Lock with reversible latch

Abstract

The invention relates to a lock with a left-right reversible latch (2) arranged in a lock housing (1), which is horizontally displaceable. The latch tail (3) of the latch has a stop element (5) against which, in an operating position, an arm (7) of a cam follower (6) engages. When the lock housing (1) is turned upside down, gravity moves the stop element (5) from the operating position to a release position, in which a latch head (4) of the latch (2) can be rotated by 180°. For an improvement that is advantageous in use, it is proposed that the stop element (5) be a slide that is vertically displaceable on the latch tail (3), wherein, in an operating position, the latch head (4) is fixedly located in a window (8) of a faceplate (9) and, in the release position, is displaced out of the window (8) in the direction away from the lock housing (1).

Description

field of technology

[0001] The invention relates to a lock with a left-right reversible latch arranged in a lock housing, which can be moved in a horizontal direction and whose latch tail has a stop body on which, in an operating position, an arm of a push-button nut engages and which, when the lock housing is brought into an upside-down position, is moved by gravity from the operating position to a release position in which a latch head of the latch can be rotated by 180°. State of the art

[0002] DE 914 469 B describes a lock with a latch whose latch tail has a stop element that can be pivoted from an engaged position to a release position. In the engaged position, the stop element lies within the path of movement of a lever arm, so that the latch can be retracted by operating the lever. When the latch is pushed into the lock housing by pressing its latch head, the stop element detaches from the lever arm and can be pivoted into a release position by turning the lock housing upside down. In this position, the stop element is no longer within the path of movement of the lever arm. The entire latch can be pulled out of the lock housing and, rotated 180°, reinserted into the lock housing.

[0003] From US 8,261,584 B2, a lock is known in which the latch can be reversed by pushing it into the lock case when the lock case has been brought into an upside-down position.

[0004] DE 931 876 B describes a lock in which the latch can be rotated by 180° when a slide that can be moved in the lock housing is moved from an operating position, in which the slide forms a stop for an arm of the handle nut, to a release position.

[0005] EP 1 482 110 B1 discloses a slide that can be moved vertically within the lock housing and forms a stop against which a counter-stop of the latch tail engages in an operating position. The slide can be moved into a release position in which the latch head can be brought into a leading position relative to a faceplate, in which the latch head can be rotated by 180°.

[0006] BE 433 058 A discloses a door lock with a latch and a spindle. One arm of the spindle rests against a vertically movable slide, which is connected to a rod coupled to the latch. The slide can be moved into a release position by rotating the lock, in which the latch head can be rotated.

[0007] US Patent 137,272 A discloses a door lock with a reversible latch head. The door lock has a spindle with a recess for a crossbar that is movable relative to the spindle. When the case is rotated, the crossbar can be moved vertically, releasing the latch head so that it can be rotated 180°. Summary of the invention

[0008] The invention is based on the objective of providing a lock with a reversible latch that is improved in terms of usability compared to the prior art.

[0009] The problem is solved by the invention specified in the claims, wherein the dependent claims are not only advantageous further developments of the invention specified in the main claim, but also represent independent solutions to the problem.

[0010] The lock in question is intended for use in a door, with the direction of the latch displacement being a horizontal direction when used as intended.

[0011] First and essentially, it is proposed that, as in the prior art, the strike plate can be moved from an engaged position to a released position by inverting the lock housing before its installation in a mortise opening of a door. According to the invention, the strike plate is a slide that can be moved vertically along the latch tail. In the engaged position, a stop surface of the strike plate lies in the path of movement of a lever arm, so that the latch can be retracted by operating the lever. When the lever is not operated, the lever arm rests against a stop attached to the lock housing, thus preventing it from rotating. When the lever is operated, the lever arm moves away from this stop and acts upon the strike plate, which is fixed to the latch tail, so that the latch can be moved from a locked position to a retracted position.In the locked position, a section of the latch head is located in a window in the faceplate that matches the outline of the latch head, preventing it from rotating. Even in the retracted position, at least part of the latch head remains in this window, preventing rotation. When the strike plate is moved from its engaged position to a release position, the latch can be moved further out of the lock housing from the locked position into a projecting position. In the projecting position, the latch head is positioned far enough out of the faceplate window to allow it to rotate 180° around a horizontal axis.The release position is achieved in particular by rotating the lock from a position where, during normal use, a narrow side points upwards, so that gravity moves the strike plate into the release position. The latch head has a bearing extension by which the latch head is mounted to the latch tail.

[0012] The strike plate has a shaft-like recess into which a projection of the latch tail engages with a vertical clearance. This vertical clearance is sufficiently large that a first strike surface of the strike plate, which in the engaged position lies within the path of movement of a spindle arm, is displaced from this path. The strike plate is preferably held in the engaged position by gravity. A relative displacement of the strike plate from the engaged position to a release position is achieved by rotating the lock housing 180° around a vertical axis, allowing the strike plate to shift relative to the latch tail such that the spindle arm is no longer within the path of movement of the first strike surface. This displacement from the engaged position to the release position occurs under the influence of gravity.The strike plate can have a second stop surface which, in the release position, lies in the path of movement of the spindle arm. The latch can be actuated by a latch spring, which, in the release position, pulls the latch out of the lock housing until the spindle arm strikes the second stop. The latch is thus moved into a limited-movement position, allowing the latch head to rotate. The strike plate's channel, which receives the projection of the latch tail, has an elongated cross-section. The projection engaging in the channel can be cuboid in shape, preventing the strike plate from rotating against the latch tail. A narrow wall of the channel forms a stop flank against which the projection rests in its release position.Opposite this narrow wall is another narrow wall, forming a stop flank against which the projection rests in its operating position. The projection is formed by an angled section of a trap tail designed as a flat piece. The trap tail can be an injection-molded plastic or metal part. The stop body can also be made of metal or plastic and be injection-molded.

[0013] Another aspect of the invention relates to the mounting of the trap head on the trap tail. The trap tail can form a bearing recess that supports a section of a bearing extension of the trap head. The bearing extension can have a reduced-diameter section that is supported in two opposing bearing recesses. The bearing recesses can each be formed by a fork tine of a bearing fork. A gap extends between the fork tines through which the bearing extension can pass when the trap head is mounted on the trap tail. For this purpose, the bearing extension, and in particular the reduced-diameter section, has opposing flattened sections whose distance corresponds to the width of the gap. This allows for a bayonet-like connection of the trap head to the trap tail.A free end of the bearing extension can form a bearing journal that can engage in a bearing opening of a bearing block. The bearing block, like the fork tines, can be formed by angled sections. Brief description of the drawings

[0014] An embodiment of the invention is explained below with reference to the accompanying drawings. These show: Fig. 1 a top view of a lock housing of a lock according to the invention with the lock cover removed and a latch in a forward-closed position, Fig. 2 a representation according to Figure 1 , however with a closed trap, Fig. 3, which is in the Figure 1 The lock shown, however, is in an upside-down position, which it has been brought into by rotating the lock housing 1 about a vertical axis by 180°, whereby a slight inward displacement of the latch 2 causes a stop element 7 to move out of the position in the Figure 1 and 2Fig. 4 shows a perspective view of the lock in the overhead position, where, however, the latch head 4 is moved from the locked position to a protruding position out of the lock housing 1, Fig. 5 shows the lock in the overhead position with the latch head 4 partially rotated about an axis A, Fig. 6 shows the view according to arrow VI in Figure 5 Fig. 7 a perspective view of the lock, which has been rotated from the overhead position back into the operating position, showing a window 31 in the upper narrow wall of the lock housing 1 through which the stop 5 can pass into its release position, Fig. 8 perspective view of the stop 5, Fig. 9 the view according to arrow IX in Figure 8 , Fig. 10 the view according to arrow X in Figure 8 , Fig. 11 perspective view of trap tail 3, Fig. 12 view according to arrow XII in Figure 11, Fig. 13 the view according to arrow XIII in Figure 11 , Fig. 14 perspective view of the trap head, Fig. 15 view according to arrow XV in Figure 14 , Fig. 16 the view according to arrow XVI in Figure 14 , Fig. 17 the trap 2 with trap head 4 attached to the trap tail 3 and Fig. 18 perspective view of trap 2. Description of the embodiments

[0015] The figures show a simple interior door lock, which only has a latch 2 with a latch head 4 guided in a window 8 of a faceplate 9. Embodiments not shown also have bolts that can be extended through another window of the faceplate 9 or other features.

[0016] A lock housing 1, which is attached to the rear of the faceplate 9, can be inserted into a recess on the narrow side of an interior door leaf. The latch head 4, which has a beveled angle, can be reversed from a left-hand to a right-hand position. This is done by turning the lock housing from its left-hand to its right-hand position before inserting it into the recess of the interior door leaf. Figure 1 and 2 The depicted operating position is rotated 180° around a vertical axis. The lock housing 1 then assumes the position shown in the Figures 3-6 The depicted overhead position.

[0017] In the operating position, an arm 7 of the push-button nut 6 rests against a housing-fixed stop formed by a guide pin 22. A stop body 5, which is attached to the rear end of the latch tail 3, forms a stop with a stop surface 10 that rests against the arm 7. In this position, the latch head 4 assumes a forward-closed position in which the latch head 4 is almost completely protruding from a window 8 of the faceplate 9. Only a rear section of the latch head 4 is supported in the window 8, so that the latch head 4 cannot rotate.

[0018] In the overhead position, the stop body 5 can be moved by gravity from its operating position to a release position in which the stop surface 10 no longer rests against the arm 7, so that the latch head 4 can fully extend out of the window 8 and be rotated 180°. To move the stop body 5, it may be necessary to apply slight pressure to the latch head 4, i.e., to move it slightly into the lock housing 1, as described in the Figure 3 shows that the stop surface 10 moves away from the arm 7, so that there is no frictional connection between arm 7 and stop surface 10.

[0019] After the trap 4 has been reversed, the stop 5 can be returned to its operating position. For this, it is also necessary to move the trap head 4 slightly into the housing 1 so that the stop surface 10 can move behind the arm 7.

[0020] Within the lock housing, a flat latch tail 3 of the latch 2, made of plastic or metal, is slidably mounted transversely to the direction of extension of the faceplate 9. A guide pin 22 is provided to guide the latch tail 3. This guide pin is fixedly connected to the lock housing 1 and engages in an elongated hole 21 of the latch tail 3. The guide pin 22 also forms a stop against which the arm 7 of the spindle 6 can rest.

[0021] The latch tail 3 supports the latch head 4, which forms a sloping flank and a locking flank. Behind the locking flank and the sloping flank, which project from the window 8 of the strike plate 9 in the forward-closed position, a substantially circular cylindrical bearing extension 23 extends along the rear side of the latch head 4. This bearing extension has a reduced-diameter section 25 that is supported in bearing recesses 17. A bearing pin 24 is provided at the end of the bearing extension 23 and is supported in a bearing opening 20.

[0022] Two opposing flattened sections 26 are provided, extending into the reduced-diameter section 25. The flattened sections also extend into the area of ​​the otherwise cylindrical bearing extension 23 adjacent to the reduced-diameter section 25.

[0023] The trap tail 3 has two fork tines 16, which are formed as angled sections and have two opposing bearing projections 17 that engage in the reduced-diameter section 25. A gap 18 extends between the fork tines 16, the width of which corresponds to the distance between the flats 26, so that the trap head 4 can be inserted into the gap 18 to be bayonet-like mounted on the trap tail 3, with the bearing pin 24 entering the bearing opening 20 formed by a bearing block 19 of the trap tail 3. The bearing block 19 can also be angled.

[0024] The Figures 8-10Figure 1 shows an embodiment of a stop body 5 of a lock according to the invention. The stop body 5 has a substantially cuboid shape and can be made of plastic or metal. One broad side of the stop body 5 forms a rectangular recess, which forms a shaft 12 into which a projection 15 of the latch tail 3, opposite the two fork prongs 16, can dip in order to mount the stop body 5 slidably on the latch tail 3 in a vertical direction.

[0025] The shaft 12 has an elongated shape. The length of the shaft 12 is greater than the vertical extension of the projection 15, which has a rectangular cross-section. The stop body 5 can thus shift in a direction parallel to the extension direction of the sleeve 9 relative to the latch tail 3. In both end positions of displacement, one narrow side of the projection 15 rests against a narrow side of the shaft 12. The width of the shaft 12 is slightly greater than the width of the projection 15, so that the projection 15 engages in the shaft 12 with some play.

[0026] The stop body 5 has a first stop surface 10, which has a first distance to the projection 15 or to the shaft 12. The stop surface 10 extends essentially parallel to the shaft 12.

[0027] The strike plate 5 has a second strike surface 11, which has a second distance to the projection 15 or to the shaft 12 that is smaller than the first distance. The two distances differ essentially by the amount by which the latch head 4 lies in the window 8 in the forward-closed position. In the forward-closed position, the arm 7 of the handle nut 6 rests against the first strike surface. In the extended position of the latch head 4, the arm 7 of the handle nut 6 rests against the second strike surface, so that the latch head 4 is completely protruded from the window 8.

[0028] The second stop surface 11 is formed by a recess 14 which has a side wall.

[0029] In the Figure 1 and 2In the illustrated operating position, the projection 15 rests against a narrow side of the shaft 12 that points upwards in the operating position, so that the stop surface 10 lies in the path of movement of the arm 7. The stop body 5 is held in this position by gravity.

[0030] When a nut body 27 of the trigger nut 6 is rotated, for example by means of a trigger whose square spindle is inserted into a square opening of the nut body 27, the arm 7 moves the stop body 5 and with it the attached latch tail 3 and the attached latch head 4 into a closed position of the latch 4. This tensions both a trigger spring 29, which acts on an arm 30 of the trigger nut 6, and a latch spring 28, which is supported on the bearing block 19. When the trigger is released, the trigger spring 29 moves the trigger nut 6 back into its initial position, and the latch 2 is moved back into its initial position by the latch spring 28.

[0031] To change the position of the trap 4, the lock housing 1 is turned into the upside-down position shown in figures 3 to 6, in which gravity then acts in the opposite direction on the stop body 5, so that it can shift relative to the projection 15, so that the projection 15 can then rest against the opposite narrow wall of the shaft 12.

[0032] The Figure 3 This shows that for this displacement caused by gravity, it may be necessary to move the latch head 4 slightly into the housing 1, so that the stop surface 10 detaches from the counter-stop surface of the arm 7. The stop body 5 passes through a window 31 in a narrow wall of the lock housing 1.

[0033] The latch spring 28 then moves the latch 2 out of the lock housing 1 in one direction until the arm 7 abuts the second stop surface 11, which is set back from the first stop surface 10, and the latch head 4 has fully emerged from the faceplate 9, so that, as the Figures 5 and 6 show, can be rotated.

[0034] After the latch head 4 has been reversed, the latch 2 can be moved back by pressing on the latch head 4 until the stop 5 has moved sufficiently away from the arm 7. Then, either a manual force can be applied to the stop 5 to move it back through the window 31, or, after the lock housing has been reversed into its operating position, the stop 5 will move back to its initial position under the influence of gravity, in which the first stop surface 10 lies in the path of movement of the arm 7. List of reference symbols

[0035] 1 Lock housing 26 flattening 2 trap 27 Nut body 3 Trap tail 28 Trap spring 4 Traphead 29 Push button spring 5 Stop body 30 arm 6 Push nut 31 Window 7 arm 8 Window A axis 9 cuff 10 Stop surface 11 Stop surface 12 Shaft 13 in-depth 14 Exclusion 15 projection 16 fork tines 17 Warehouse bulge 18 space 19 bearing blocks 20 Warehouse opening 21 Slotted hole 22 guide pin 23 Storage extension 24 bearing journal 25 reduced diameter section

Claims

1. Lock comprising a left-right reversible latch (2) arranged in a lock case (1) and displaceable in a horizontal direction, the latch tail (3) of which has a stop body (5) on which an arm (7) of a hub (6) acts in an operative position and which, when the lock case (1) is brought into an overhead position, is displaced by gravity from the operative position into a release position in which a latch head (4) of the latch (2) can be rotated by 180°, wherein the stop body (5) is a slider displaceable in a vertical direction on the latch tail (3), wherein the stop body (5) has a shaft-like recess (12) into which a projection (15) of the latch tail (3) engages with vertical clearance, characterized in that the latch tail (3) is formed by a flat body which forms the projection (15) by means of a first bend.

2. Lock according to claim 1, characterized in that the latch head (4) is rotatably mounted on the latch tail (3) about a horizontal axis and, in the operative position, is non-rotatable in an opening (8) of a faceplate (9), and in the release position is displaceable out of the opening (8) in a direction away from the lock case (1).

3. Lock according to any one of the preceding claims, characterized in that the arm (7) in the operative position rests on a first stop surface (10) of the stop body (5) and in the release position rests on a second stop surface (11), which is arranged offset in the horizontal direction relative to the first stop surface (10).

4. Lock according to any one of the preceding claims, characterized in that the latch tail (3) forms a bearing fork having two fork tines (16) spaced by a clearance (18), and bearing recesses (17) which rotatably support a section (25) of a bearing extension (23) of the latch head (4), the fork tines (16) being formed in particular by a second bend of the latch tail (3).

5. Lock according to claim 4, characterized in that the bearing extension (23) having a diameter-reduced section (25) is mounted in the bearing recesses (17), said section having flats (26) whose spacing corresponds to the spacing of the fork tines (16).

6. Lock according to claim 4 or 5, characterized in that an axle pin (24) is arranged at the end of the bearing extension (23), said pin being mounted in a bearing opening (20) of a bearing bracket (19).

7. Lock according to any one of the preceding claims, characterized in that the latch tail (3) is an injection-molded part made of plastic or metal.

8. Lock according to any one of the preceding claims, characterized in that the stop body (5) is an essentially cuboid plastic body or metal body.

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