GB2429039A - Lock assembly with first and second return spring assemblies acting on handle - Google Patents

Lock assembly with first and second return spring assemblies acting on handle Download PDF

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Publication number
GB2429039A
GB2429039A GB0516633A GB0516633A GB2429039A GB 2429039 A GB2429039 A GB 2429039A GB 0516633 A GB0516633 A GB 0516633A GB 0516633 A GB0516633 A GB 0516633A GB 2429039 A GB2429039 A GB 2429039A
Authority
GB
United Kingdom
Prior art keywords
spring
assembly
handle
lock
lock assembly
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.)
Withdrawn
Application number
GB0516633A
Other versions
GB0516633D0 (en
Inventor
Martin Stace
Gary Brookes
Simon James Baker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Assa Abloy Ltd
Original Assignee
Assa Abloy Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Assa Abloy Ltd filed Critical Assa Abloy Ltd
Priority to GB0516633A priority Critical patent/GB2429039A/en
Publication of GB0516633D0 publication Critical patent/GB0516633D0/en
Priority to EP06766153A priority patent/EP1913217B1/en
Priority to PCT/IL2006/000837 priority patent/WO2007020623A2/en
Priority to ARP060103313 priority patent/AR054884A1/en
Priority to TW095128514A priority patent/TW200720519A/en
Publication of GB2429039A publication Critical patent/GB2429039A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • E05B3/00—Fastening knobs or handles to lock or latch parts
    • E05B3/06—Fastening knobs or handles to lock or latch parts by means arranged in or on the rose or escutcheon
    • E05B3/065—Fastening knobs or handles to lock or latch parts by means arranged in or on the rose or escutcheon with spring biasing means for moving the handle over a substantial distance, e.g. to its horizontal position
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C1/00—Fastening devices with bolts moving rectilinearly
    • E05C1/08—Fastening devices with bolts moving rectilinearly with latching action
    • E05C1/12—Fastening devices with bolts moving rectilinearly with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch
    • E05C1/16—Fastening devices with bolts moving rectilinearly with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch the handle or member moving essentially in a plane substantially parallel to the wing or frame
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B1/00—Knobs or handles for wings; Knobs, handles, or press buttons for locks or latches on wings
    • E05B1/0053—Handles or handle attachments facilitating operation, e.g. by children or burdened persons
    • 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
    • E05B2015/0431—Modifying spring characteristic or tension
    • 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
    • E05B2015/0448—Units of springs; Two or more springs working together
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B59/00—Locks with latches separate from the lock-bolts or with a plurality of latches or lock-bolts
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B65/00—Locks or fastenings for special use
    • E05B65/08—Locks or fastenings for special use for sliding wings
    • E05B65/0811—Locks or fastenings for special use for sliding wings the bolts pivoting about an axis perpendicular to the wings

Abstract

A lock assembly for a door comprises a casing 1, a locking mechanism arranged at least partly within the casing and having a latch bolt 8, a handle in operative connection with the latch bolt 8, a first spring assembly 19 for applying a first return force to the handle and a second spring assembly 20 for applying a second return force to the handle. The provision of a second spring assembly enables an additional return force to act upon the handle in use of the lock assembly. The first and second spring assemblies may comprise helical compression springs. The second spring assembly may comprise a pivotally mounted housing. The door handle may comprise a lever 16 having two lever arms 17, 14 for tramsmitting a force to the latch bolt 8, and a projection 28 cooperating with the second spring assembly 20.

Description

Lock assembly The invention relates to lock assemblies.
Certain lock assemblies include a movable hook-like latch, known as a hook bolt, which can engage with a strike provided upon the door surround at the location in which the lock will abut the door surround when the door is closed.
The lock assembly is mortise fitted within a recess that opens at the side edge of the door, that is, the edge that, when the door is closed, abuts the adjacent surface of the door surround.
Many conventional lock assemblies include a handle, which for secure locking of the door must be returned to its starting position after the door is closed. It is usual to include a spring return system for returning the handle to its starting or rest position. In the use of the existing lock assemblies, however, the spring system does not always fully return the handle.
It would be desirable for a lock assembly to allow for the spring force acting to return the handle to be increased, if desired or if necessary to return the handle to its starting position.
The invention provides a lock assembly for a door, comprising: a casing; a locking mechanism arranged at least partly within the casing and having a latch bolt; a handle, the handle being in operative connection with the latch bolt; a first spring assembly for applying a first return force to the handle; and a second spring assembly for applying a second return force to the handle.
The provision of a second spring assembly allows the return force acting upon the handle to be adjusted to meet desired or required conditions. For example, the second spring assembly allows an increased return force to be selected where the handle is relatively heavy and/or where the lock furniture is unsprung.
It is preferred for the second spring system to be activated before the lock is fitted. In general, the second spring system will not be capable of activation after the lock assembly has been fitted into a door. For example, an activating device for the second spring assembly may be so arranged that it is concealed after the lock assembly has been fitted. Arrangements in which the second spring system can be activated after the lock has been fitted are not, however, excluded.
The first spring system preferably includes a compression spring. Compression spring arrangements for applying a return force to a handle in a door lock are known and the first spring system may be a conventional compression spring arrangement of the type previously used in mortise locks for that purpose. The compression spring may be a helical compression spring.
The second spring assembly provided in accordance of the invention may comprise a compression spring. It is preferred for the spring to be a helical compression spring.
It is preferred for the second spring assembly to include a pivotably mounted housing. In a preferred arrangement, the door handle comprises a lever having two lever arms for transmitting a force from the first spring assembly to the latch bolt, and having a further projection which in use cooperates with the second spring assembly. A first said lever arm may be arranged to act upon a bolt assembly comprising a spring and the latch bolt. The second spring assembly is advantageously arranged to apply a return force to the handle even when the latter is fully returned to its starting position.
The invention further provides a method of fitting a lock assembly in a door, comprising providing a primary spring assembly for applying a return force to a handle of the lock assembly and effecting adjustment of a secondary spring assembly, the secondary spring assembly being so adjusted that it influences a total return force applied to the handle, and fitting the lock assembly into a door.
By way of example, an embodiment of the invention will now be described with reference to the accompanying drawings, of which: Fig. 1 is a perspective view from below of a lock assembly for a door according to one embodiment of the invention; Fig. 2 is a side view of the lock assembly of Fig. 1; Fig, 3 is a side view of a lower part of the lock assembly with its casing removed and with a second spring assembly shown in a non-operative position; Fig. 4 is a side view of the lower part of the assembly from the same side as Fig. 3 and with the second spring assembly in an operative position; and Fig. 5 is a perspective view of the second spring assembly.
With reference to Figs. 1 and 2, the lock assembly is in many respects conventional. It is a mortise lock and includes a lock casing 1 into which the locking mechanism of the lock is fitted. The lock casing 1 includes a front faceplate 2 and a rear wall 3. The lock casing also includes opposed side walls 4 and opposed upper and lower walls 5,6.
The lock assembly is suitable for use in a variety of doors, for example, but not exclusively, in a sliding door.
It includes a hook bolt 7 and a retractable bevelled latch bolt 8, which are arranged in the vicinity of corresponding apertures in the faceplate 2. The hook bolt 7 is arranged to be interlockable with a strike mounted on the door surround, for example with a cooperating member or aperture provided on the strike. The latch bolt 8 is so arranged that it can be advanced into a corresponding aperture in the strike. The cooperating member and strike are not shown in the drawings. The lock assembly is designed to be mortise fitted within the section of a part of the door, typically within a frame section of the door. When received within the door, the housing of the lock assembly is concealed except for the faceplate 2, which is arranged to be substantially level with the surrounding surface of the side edge of the door. Items of lock furniture may be added to the assembly, for example, a lock cylinder (not shown in Fig. 1) may be provided in aperture 9 and extend through the front face of the door. A lock cylinder located level with the hook bolt 7 is operable by a key to extend or retract the hook bolt 7. The lock cylinder is in inverted orientation relative to conventional lock arrangements.
That facilitates opening of the door and is in particular advantageous where the door is to be used by disabled persons. The structure and operation of the lock cylinder and hook bolt 7 are otherwise conventional.
Other lock furniture may be attached to the lock assembly. For example, a handle may be mounted in square aperture 10.
In Fig. 3 there is shown a lower part of the lock assembly with external walls omitted and with certain parts of the lock mechanism omitted for ease of illustration.
The latch bolt 8 and its operating mechanism are located in the lower part of the assembly shown in Fig. 3.
The latch bolt 8 is retractable and extendable through an aperture in the faceplate 2 by means of a slidable member 13 which can be advanced and retracted by a lever arm 14.
The slidable member 13 has a ratchet edge 15 which can interlock with a deadlock mechanism (not shown) so as to enable the latch bolt to be locked in the closed position when desired. The latch bolt mechanism includes a compression spring 13a. Except for the ratchet edge 15 and the interaction with lever arm 14 further described below, the structure and operation of the latch bolt, the slidable member 13 and the associated spring 13a are essentially conventional and do not therefore require more detailed description. A lever 16 comprising the lever arm 14 and a further lever arm 17 is mounted about a square shaft 18 of a door handle. The second lever arm 17 is acted upon by a first spring assembly 19. A second spring assembly 20 is shown adjacent to the second lever arm 17. First spring assembly 19 includes a fixedly mounted stop 21 and a movable plate 22 between which is located a compression spring 23.
An elongate shaft 24 extends from the stop 21 along the inside of the spring towards the movable plate. A hollow tubular body 25 extends from the movable plate 22 towards the stop 21, and surrounds the shaft 24 for a part of its length. The tubular body 25 is axially movable with respect to the shaft 24 on movement of the movable plate 20. The tubular body 25 is made up of a proximal length 26, extending from the plate 22, and a distal length 27, having an enlarged internal and external diameter relative to the proximal length.
The second lever arm 17 of the lever 16 contacts the movable plate 22 and, on turning of the door handle is caused by the rotary movement of shaft 18 to impart translational movement to plate 22, compressing spring 23.
The arrangement is such that, when the handle is operated and the lever moved in a clockwise direction, the spring 23 is compressed, as a consequence of which the spring assembly applies a return force to the lever arm 17 urging the handle shaft 18 and the handle back to their starting position.
The lever 16 is additionally provided with a projection 28, the function of which is described in more detail with reference to Fig. 4 below.
The second spring assembly 20, which is described in more detail with reference to Fig. 5, is associated with a switch mechanism 29 including a button 30 received in a member 31 that is configured to be received in a recess in the casing of the lock assembly.
Referring to Fig. 4, the parts shown are as in Fig. 3 except that the second spring assembly 20 is arranged in an operative position in which an end is in contact with the projection 28. In that manner, a compressing force is applied to the spring assembly 20 when the shaft 18 is turned using the door handle so as to retract the latch bolt 8. As a consequence thereof, the spring assembly 20 applies a returning force to projection 28, and thus to the door handle, whenever the handle is in a position other than its usual rest position.
With reference to Fig. 5, the second spring assembly 20 has a housing 32 having first end 33, second end 34 and pivots 35, 36 which are arranged to be received in corresponding apertures in the casing of the lock assembly (those apertures not being visible in Figs. 3 and 4 in which the casing is omitted) . The housing has opposed slots 37.
The first end 33 has a cap having a central aperture 38 surrounded by a substantially annular portion 39 the inside surface of which provides a bearing surface for a first end of a compression spring 40 associated with the cap and extending axially along the interior of the housing 32. An end piece 41 is fixed into the other end 42 of the spring 40. The end piece 41 has two opposed projections 43, 44 which engage slidingly in the opposed slots 37. A central recess 45 (see Figs. 3 and 4) is provided in the outer surface of end piece 41 for receiving a curved edge 46 of the projection 28. The projection 28 and the spring assembly 20 are so arranged that, when the spring assembly is in the operative position shown in Fig. 4, rotation of the lever 16 in the clockwise direction causes the projection 28 to apply a compression force to the spring 40 via the end piece 41 upon which the projection 28 acts. As a result the spring 40 is compressed axially within the housing 32, the projections 43, 44 being slidably retained in the slots 37 whilst the slots 37 also permit the adjacent, planar, portion of the projection 28 to follow the end piece 41 axially along the housing 32 and to continue pressing against the end piece 41 whilst turning of the lever 16 continues. Upon release of the door handle, the compressed spring 40 applies a return force upon the projection 28 tending to return that projection to the starting position shown in Fig. 4.
On the external surface of housing 32 near the second end 34 there is provided a projecting member 47 having a cut-out region 48 between two arms 49, 50.
The lock assembly includes a mechanism for transferring the second spring assembly 20 from the inoperative position in Fig. 3 to the operative position in Fig. 4, the mechanism comprising the slide 30 and the projecting member 47 of the second spring assembly 20. A rear element 51 of the slide protrudes through an aperture (not visible in the drawings) in the slide member 31 and can cooperate with the cut-out 48.
By sliding the slide 30 to the right, the spring assembly 19 can be pivoted upwards by means of the element 49 engaging in the cut-out 48 and acting upon the right hand arm 50 to cause pivoting of the spring assembly about pivots 35, 36 and urging the end piece 41 into contact with the projection 28. Once the projection becomes engaged in the central recess in end piece 41, the return of the spring assembly 20 to the inoperative position is deterred.
In use, the handle is turned by the user causing clockwise rotation of lever 16, with the lever arm 17 acting upon the first spring assembly 19 and the projection 28 acting upon second spring assembly 20. The second spring assembly 20 augments the action of first spring assembly 17, assisting in urging the lever 16, and thus the associated handle, back to its starting position.
Should augmenting of the action of the first spring assembly not be required, for example because the door is to be used in an area where children, or elderly or disabled people may need to use it, the lock assembly can be used without bringing the second spring assembly into the operative position.
The lock assembly can be fitted in essentially the same manner as conventional mortise locks. Before placing the lock assembly within the door, however, the switch device is, if desired, activated to cause the second spring assembly to operate and thus to influence the return force on the handle after the lock as been fitted. Alternatively, the switch device may be deactivated such that the second spring assembly is not operational after the lock has been fitted. Once the lock has been fitted, the switch device is concealed behind the face of the door.
Whilst there is described above a mortise lock assembly having a hook bolt, it will be apparent that the invention is applicable to any mortise lock, including mortise locks having hook bolts or other types of bolt, and which are suitable for any kind of door, including hinged doors or sliding doors.

Claims (12)

  1. Claims 1. A lock assembly for a door, comprising: a casing; a locking
    mechanism arranged at least partly within the casing and having a latch bolt; a handle, the handle being in operative connection with the latch bolt; a first spring assembly for applying a first return force to the handle; and a second spring assembly for applying a second return force to the handle.
  2. 2. A lock assembly according to claim 1, in which the second spring assembly can be activated before the lock is fitted.
  3. 3. A lock assembly according to claim 1 or claim 2, in which first spring assembly includes a compression spring.
  4. 4. A lock assembly according to claim 3, in which the compression spring is a helical compression spring.
  5. 5. A lock assembly according to claim 4, in which the second spring assembly comprises a compression spring.
  6. 6. A lock assembly according to claim 5, in which the spring is a helical compression spring.
  7. 7. A lock assembly according to any one of the preceding claims, in which the second spring assembly includes a pivotably mounted housing.
  8. 8. A lock assembly according to any one of the preceding claims, in which the door handle comprises a lever having two lever arms for transmitting a force from the first spring assembly to the latch bolt, and having a further projection which in use cooperates with the second spring io assembly.
  9. 9. A lock assembly according claim 8, in which a first said lever arm is arranged to act upon a bolt assembly comprising a spring and the latch bolt.
  10. 10. A lock assembly according to claim 8, in which the second spring assembly is arranged to apply a return force to the handle even when the latter is fully returned to its starting position.
  11. 11. A lock assembly substantially as described herein with reference to and as illustrated by the accompanying drawings.
  12. 12. A method of fitting a lock assembly in a door, comprising providing a primary spring assembly for applying a return force to a handle of the lock assembly and effecting adjustment of a secondary spring assembly, the secondary spring assembly being so adjusted that it influences a total return force applied to the handle, and fitting the lock assembly into a door.
GB0516633A 2005-08-12 2005-08-12 Lock assembly with first and second return spring assemblies acting on handle Withdrawn GB2429039A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB0516633A GB2429039A (en) 2005-08-12 2005-08-12 Lock assembly with first and second return spring assemblies acting on handle
EP06766153A EP1913217B1 (en) 2005-08-12 2006-07-19 Features for convenient mortise lock installation
PCT/IL2006/000837 WO2007020623A2 (en) 2005-08-12 2006-07-19 Features for convenient mortise lock installation
ARP060103313 AR054884A1 (en) 2005-08-12 2006-07-28 A LOCK ASSEMBLY EMBEDDED WITH CONVENIENT FEATURES FOR INSTALLATION
TW095128514A TW200720519A (en) 2005-08-12 2006-08-03 Features for convenient mortise lock installation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0516633A GB2429039A (en) 2005-08-12 2005-08-12 Lock assembly with first and second return spring assemblies acting on handle

Publications (2)

Publication Number Publication Date
GB0516633D0 GB0516633D0 (en) 2005-09-21
GB2429039A true GB2429039A (en) 2007-02-14

Family

ID=35098252

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0516633A Withdrawn GB2429039A (en) 2005-08-12 2005-08-12 Lock assembly with first and second return spring assemblies acting on handle

Country Status (1)

Country Link
GB (1) GB2429039A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1975420A1 (en) * 2007-03-29 2008-10-01 Sotralu Device for screw assembly of at least one rigid part on a support and opening equipped with such a device
EP2711490A1 (en) * 2012-09-21 2014-03-26 Burg-Wächter Kg Device for moving a translatory movable body and lock with a bolt

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113236027A (en) * 2021-04-23 2021-08-10 易建华 Unlocking and locking structure of intelligent lock

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB603832A (en) * 1945-11-30 1948-06-23 Herbert George Smith Improvements in latches
GB1125379A (en) * 1966-04-14 1968-08-28 Legge & Company Ltd J Improvements in or relating to latches
EP0354634A2 (en) * 1988-08-09 1990-02-14 Colin Sidney Middleton Improvements in mortice latches
EP0761912A1 (en) * 1995-09-05 1997-03-12 Von Duprin, Inc. Door handle locking mechanism with dual function springs
EP0773337A1 (en) * 1995-11-10 1997-05-14 eff-eff Fritz Fuss GmbH & Co. Kommanditgesellschaft auf Aktien Latch lock
FR2776695A1 (en) * 1998-03-31 1999-10-01 Ferco Int Usine Ferrures Door or window lock with return pusher
GB2358666A (en) * 2000-01-31 2001-08-01 Micota Mortice latches with reversible bolt heads

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB603832A (en) * 1945-11-30 1948-06-23 Herbert George Smith Improvements in latches
GB1125379A (en) * 1966-04-14 1968-08-28 Legge & Company Ltd J Improvements in or relating to latches
EP0354634A2 (en) * 1988-08-09 1990-02-14 Colin Sidney Middleton Improvements in mortice latches
EP0761912A1 (en) * 1995-09-05 1997-03-12 Von Duprin, Inc. Door handle locking mechanism with dual function springs
EP0773337A1 (en) * 1995-11-10 1997-05-14 eff-eff Fritz Fuss GmbH & Co. Kommanditgesellschaft auf Aktien Latch lock
FR2776695A1 (en) * 1998-03-31 1999-10-01 Ferco Int Usine Ferrures Door or window lock with return pusher
GB2358666A (en) * 2000-01-31 2001-08-01 Micota Mortice latches with reversible bolt heads

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1975420A1 (en) * 2007-03-29 2008-10-01 Sotralu Device for screw assembly of at least one rigid part on a support and opening equipped with such a device
FR2914379A1 (en) * 2007-03-29 2008-10-03 Sotralu Soc Par Actions Simpli DEVICE FOR ASSEMBLING A SCREW OF AT LEAST ONE WORKPIECE ON A SUPPORT AND OPENING EQUIPPED WITH SUCH A DEVICE.
EP2711490A1 (en) * 2012-09-21 2014-03-26 Burg-Wächter Kg Device for moving a translatory movable body and lock with a bolt

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