wire springs 20,25 serve to provide the three stable positions of the common actuator slide 13.
- the three positions of the common actuator slide 13 and the corresponding action of the lock mechanism is shown in figures 6 through 8 .
- Figure 6 shows the locked position of the locking arms 11 and the locked position of the common actuator slide 13.
- Figure 7 shows the locked position of the locking arms 11 and the intermediate ventilating position of the common actuator slide 13 and
- figure 8 shows the unlocked position of the locking arms 11 and of the common actuator slide 13.
- Figure 7a shows the actuator slide in two positions for illustration purposes.
- the lock mechanism on the right hand side of the straight guide slot 14 is partially worked open for illustrating how wire spring 25 is compressed and decompressed when the actuator slide 13 moves.
- One end of the wire spring 25 engages the link 23 at the hole in the middle of link 23 and the other end of the wire spring 25 engages the slide 13 whereby the actuator slide 13 and the link 23 are repelled.
- the joint between the link 23 and the actuator slide 13 allows some free play via the enlarged opening 24 in the link 23 whereby the link 23 and slide 13 may mutually move closer to one another and compress the wire spring 25 during the first part of the moment and move away from one another thereby allowing decompression of the wire spring 25 during the last part of the movement between the closed position and the intermediate ventilating position of the actuator slide 13.
- a first bi-stability of the lock mechanism is obtained through the action of the wire springs 25.
- the forces created by the loading and unloading of the springs 25 create a first bi-stability of the lock mechanism and thus the lock mechanism has an urge to move to either the locked position or to the intermediate ventilating position of the common actuator slide 13.
- the free play between the slide 13 and the link 23 is in the magnitude of a few millimeters and allows the slide 13 and link 23 to stroke towards and away from each other.
- the common actuator slide 13 is moved from the intermediate ventilating position of figure 7 to the unlocked position of figure 8
- the locking arms 11 are moved from the locked position of figure 7 to the unlocked position of figure 8 .
- the first part of the movement of the locking arms 11 from the locked position to the unlocked position causes the wire springs 20 to be increasingly loaded since the points at which the wire spring 20 are supported move towards each other.
- the maximum load of the wire springs 20 is reached when the locking arms 11 are approximately halfway on their way towards the unlocked position.
- the lock mechanism has therefore three stable positions: the unlocked position, the intermediate ventilating position and the locked position.
- FIGS 9 to 11 show the wire spring 20 in greater detail.
- the wire spring 20 is made from one single strand of spring wire (preferably steel spring wire). Most of the wire spring 20 lies in a single plane with the exception of the two extremities that form insertion portions 41 for insertion into openings that support the wire spring 20 when it is mounted in the lock assembly.
- the insertion portions 41 end at a sharp bend 42 and the insertion portions form a sharp angle V with the plane of the wire spring 20.
- the insertion portion 41 provides a hook directed away from the spring centre so the spring may be securely supported.
- the next portion of the wire spring 20 is denoted as the first portion 43.
- the first portion 43 is substantially straight and is directed away from the opposite end of the wire spring 20. This first portion does not need to be exactly directed in a direction opposite to the direction towards the other end, and more specifically the point at the other end where the wire spring 20,25 is supported. Instead, it is acceptable if the first portion 43 is roughly directed away from the other end of the wire spring 20,25.
- a first wire spring portion 43 can be provided at both ends of the wire spring 20.
- the first portion 43 ends at an approximately 90° bend 45 and the spring wire continues as the second portion 47 (the second position is preferably substantially straight but can be slightly curved).
- the bend 45 does not need to be exactly 90° but can be roughly between 70°and 110°
- the second portion 47 is approximately at a right angle with a imaginary line i connecting points at which the spring wire 20 is supported when it is mounted to the lock mechanism (the spring wire 20 is supported at the insertion portions 41 near the bend 42). However, the angle does not need to be exactly a right angle, it could be anywhere between approximately 70°and 110°.
- the second portion 47 is in the same plane as the first portion 43.
- the second portion 47 ends at an approximately 90° bend 49 and the spring wire continues with middle portion 50.
- Bend 49 does not need to be exactly 90° but can be roughly between 70°and 110°.
- the spring wire continues at the other end of the middle portion 50 as a mirror image of the portion of the wire spring 20 that has just been described. Bend 45 and bend 49 do not need to be sharp bends as shown in the figures, they can also have a larger radius.
- the two parts of the wire spring outside the middle portion 50 are also denoted as the outer portions.
- the middle section 50 extends roughly parallel with the imaginary line that connects the two points at which the wire spring 20 is supported.
- the middle portion 50 has a length substantially equal to or larger than the length between the two support points.
- the springs 20,25 comprise a substantially straight middle portion 50 substantially parallel with a line defined between the attachment points e.g. the points at which the spring 20,25 is supported.
- the combination of the first straight portion 43 directed away from the opposite end of the wire spring 20 in one and the same imaginary plane as the major extent of the wire spring helps to stabilize the position of the spring since the tendency of the spring to twist or bend out of the plane which is supposed to lie is reduced (spring wire 20 is supposed to lie a plane parallel to the plane of the link member 23 and parallel to the plane in which the components of the lock mechanism move. Prior art springs have had a tendency to bend out of this plane when loaded, leading to friction between the wire spring and the sash).
- the wire springs 20 and 25 are at least slightly pre-tensioned when they are mounted to the lock mechanism.
- the wire spring 20 is actually displayed in this pre-pensioned state.
- the wire spring 20 is shown in a completely relaxed state and it can be seen that the middle section is slightly curved inwardly.
- Figures 13 and 14 show the wire spring 20 and 25 as well the link member 23 and the fastening pinhead 27 in greater detail from two sides.
- wire spring 25 comprises two second portions 47, two bends 49 and a middle portion 50.
- wire spring 20 has an insertion portion that is inserted into a hole at one end of the link member 23.
- Wire spring 20 differs from wire spring 25 in that the other extremity is formed differently. This different extremity is not supported in a hole. Instead it is supported by a fastening pinhead 27.
- the fastening pinhead 27 is provided with a groove 32 for supporting this extremity of the wire spring 20.
- the groove 32 is formed as a circumferential groove in the circumference of the fastening pinhead 27.
- the wire spring 20 is curved there where it is supported by the fastening pinhead 27 and the wire spring 20 includes a curve 51 at the start of the second portion 47.
- the wire spring 20 is efficiently supported by the curved section 51 engaging in the groove 32 and, thereby, twisting or bending of the wire spring out of its plane of orientation is prevented or at least substantially reduced.
Description
- The present invention relates to a lock assembly for a ventilating window having a sash arranged to be openable with respect to a main frame by pivotal movement about an axis parallel to a pair of opposed sash members.
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WO 02/084043 - This known lock assembly has proven to be reliable, user-friendly and a generally very satisfying product, but a little bulky and there is a desire to construct a more compact lock with smaller dimensions. A more compact lock among other benefits enables a window design with better insulation.
- On this background, it is an object of the present invention to provide a lock assembly with reduced dimensions.
- This object is achieved by providing a lock assembly for a ventilating window having a sash arranged to be openable with respect to a main frame by pivotal movement about a pivot axis parallel to a pair of opposed sash members, the lock assembly comprises a casing, a locking arm, a lock mechanism arranged in the casing for enabling the locking arm to be displaceable between a first position defining an unlocked position and a second position defining a locked position, a wire spring operably connected to the lock mechanism, the wire spring being supported at a first point and at a second point, whereby the distance between the first point and the second point changes when the lock mechanism moves to another position, whereby the wire spring comprises three portions between the two points, a middle portion and two outer portions.
- The lock assembly has a middle portion that is directed roughly parallel with a line connecting the two points and/or the outer portions comprise a part that is directed roughly at a right angle with a line connecting the two points.
- By providing the wire spring with outer portions that are roughly extending in a direction at a right angle between the imaginary line connecting the two points and/or by arranging a middle portion that is directed roughly parallel with a line connecting the two points, it is possible to construct a small and compact spring that can handle large forces. The reason is that a larger portion of the material of the wire spring is bend when the wire spring is loaded. With the present construction most of the middle section of the wire spring is involved in the bending. Having smaller and stronger springs allows in turn for a more compact construction of the lock assembly.
- In the smoothly curved prior art springs only a small portion of the wire spring near the middle of the spring participates is bend when the spring is loaded and unloaded. The rest of the spring wire material of the known wire springs, which is almost all of the wire spring material does not bend and therefore not store or release energy.
- In the wire spring according to the present disclosure a substantial portion of the spring wire material of the wire spring is bend when the spring is loaded and unloaded. Therefore, much more energy can be stored in a wire spring according to the present disclosure when compared with a prior art wire spring of similar dimensions and the same spring wire material.
- Preferably, the middle portion is directed roughly parallel with the line.
- The transition between the middle section and an outer section may include sharply bent wire.
- The transition between the middle section and an outer section may include a bend in the wire sharper than 70 degrees.
- Preferably, the substantially straight middle section forms a substantial portion of the extent of the wire spring between the two points.
- In an embodiment, the middle section is only slightly curved at any position of the locking arm.
- In another embodiment, the middle section is curved when no load is applied to the wire spring, but the middle section is substantially straight and pre-tensioned when the wire spring is mounted in the lock assembly.
- The lock mechanism may include a knee joint connected to a actuator slide that is partially received in a straight guide slot.
- The lock mechanism may comprise an actuator slide operably connected to a locking arm via the knee joint and the actuator slide (13) having three stable positions, namely a locked position with the locking arm in the locked position, an unlocked position with the locking arm in the unlocked position and an intermediate position between the unlocked position and the locked position with the lock arm in the locked position when the actuator slide is in the intermediate position.
- The object above is also achieved by providing a lock assembly for a ventilating window having a sash arranged to be openable with respect to a main frame by pivotal movement about a pivot axis parallel to a pair of opposed sash members, the lock assembly comprises a casing, a locking arm, a lock mechanism arranged in the casing for enabling the locking arm to be displaceable between a first position defining an unlocked position and a second position defining a locked position, a wire spring operably connected to the lock mechanism, the wire spring being supported at a first point and at a second point, whereby the distance between the first point and the second point changes when the lock mechanism moves to another position, whereby the wire spring is at one point supported by a groove in a stationary part of the lock assembly.
- By supporting the wire spring in a groove arranged in a stationary part of the lock assembly the orientation of the wire spring is sufficiently secured in a way that takes little place, and allows easy manufacture and production. In the prior art constructions the wire spring is being provided with a helical section that was slid over a pin. However, these helical sections get entangled with one another when a number of wire springs are stored in a container. Thus, time and energy is lost for getting wire springs free from the other wire springs in the container when the wires are needed for mounting to the lock mechanism.
- In an embodiment, the wire spring is at one point supported by a fastening pin head and the groove is provided in the fastening pin head.
- Preferably, the groove is a circumferential groove in the fastening pin head.
- The wire spring may be curved in the area where the wire spring is supported by the fastening pin head.
- The object above is also achieved by providing a lock assembly for a ventilating window having a sash arranged to be openable with respect to a main frame by pivotal movement about a pivot axis parallel to a pair of opposed sash members, the lock assembly comprises a casing, a locking arm, a lock mechanism arranged in the casing for enabling the locking arm to be displaceable between a first position defining an unlocked position and a second position defining a locked position, a wire spring operably connected to the lock mechanism, the wire spring being supported at a first point and at a second point, whereby the distance between the first point and the second point changes when the lock mechanism moves to another position, whereby the first portion of the wire spring that extends from the first point towards the other end of the wire spring is substantially directed away from the second support point.
- The orientation of the wire spring is stabilized and its tendency to twist of the plane in which it is supposed to be lying is substantially reduced by directing the first portion of the wire spring away from the second support point. When the wire spring twists it can press against the sash thereby causing friction and heavy and irregular operation of the lock.
- Preferably, the first portion of the wire spring that extends from the second support point towards the other end of the wire spring is substantially directed away from the first support point.
- In an embodiment, the first portion is substantially straight and ends with a first roughly 90° bend.
- The wire spring may continue after the first roughly 90° bend with a second substantially straight portion that ends at a second roughly 90° bend.
- The wire spring may continue after the second roughly 90° bend in a substantially straight fashion and in the same plane as the first portion and the second portion with a middle portion.
- Further objects, features, advantages and properties of the lock assembly according to the invention will become apparent from the detailed description
- In the following detailed portion of the present description, the invention will be explained in more detail with reference to the exemplary embodiments shown in the drawings, in which:
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Figure 1 is an elevated view of a ventilating window in which the lock assembly can be used, -
Figure 2 is a sectional view through the upper part of a ventilating window, where a lock assembly according to an exemplary embodiment is shown, -
Figure 3 is an elevated view on the top of a lock assembly offigure 2 with the locking arms in a locking position, -
Figure 4 is an elevated view on the top of a lock assembly offigure 2 with the locking arms in a locked position, -
Figure 5 is an elevated view on the bottom of a lock assembly offigure 2 , -
Figure 6 is a bottom view of a lock assembly with the locking arms in a locking position, -
Figure 7 is a bottom view of a lock assembly with the locking arms in a locking position and an actuator slide in an intermediate position, -
Figure 7a is a partially worked open bottom view of a lock assembly with the locking arms in a locking position and an actuator two positions, -
Figure 8 is a bottom view of a lock assembly with the locking arms in an unlocked position, -
Figure 9 is a detailed side view on a wire spring used in the lock assembly offigure 2 , -
Figure 10 is a detailed top view on a wire spring used in the lock assembly offigure 2 , -
Figure 11 is a detailed top view on a wire spring used in the lock assembly offigure 2 showing deformation of the wire spring, -
Figure 12 is a detailed top view of another embodiment of a wire spring used in the lock assembly offigure 2 , -
Figure 13 is a detailed elevated view from one side on a part of the lock mechanism and the wire springs of the lock assembly offigure 2 , and -
Figure 14 is a detailed elevated view from another side on a part of the lock mechanism and the wire springs of the lock assembly offigure 2 . - In the following detailed description the lock assembly according to the invention will be described by the exemplary embodiments.
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Figures 1 and2 show a ventilation window having asash 2 arranged to be openable with respect to awindow frame 1 by pivotal movement about a pivot axis X parallel to a pair of opposed sash members. Infigure 1 thesash 2 is in an open position. Infigure 2 the sash is in a close position with an open ventilation path. - When the
sash 2 is in a closed position, ventilation is still possible through a ventilation path in the top of thesash 2. The ventilation window is provided with atop cover 4 that covers the ventilation opening in thesash 2 to protect the ventilation path from rain and the like, but anopening 6 between thetop cover 4 and thewindow pane 5 allows the passage of air. - The ventilation path extends from an
inlet 6 through thesash 2. The first part of the ventilation path is defined by thetop cover 4 and the upper outward areas of thesash 2 and thewindow frame 1. A filter covers theinlet 6 of the ventilation channel. The inwardly facing end of the ventilation path ends at a ventilation opening in thesash 2. A pivotally mountedventilation flap 7 is shown in an intermediate ventilating position. Theventilating flap 7 registers with the ventilation opening in a closed position (not shown) of theventilation flap 7 for closing the ventilation opening and thereby preventing passage of air through the ventilation path. Ahandle bar 8 for an operator is connected to theventilation flap 7. Alock 10 is mounted in the ventilation opening in thesash 2. The lock is 10 described in greater detailed further below. The lock includes one or more movable lockingarms 11 that can engage astriking plate 12 that is mounted on thewindow frame 1. - A
link 9 to lock 10 operably connects theventilation flap 7 to thelock 10. Theventilation flap 7 has a closed position, an intermediate ventilation position and a fully open position. In the intermediate ventilation position (shown) theventilation flap 7 does not register with the ventilation opening so it allows passage of air through the ventilation path, but thelock 10 is in a locking position and themovable locking arms 11 engage thestriking plate 12 and prevent opening of the window. Thelock 10 is also in the locked position when theventilation flap 7 is in the closed position. When theventilation flap 7 is in the fully open position, themovable locking arms 11 do not engage thestriking plate 12 and the window can be opened.Figures 3 and 4 show thelock assembly 10 in the unlocked and locked position of the lockingarms 11, respectively. The lockingarms 11 can engage a well-known type of striking plate with a specific shape and dimensions.
The lock assembly comprises acasing 15 of for example cast metal or plate metal. The casing 15 houses the lock mechanism that will be described in detail further below. The casing is provided with a centrally locatedstraight guide slot 14. On each side of theguide slot 14 the casing is provided with acurve slot 18. - A
common actuator slide 13 is partially received in thestraight guide slot 14 and allows thecommon actuator slide 13 to move back and forth in thestraight guide slot 14. Infigure 3 thecommon actuator slide 13 is in the unlocked position, and infigure 4 in thecommon actuator slide 13 is in the intermediate ventilating position. - A portion of the locking
arms 11 protrudes from thecasing 15 through the respectivecurved guide slot 18. A lining 17 of plastic or other soft material around a portion of the lockingarms 11 fits into thecurved guide slot 18 and serves noise reduction. Thus, the lining 17 moves in unison with therespective locking arm 11. -
Figure 5 shows the lock assembly from below and gives a view of the lock mechanism. Thecommon actuator slide 13 is provided with a plate on the inside of thecasing 15. At opposite ends of the plate thecommon actuator slide 13 pivotally connects to one end oflink members 23. The other end of thelink member 23 is pivotally connected to alocking arm 11. A lockingarm 11 forms together with alink member 23 and the common actuator slide 13 a knee joint. There is a lockingarm 11 on each side of thestraight guide slot 14, and each locking arm is connected to thecommon actuator slide 13 via alink member 23 to form a knee joint. - Two
fastening pinheads 27 project downwardly from thecasing 15. Thesefastening pinheads 27 serve to facilitate precise mounting of the lock assembly onto thesash 2. Hereto the sash is provided with bores in which the lockingpinheads 27 are partially received. - The lock mechanism includes four wire springs: two wire springs 20 and two wire springs 25. The wire springs 20,25 can be made of steel spring wire.
- A
first wire spring 20 is supported at one end by afastening pinhead 27 and at its other end at the pivot axis between the lockingarm 11 and thelink member 23. Asecond wire spring 20 is identically supported by thefastening pinhead 27 and the pivot axis between lockingarm 11 and thelink member 23 on the other side of thecommon actuator slide 13. - The
first wire spring 25 is supported at one end by a central hole in one of thelink members 23 and thefirst wire spring 25 is supported at its other end in a hole at the pivot axis between thelink member 23 and thecommon actuator slide 13. Thesecond wire spring 25 is identically supported by a central hole in thelink member 23 on the other side of the common slide and in a hole at the pivot axis between thislink member 23 and thecommon slide 13. - Preferably, the wire springs 20, 25 are at least slightly pre-tensioned when they are mounted to the lock mechanism.
- The wire springs 20,25 serve to provide the three stable positions of the
common actuator slide 13. The three positions of thecommon actuator slide 13 and the corresponding action of the lock mechanism is shown infigures 6 through 8 .Figure 6 shows the locked position of the lockingarms 11 and the locked position of thecommon actuator slide 13.Figure 7 shows the locked position of the lockingarms 11 and the intermediate ventilating position of thecommon actuator slide 13 andfigure 8 shows the unlocked position of the lockingarms 11 and of thecommon actuator slide 13. - When the
common actuator slide 13 moves from the locked position offigure 6 to the intermediate ventilating position offigure 7 , the support points of the wire springs 25 are brought closer to one another during the first part of the moment and move away from one another during the last part of the movement towards the intermediate ventilating position. Thus, the forces created by the loading and unloading of thesprings 25 create a bistable mechanism that has an urge to move to either the locked position or to the intermediate ventilating position of thecommon actuator slide 13, with thecommon actuator slide 13 having two stable positions, namely the locked position and the intermediate position. -
Figure 7a shows the actuator slide in two positions for illustration purposes. The lock mechanism on the right hand side of thestraight guide slot 14 is partially worked open for illustrating howwire spring 25 is compressed and decompressed when theactuator slide 13 moves. One end of thewire spring 25 engages thelink 23 at the hole in the middle oflink 23 and the other end of thewire spring 25 engages theslide 13 whereby theactuator slide 13 and thelink 23 are repelled. - The joint between the
link 23 and theactuator slide 13 allows some free play via theenlarged opening 24 in thelink 23 whereby thelink 23 and slide 13 may mutually move closer to one another and compress thewire spring 25 during the first part of the moment and move away from one another thereby allowing decompression of thewire spring 25 during the last part of the movement between the closed position and the intermediate ventilating position of theactuator slide 13. Thus, a first bi-stability of the lock mechanism is obtained through the action of the wire springs 25. The forces created by the loading and unloading of thesprings 25 create a first bi-stability of the lock mechanism and thus the lock mechanism has an urge to move to either the locked position or to the intermediate ventilating position of thecommon actuator slide 13.
The free play between theslide 13 and thelink 23 is in the magnitude of a few millimeters and allows theslide 13 and link 23 to stroke towards and away from each other. When thecommon actuator slide 13 is moved from the intermediate ventilating position offigure 7 to the unlocked position offigure 8 , the lockingarms 11 are moved from the locked position offigure 7 to the unlocked position offigure 8 . The first part of the movement of the lockingarms 11 from the locked position to the unlocked position causes the wire springs 20 to be increasingly loaded since the points at which thewire spring 20 are supported move towards each other. The maximum load of the wire springs 20 is reached when the lockingarms 11 are approximately halfway on their way towards the unlocked position. During the last half of the movement of the lockingarms 11 towards the unlocked position the load on the wire springs 20 is reduced and the wire springs 20 are unloaded since the points at which thewire spring 20 is supported to move away from one another. Thus, a second bi-stability of the lock mechanism is obtained through thesprings 20. The forces created by the loading and unloading of thesprings 20 create a second bi-stability of the lock mechanism and thus the lock mechanism has an urge to move to either the unlocked position or to the intermediate ventilating position of thecommon actuator slide 13, with thecommon actuator slide 13 having two stable positions, namely the unlocked position and the intermediate position. - Altogether, the lock mechanism has therefore three stable positions: the unlocked position, the intermediate ventilating position and the locked position.
-
Figures 9 to 11 show thewire spring 20 in greater detail. Thewire spring 20 is made from one single strand of spring wire (preferably steel spring wire). Most of thewire spring 20 lies in a single plane with the exception of the two extremities that forminsertion portions 41 for insertion into openings that support thewire spring 20 when it is mounted in the lock assembly. Theinsertion portions 41 end at asharp bend 42 and the insertion portions form a sharp angle V with the plane of thewire spring 20. Theinsertion portion 41 provides a hook directed away from the spring centre so the spring may be securely supported. - The next portion of the
wire spring 20 is denoted as thefirst portion 43. Thefirst portion 43 is substantially straight and is directed away from the opposite end of thewire spring 20. This first portion does not need to be exactly directed in a direction opposite to the direction towards the other end, and more specifically the point at the other end where thewire spring first portion 43 is roughly directed away from the other end of thewire spring wire spring portion 43 can be provided at both ends of thewire spring 20. Thefirst portion 43 ends at an approximately 90°bend 45 and the spring wire continues as the second portion 47 (the second position is preferably substantially straight but can be slightly curved). Thebend 45 does not need to be exactly 90° but can be roughly between 70°and 110° Thesecond portion 47 is approximately at a right angle with a imaginary line i connecting points at which thespring wire 20 is supported when it is mounted to the lock mechanism (thespring wire 20 is supported at theinsertion portions 41 near the bend 42). However, the angle does not need to be exactly a right angle, it could be anywhere between approximately 70°and 110°. Thesecond portion 47 is in the same plane as thefirst portion 43. Thesecond portion 47 ends at an approximately 90°bend 49 and the spring wire continues withmiddle portion 50.Bend 49 does not need to be exactly 90° but can be roughly between 70°and 110°. The spring wire continues at the other end of themiddle portion 50 as a mirror image of the portion of thewire spring 20 that has just been described.Bend 45 and bend 49 do not need to be sharp bends as shown in the figures, they can also have a larger radius. - The two parts of the wire spring outside the
middle portion 50 are also denoted as the outer portions. Themiddle section 50 extends roughly parallel with the imaginary line that connects the two points at which thewire spring 20 is supported. Themiddle portion 50 has a length substantially equal to or larger than the length between the two support points. Thesprings middle portion 50 substantially parallel with a line defined between the attachment points e.g. the points at which thespring - The combination of the first
straight portion 43 directed away from the opposite end of thewire spring 20 in one and the same imaginary plane as the major extent of the wire spring helps to stabilize the position of the spring since the tendency of the spring to twist or bend out of the plane which is supposed to lie is reduced (spring wire 20 is supposed to lie a plane parallel to the plane of thelink member 23 and parallel to the plane in which the components of the lock mechanism move. Prior art springs have had a tendency to bend out of this plane when loaded, leading to friction between the wire spring and the sash). - As shown in
figure 11 , a major portion of themiddle portion 50 of thewire spring 20 is involved in the bending of the spring wire material when the ends of thewire spring 20 are moved (either away from one another or towards one another). This is in great contrast to the prior art springs that consisted of a single curve between the points of support, causing only a small portion in the middle of the spring wire to be involved in the bending of the spring wire material. Thus, greater spring forces can be generated with a small spring with the wire spring according to the present disclosure. - Preferably, the wire springs 20 and 25 are at least slightly pre-tensioned when they are mounted to the lock mechanism. In
figures 9 and 10 thewire spring 20 is actually displayed in this pre-pensioned state. Infigure 12 thewire spring 20 is shown in a completely relaxed state and it can be seen that the middle section is slightly curved inwardly. Alternatively, it is possible to use wire springs in which the middle section is substantially straight in the relaxed state of the wire spring. -
Figures 13 and 14 show thewire spring link member 23 and thefastening pinhead 27 in greater detail from two sides. Similar to wirespring 20,wire spring 25 comprises twosecond portions 47, twobends 49 and amiddle portion 50. At one of itsextremities wire spring 20 has an insertion portion that is inserted into a hole at one end of thelink member 23.Wire spring 20 differs fromwire spring 25 in that the other extremity is formed differently. This different extremity is not supported in a hole. Instead it is supported by afastening pinhead 27. Thefastening pinhead 27 is provided with agroove 32 for supporting this extremity of thewire spring 20. Thegroove 32 is formed as a circumferential groove in the circumference of thefastening pinhead 27. Thewire spring 20 is curved there where it is supported by thefastening pinhead 27 and thewire spring 20 includes acurve 51 at the start of thesecond portion 47. Thewire spring 20 is efficiently supported by thecurved section 51 engaging in thegroove 32 and, thereby, twisting or bending of the wire spring out of its plane of orientation is prevented or at least substantially reduced. - Although the present invention has been described in detail for purpose of illustration, it is understood that such detail is solely for that purpose, and variations can be made therein by those skilled in the art without departing from the scope of the invention as defined by the appended claims. The term "comprising" as used in the claims does not exclude other elements or steps. The term "a" or "an" as used in the claims does not exclude a plurality.
Claims (11)
- A lock assembly (10) for a ventilating window having a sash (2) arranged to be openable with respect to a main frame (1) by pivotal movement about a pivot axis (X) parallel to a pair of opposed sash members, said lock assembly (10) comprising:a casing (15),a locking arm (11),a lock mechanism arranged in said casing (15) for enabling the locking arm (11) to be displaceable between a first position defining an unlocked position and a second position defining a locked position,- said lock mechanism comprising an actuator slide (13) operably connected to said locking arm (11) via a link member (23) pivotally connected to said locking arm (11) at a first pivotal connection and to said actuator slide (13) at a second pivotal connection,- - said actuator slide (13) having three stable positions, namely a locked position with the locking arm (11) in the locked position, an unlocked position with the locking arm (11) in the unlocked position and an intermediate position between said unlocked position and said locked position with the lock arm (11) in the locked position when the actuator slide (13) is in the intermediate position,- a first wire spring (20) connected at a first end thereof to said locking arm (11) and connected at a second end thereof to said casing (15), whereby the distance between said first end and said second end changes when the lock mechanism moves to another position,- a second wire spring (25) connected at a first end thereof to said link member (23) and connected at a second end thereof to said actuator slide,- characterized in said first wire spring (20) comprising three portions between said two ends, namely a middle portion (50) and two outer portions, wherein the middle portion (50) is directed roughly parallel with a line connecting the two ends and/or the outer portions comprising a part that is directed roughly at a right angle with a line connecting the two ends.
- A lock assembly according to claim 1, wherein said first wire spring (20) is received in a groove (32) in a stationary part of the lock assembly (10).
- A lock assembly (10) for a ventilating window having a sash (2) arranged to be openable with respect to a main frame (1) by pivotal movement about a pivot axis (X) parallel to a pair of opposed sash members, said lock assembly (10) comprising:a casing (15),a locking arm (11),a lock mechanism arranged in said casing (15) for enabling the locking arm (11) to be displaceable between a first position defining an unlocked position and a second position defining a locked position,- said lock mechanism comprising an actuator slide (13) operably connected to said locking arm (11) via a link member (23) pivotally connected to said locking arm (11) at a first pivotal connection and to said actuator slide (13) at a second pivotal connection,- - said actuator slide (13) having three stable positions, namely a locked position with the locking arm (11) in the locked position, an unlocked position with the locking arm (11) in the unlocked position and an intermediate position between said unlocked position and said locked position with the lock arm (11) in the locked position when the actuator slide (13) is in the intermediate position,- a first wire spring (20) connected at a first end thereof to said locking arm (11) and connected at a second end thereof to said casing (15),- a second wire spring (25) connected at a first end thereof to said link member (23) and connected at a second end thereof to said actuator slide (13), whereby the distance between said first end and said second end changes when the lock mechanism moves to another position,- said second wire spring (25) comprising three portions between said two ends, namely a middle portion and two outer portions and wherein the middle portion (50) is directed roughly parallel with a line connecting the two ends and/or the outer portions comprising a part that is directed roughly at a right angle with a line connecting the two ends.
- A lock assembly according to claim 3, wherein the second wire spring (25) is received in a hole in said link member (23) .
- A lock assembly according to claim 3 or 4, including an enlarged opening (24) in said link member (23) at said second pivotal connection; said enlarged opening receiving said second wire spring (25).
- A lock assembly (10) according to any of the preceding claims, wherein the transition between said middle portion and an outer portion comprises a sharp bend.
- A lock assembly according to any of the preceding claims, wherein the transition between said middle portion and an outer portion comprises a bend in the wire sharper than 70 degrees.
- A lock assembly according to any of the preceding claims, wherein said middle portion is substantially straight and forms a substantial portion of the extent of said wire spring between said two ends.
- A lock assembly according to any of the preceding claims, wherein said middle portion is only slightly curved at any position of said locking arm (11).
- A lock assembly according to any of the preceding claims, wherein said middle portion is curved when no load is applied to said wire spring (20, 25), but the middle portion is substantially straight and pre-tensioned when the wire spring (20,25) is mounted in the lock assembly.
- A lock assembly according to any of the preceding claims, wherein said actuator slide (13) is partially received in a straight guide slot (14).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL10857199T PL2616612T3 (en) | 2010-09-16 | 2010-09-16 | A lock assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DK2010/000127 WO2012034558A1 (en) | 2010-09-16 | 2010-09-16 | A lock assembly |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2616612A1 EP2616612A1 (en) | 2013-07-24 |
EP2616612A4 EP2616612A4 (en) | 2017-12-27 |
EP2616612B1 true EP2616612B1 (en) | 2018-10-24 |
Family
ID=45831024
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10857199.3A Active EP2616612B1 (en) | 2010-09-16 | 2010-09-16 | A lock assembly |
Country Status (3)
Country | Link |
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EP (1) | EP2616612B1 (en) |
PL (1) | PL2616612T3 (en) |
WO (1) | WO2012034558A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2796656B1 (en) * | 2013-04-25 | 2017-02-22 | VKR Holding A/S | Ventilation assembly for a ventilating window |
DK178238B1 (en) | 2014-03-03 | 2015-09-21 | Vkr Holding As | A ventilation and operating assembly having a locking device |
DE102015200610A1 (en) * | 2014-05-22 | 2015-11-26 | D+H Mechatronic Ag | Actuating arrangement for a building closure and building closure with an actuating arrangement |
DE102014007841A1 (en) * | 2014-05-22 | 2015-12-17 | Roto Frank Ag | Skylight and method for mounting a skylight |
DK180431B1 (en) * | 2018-09-24 | 2021-04-23 | Vkr Holding As | A roof window with an improved lock casing |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3360290A (en) * | 1966-01-06 | 1967-12-26 | Gray William G De | Lock construction |
US5618066A (en) * | 1995-11-13 | 1997-04-08 | Fu-Hsiang; Chen | Automatic latch device |
US5746455A (en) * | 1996-04-29 | 1998-05-05 | Takigen Manufacturing Co. Ltd. | Gate or door spring-biased bolt latch |
DE60234998D1 (en) * | 2001-04-11 | 2010-02-25 | Vkr Holding As | LOCKING DEVICE FOR A VENTILATION WINDOW |
US6871451B2 (en) * | 2002-03-27 | 2005-03-29 | Newell Operating Company | Multipoint lock assembly |
WO2007071262A1 (en) * | 2005-12-22 | 2007-06-28 | Vkr Holding A/S | A noise reducing locking assembly for a ventilating window |
-
2010
- 2010-09-16 PL PL10857199T patent/PL2616612T3/en unknown
- 2010-09-16 WO PCT/DK2010/000127 patent/WO2012034558A1/en active Application Filing
- 2010-09-16 EP EP10857199.3A patent/EP2616612B1/en active Active
Non-Patent Citations (1)
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None * |
Also Published As
Publication number | Publication date |
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EP2616612A1 (en) | 2013-07-24 |
WO2012034558A1 (en) | 2012-03-22 |
EP2616612A4 (en) | 2017-12-27 |
PL2616612T3 (en) | 2019-04-30 |
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