US3797285A - Round furniture recess lock - Google Patents

Round furniture recess lock Download PDF

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Publication number
US3797285A
US3797285A US00325964A US3797285DA US3797285A US 3797285 A US3797285 A US 3797285A US 00325964 A US00325964 A US 00325964A US 3797285D A US3797285D A US 3797285DA US 3797285 A US3797285 A US 3797285A
Authority
US
United States
Prior art keywords
housing
bolt
lock
opening
latch
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.)
Expired - Lifetime
Application number
US00325964A
Other languages
English (en)
Inventor
Ewald Jung
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.)
D La Porte Soehne GmbH
Original Assignee
D La Porte Soehne GmbH
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 D La Porte Soehne GmbH filed Critical D La Porte Soehne GmbH
Application granted granted Critical
Publication of US3797285A publication Critical patent/US3797285A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B65/00—Locks or fastenings for special use
    • E05B65/44—Locks or fastenings for special use for furniture
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B65/00—Locks or fastenings for special use
    • E05B65/46—Locks or fastenings for special use for drawers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/50—Special application
    • Y10T70/5093—For closures
    • Y10T70/5097—Cabinet
    • Y10T70/5111—Projectable bolt
    • Y10T70/5119—Multidirectional displacement
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/50—Special application
    • Y10T70/5093—For closures
    • Y10T70/5155—Door
    • Y10T70/5199—Swinging door
    • Y10T70/5246—Dead bolts
    • Y10T70/5296—Single
    • Y10T70/5301—Sliding and swinging
    • Y10T70/531—Key operable only

Definitions

  • ABSTRACT A lock for recessing into an article of furniture which is responsive to a key consisting of a housing having a latch opening formed on its back side, a lid having an opening to receive the key for closing the housing, a latching bolt slidably disposed in said housing having an extending front latch portion offset from the plane of the bolt in the direction of the back of the housing for movement through the opening of said housing, a spring-loaded lock tumbler disposed in said housing and engaging said latching bolt for defining the lock and unlock positions of said bolt, so that when the key is inserted in the housing and rotated, it engages the latch bolt to movethe offset front portion out of the housing latch opening in order to lock the furniture article.
  • This invention relates to a round, recessed lock for furniture, consisting of a lock housing provided with a lid, a spring loaded tumbler and a latch bolt. In its initial position, the bolt sinks into the bottom of the lock. During the latching portion, the bolt is guided out of the bottom opening of the lock housing in response to the turning of the key.
  • Furniture locks are generally inserted, in the sides of furniture doors, flaps, drawers and the like, and only to a very limited degree because of the relatively great expenditure of labor.
  • box locks are surface mounted on the rear side of the cupboard door which, although substantially simpler to assemble, are, however, unsightly due to their projecting lock boxes and obstructive appearance.
  • These surface mounted box locks however, can not be used as flap closures of writing bureaus, for example, since the inner sides of the flaps, in their folded down state, serve as a writing surface, and should, accordingly, be shaped to be planar.
  • round recess locks have been developed, having a bottom which is flush with the rear flap side in a parallel plane.
  • a conventional round lock is provided with a round insertion opening, in which a pin enters during the transition into the locked position of the flap so as to displace a groove extending transversely to its access.
  • the latch bolt can then pivot to engage the lock.
  • the conventional furniture lock constructed as a cylinder lock, can still be operated by a conventional furniture key, which does not have to be pressed into the lock to start the latching process.
  • the lock includes a helically ascending glide surface provided within the cylinder. This construction, however, requires very long lock length so that the housing part projecting on the visual side of the furniture plate is enormously great. A more significant disadvantage in these locks is their relatively laborious and costly production.
  • the key can also, in the case of this furniture recess lock, be withdrawn only in the latched position of the latching bolt, so that there are particular difficulties in storing and packing the furniture locks, the task of the present invention is to create a round furniture recess lock of extremely low assembled height, inexpensive in cost, operable with a customary furniture key, and having a bolt which is linearly movable over the periphery of the lock housing, so that the key can be withdrawn in a latched as well as in an unlatched position.
  • the bolt is constructed like a rocker, having a bend extending transverse to its direction of motion guided on the lock bottom, and linearly movable over the periphery of the housing box.
  • the latching portion guidable out of the lock housing, is offset relative to the inner bolt portion by the thickness of the bottom wall.
  • the latching portion in the zigzag shaped transition region has lateral material projections which engage in the recesses of true contours of the lock bottom.
  • the novel lock can be constructed to be disc-shaped and have a maximum height of merely 10 mm, so that it can be inserted even in the thinnest woods, which are used for door or flap levers.
  • the lock bottom also extends in a plane parallel to the inner side of the door leaf.
  • the bolt is guided on a linear path of movement by webs bordering it laterally, and arranged perpendicular on the lock bottom.
  • the webs possess elongated recesses open at an edge, in which is guided the plate-shaped tumbler lying on the latch bolt and displacable transversely thereto.
  • the rectilinear motion of the latching bolt is further supported by the cam-shaped material projections, which glide along on the outer side of the lock bottom at the edge region of the recesses.
  • the latch portion guid able out of the lock housing by the cam-shaped projections provided at its base, has a T-shape which corresponds to the bottom'opening.
  • the tumbler within the inner bolt portion is a curve-shaped recess in which the key bit engages, wherein the edge portion (end region) of the recess directly acted upon by the key bit, possesses a wall thickness about double that of the remaining region of the bolt.
  • the tumbler at the end region remote from the arm, possesses a bent-over lug directed to the bolt.
  • FIG. 1 shows a round recess lock according to the invention in exploded representation by the partial FIGS. 1a to 1d;
  • FIG. 2 is an enlarged scale view of the fully assems bled lock according to FIG. 1 with the omission of the housing lid;
  • FIGS. 4 and 5 show the lock according to FIGS. 2 and 3 after a key rotation of 90;
  • FIGS. 6 and 7 show the lock according to FIGS. 2 and 3, or 4 and 5 respectively after a key rotation of 180;
  • FIG. 8 is a perspective view of the lock according to FIGS. 1 to 7 with a view of the outer lock bottom with the latching bolt displaced in the latched position;
  • FIG. 9 shows the lock inserted in the swivel flap of a piece of furniture viewed in the direction of the latching bolt
  • FIG. 10 is a view of the inserted lock seen in the direction of the key opening
  • FIG. 11 shows a modified embodiment of a furniture lock according to the invention in exploded representation with partial FIGS. 11a to 11d, and;
  • FIG. 12 shows in an enlarged scale, the fully assembled lock according to FIG. 11 with the omission of the housing lid.
  • FIG. la shows a lock box 1, having a back or bottom 1 l with an opening 12, two perpendicularly oriented webs 13 as well as a guide pin 14.
  • a boss 15 having a threaded bore is provided for securing a housing lid 4 (FIG. 1a), when the lid is not to be locked by means of a clip closure.
  • Webs 13 display elongated recesses 16 open at an edge.
  • FIG. 1b shows a latching bolt 2, which is disposed in 1 housing bottom 11.
  • Bolt portion 22 is bent, as may be seen from FIGS. 3, 5 and 7, so that latchbolt 2 is constructed as a rocker.
  • Portion 21 of bolt 2 is offset relative to portion 22 by the wall thickness of lock bottom 11, so that the outer side of latch portion 21 is flush with the outer bottom side of lock housing 1 in the open position of the lock.
  • the transition region 23 from bolt portion 21 to bolt portion 22 rises steeply, to form a zig-zag shaped transition.
  • cam-shaped projections 24 Shaped laterally on to this transition are cam-shaped projections 24, the dimensions of which correspond to the lateral enlargements 12' of the recess of bottom opening 12.
  • Projections 24 possess front and rear inclined ramps, which are adapted to the chamfers of the edges of openings 12, these slopes serving as glide surfaces, which aid the exit or entry ofbolt 2 from'or into the bearing seating of lock bottom 11.
  • a spacing A which is somewhat greater than the wall thickness of housing bottom 11, so as to serve as a guide groove between projections 24 and bolt portion 22.
  • Tumbler 3 in FIG. 1c is a flat, plate-shaped disc, which, in the assembled lock, comes to rest on the latching bolt. Lateral projections 31 and 32 are guided in recesses 16 ofwebs 13 (FIG. 1a). A slightly bent arm 33 of the tumbler receives a compression spring 34, which is supported against a projection 17 provided in the lock housing. Projection 31 of tumbler 3 is formed to be fork-shaped, so that it will not abut against boss 15. In the range of projection 32, the tumbler includes an approximately U-shaped guide groove 35 in which routing pin 27 of the latch bolt glides. Tumbler 3 has a curve-shaped aperture 36 for engaging the key bit. During the locking movement of the key, the key bit engages at edge 37 of the hole and pushes tumbler 3 to one side against the force of compression spring 34, so
  • the tumbler includes a nose 38, directed downwardly to the bolt, which releases or locks the bolt.
  • FIG. 1d shows a disc-shaped housing lid 4 with a keyhole opening 41, and a lateral recess 42 for receiving abutment 17 to fix the lid into position.
  • housing lid 4 is fastened to lock housing 1 by a counter sunk screw 43. It is equally possible to secure the lid by undercut projections.
  • FIGS. 2 and 3 show the fully assembled lock in the unlocked state with housing lid 4 removed, and with a key 5 shown in cross-section and inserted over guide pin 14.
  • the parts lying over one another in the lock housing are clearly distinguished by horizontal hatching.
  • the inner portion 22, remote from the latching portion 21 of the latching bolt, rests on the housing bottom in a planar parallel manner. If key 5 is then rotated in the direction of the arrow, then the key bit engages the upper region of wall 26 of the aperture, since this wall, in this position of the latching bolt, is designed to be slightly slanted.
  • an adequate tilting motion is exerted upon the bolt, which effects an emerging or clipping of bolt head 21 out of, or in to the lock bottom 1 1, respectively.
  • FIGS. 4 and 5 show the position assumed by the lock elements after a rotational movement of the key. After the'key is rotated the lock is latched as shown in FIGS. 6 and 7. In FIG.
  • bolt 2 is now tilted about its bend, so that the inner portion of the bolt, opposite to latching portion 21, points in the direction of the housing lid and pin 27 has notched into the base of the other U-arm of the guide groove 35.
  • the reverse process takes place, where the key bit engages the upper edge of inclinded wall 26 of the hole, so that the bolt is tipped about the location of its bend.
  • the lock of the invention is easily inserted in pieces of furniture, as indicated in FIGS. 9 and 10. Only one stepped drill is required to form the recess bore for receiving the lock.
  • the penetrating keyhole bore can also be provided in one operating step.
  • the lock can then be pressed into the bore. It is not necessary to retain the lock by means of screws or the like since as shown in FIG. 5, the outer housing envelope is provided with circumferentially and co-axially extending riflings, grooves, flutes, beads or the like.
  • the outer housing envelope is provided with circumferentially and co-axially extending riflings, grooves, flutes, beads or the like.
  • the lock shown in FIGS. 1 to 8 is intended for application with flaps in writing bureaus or the like, or for use where a vertically, latch bolt motion is demanded with a vertically orientated keyhole.
  • the lock of the invention can also be applied as a cupboard door lock,
  • FIGS. 11, 11a to 11d and 12 An example of this embodiment is shown in FIGS. 11, 11a to 11d and 12.
  • the bolt is transversely orientated with respectto the keyhole, so that the guide pin for the key is displaced relative to the prior example.
  • the reference numerals of the embodiment of FIGS. 11 and 12 have been chosen in accordance with FIGS. 1 to and been made different merely by a 0" appended in each numeral.
  • a lock for recessing into an article of furniture and responsive to a key comprising:
  • a housing having a latch opening formed in a portion of its back side
  • a lid for closing the front opening of the housing, said lid including a key receiving opening;
  • a latching bolt slidably disposed in said housing having an extending latch portion offset from the plane of said bolt in the direction of the back of the housing for movement through the latch opening of said housing;
  • a spring loaded lock tumbler disposed in said housing and engaging said latching bolt for defining the locked and unlocked positions of said bolt, so that when the key is inserted in the housing and rotated,
  • the key engages the latching bolt to move the offset latch portion upward and rearward out of the housing latching opening to lock the furniture article.
  • the extending latch portion additionally comprises lateral projections disposed on each side thereof for engaging the edges of said housing latch opening to guide said ex- 6 tending portion out of said opening.
  • said bolt additionally comprises a curve-shaped recess formed within the body of said bolt for engaging the key, said recess including an edge portion having an enlarged thickness with respect to that of the bolt for engaging the key bit.
  • said latching bolt comprises a routing pin secured perpendicular with respect to the plane of said bolt
  • said tumbler comprises a guide slot for engaging said routing pin, said slot including two recessed areas at opposite ends for defining the locked and unlocked positions of said bolt.

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  • Lock And Its Accessories (AREA)
US00325964A 1972-02-02 1973-01-23 Round furniture recess lock Expired - Lifetime US3797285A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2204847A DE2204847C3 (de) 1972-02-02 1972-02-02 ZylinderförmigesMöbeleinlaßschloB

Publications (1)

Publication Number Publication Date
US3797285A true US3797285A (en) 1974-03-19

Family

ID=5834794

Family Applications (1)

Application Number Title Priority Date Filing Date
US00325964A Expired - Lifetime US3797285A (en) 1972-02-02 1973-01-23 Round furniture recess lock

Country Status (8)

Country Link
US (1) US3797285A (fr)
AT (1) AT316345B (fr)
BE (1) BE791939A (fr)
DE (1) DE2204847C3 (fr)
FR (1) FR2171711A5 (fr)
GB (1) GB1360323A (fr)
IT (1) IT976900B (fr)
NL (1) NL7215971A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD781627S1 (en) * 2015-09-11 2017-03-21 Blue Snow Montana, Inc. Ring for furniture embedded cavity

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2734043C2 (de) * 1977-07-28 1983-08-25 Martin Lehmann Kg, 4950 Minden Möbeleinlaßschloß

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1351838A (en) * 1916-05-08 1920-09-07 Benjamin J Cohon Lock
US1393006A (en) * 1920-07-13 1921-10-11 Block Alexander Lock

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1351838A (en) * 1916-05-08 1920-09-07 Benjamin J Cohon Lock
US1393006A (en) * 1920-07-13 1921-10-11 Block Alexander Lock

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD781627S1 (en) * 2015-09-11 2017-03-21 Blue Snow Montana, Inc. Ring for furniture embedded cavity

Also Published As

Publication number Publication date
DE2204847B2 (de) 1974-07-18
GB1360323A (en) 1974-07-17
FR2171711A5 (fr) 1973-09-21
BE791939A (fr) 1973-03-16
AT316345B (de) 1974-07-10
DE2204847C3 (de) 1975-03-20
DE2204847A1 (de) 1973-08-16
IT976900B (it) 1974-09-10
NL7215971A (fr) 1973-08-06

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