EP1683934B1 - Lock, in particular lock for room door - Google Patents

Abstract

The lock has a latch (2) provided in a housing, where a pusher nut (3) strikes the latch such that the latch shifts against a resetting force of a latch spring (10), from a front closed position to a rear closed position, through the rotation of the nut against a resetting force of a pusher nut spring. The springs (10,17) are formed as integral components of the latch and the pusher nut by plastic injection molding.

Description

The invention relates to a lock according to the preamble of claim 1.

A lock of the kind in question is from the FR 2222875 previously known. This lock has a latch that can be retracted by an arm of a pusher nut. The pusher nut is made of plastic and has a molded arm, which forms the pusher nut. This arc-shaped spring leg is attached to a projection of the housing and forms with an extension of the same fall spring.

From the DE 10100763 a lock is known, are acted upon in the case and pusher each of a spring. The latch and the latch are made of plastic. The bolt forms an integrated guard locking. He can be reversed right-left.

A pusher with a stirrup-like shaped spring element shows the GB 1498 313 A ,

The US 4,353,582 A. describes a follower with rearwardly projecting spring bar, which bends when turning the follower.

The invention has the object of developing the generic castle manufacturing technology and use advantageous.

The claim 1 provides initially and essentially before, that the Drückemussfeder has at least two when bending the follower bent bending spring webs. These spring bars are fan-shaped arranged radially projecting from the hub of the follower. The spring bars can be straight or slightly curved. The spring bars can be at an acute angle to each other. Preferably, the spring bars are connected to each other with their radially outer ends. This compound may be of uniform material, so that of the at least two spring bars a loop is formed. But the webs can also rest only touching each other. For this purpose, in the direction of rotation of the nut, second spring webs, which are located at the rear to a first spring web, preferably form end-side bends, which are supported on the spring web lying in front of this spring web in the direction of rotation. In the relaxed state of these spring bars, the bends may have a distance from the adjacent spring bar. In the prestressed state, however, the ends of the bends are supported at the ends of the respective adjacent spring bar.

Preferably, the case or the follower is designed so that they can apply the respective required spring force of integrated spring elements themselves to get back to the starting position. These spring elements are molded of the same material on the case or the handle nut. The follower nut and the follower forming components may consist of two plastic components or of several assembled components. Furthermore, the forming components of the latch spring and the trap may consist of two plastic components or be assembled from different material components. The spring elements may have different shapes, for example, a leaf spring may have a wave or zig-zag shape. The latch spring may be arranged in a recess of the latch tail or it may also spring from the back of the latch tail. The end of the latch spring is supported in each case on a housing-fixed stop, on a wall of the housing directly or indirectly. It is also possible to assign the latch spring to the follower. As a result, the follower has resilient elements that act on the latch and the follower. The resilient elements on the follower also abut against a housing-fixed stop or on a wall of the housing. If the latch spring is associated with the follower, then supports These are located on a seated on the tail tail stop. In the case of the follower, the spring element is designed such that the leaf springs are arranged like a fan. In order to save material and to cushion the torque, the pusher nut is provided with spokes. The trap with its integrated latch spring is preferably injection molded from plastic. Likewise, the pusher nut with its integrated pusher spring can be produced by injection molding. As stated above, the latch spring can also be supported indirectly on a housing-fixed stop. For this purpose, it may be provided that the latch spring is supported on a pusher nut, which acts on the latch tail. The arm of the follower thus forms a quasi-housing stop, since the follower nut is stronger than the latch spring and thus the follower can not be rotated when pressing the case. The injection-molded plastic bar has a tumbler, which is an integral part of the injection molded part. In order to save on the bolt material, material recesses were provided here. On the latch spring mounting auxiliary projections are formed. These are used to attack a mounting tool, which biases the latch spring when mounting the case and the latch spring forming assembly. The case head oblique surfaces are formed. These serve for rattle-free fixation of the case head in the pre-set position in the case passage opening of the forend. From the latch tail protrudes toward the castle ceiling from a guide spring. The trap are integrally formed on the front face insertion bevels. Protrusions protrude from the trap spring. These are based on the castle ceiling. The inclined surfaces occur in the case trapped in the fall passage opening of the forend. They come into contact with a marginal edge of the window. Against the opposite edge of the window enters the case locking surface, so that the case head is held rattle-free in the window of the forend in a slight clamping position. In the pre-closed position, the trap is supported by stops on the back of the back. These attacks are assigned to the case header. Two stops can each be assigned to the inclined surfaces be. Alternatively or additionally, the stops can be assigned to the mutually parallel case head side walls. These stops then extend as rectangular bends to the locking surface of the case head.

Fig. 1 und 2

jeweils ein Schloss, das mit aufgebrochenem Schlossdeckel dargestellt ist, wobei bei jeder Figur die Ausgestaltung der Fallenfeder und/oder der Drückernussfeder variiert;

Fig. 3

eine Ansicht gemäß der Fig. 1 jedoch mit modifiziertem Riegel;

Fig. 4

eine perspektivische Ansicht der Drückernuss gemäß Fig. 3;

Fig. 5

eine perspektivische Ansicht der Falle gemäß Fig. 3 und

Fig. 6

eine perspektivische rückwärtige Ansicht der Falle gemäß Fig. 5.

Several embodiments of the invention are explained below with reference to the accompanying drawings. Show it:

Fig. 1 and 2

in each case a lock, which is shown with broken lock lid, wherein in each figure, the configuration of the latch spring and / or the follower nut varies;

Fig. 3

a view according to the Fig. 1 but with modified bar;

Fig. 4

a perspective view of the follower according to Fig. 3 ;

Fig. 5

a perspective view of the case according to Fig. 3 and

Fig. 6

a perspective rear view of the case according to Fig. 5 ,

Such a lock 1 is in particular a room door lock. The lock 1 consists essentially of a latch 2, a pusher 3 and a latch 4, which are arranged in a known manner in a housing 5, which consists of a bottom 5 'and a cover 5 "on a narrow side Figures of the left side of the lock 1 are arranged in a known manner, a cuff 6. Through this protrude the case 2 and the latch 4 therethrough.

In the first embodiment, which is in FIG. 1 is clarified, the trap 2 has a latch tail 7, in which a recess 8 is in the form of an elongated window. The trap 2 also has a trap head 9, on the rear side 9 'of which a trap spring 10 is rooted which extends into the recess 8. The latch spring 10 has a wave or zig-zag shape. The latch spring 10 is designed so that it has to the sides of the recess 8 game. The free end 10 'of the latch spring 10 is supported on a protruding into the window 8 housing-fixed stop 11. The window 8 is formed by a frame consisting essentially of two parallel extending webs, which are formed on the back 9 'of the case head 9 and converge slightly in the end region of the latch tail 7 and connected to each other at the end forming the bend 14 are.

Thus, the case 2 is not pushed out too far by the force of the latch spring 10 from the forend 6, 9 two inclined surfaces 12 are arranged on the top of the case head. These are integrally formed on the case head 9. The inclined surfaces 12 serve to minimize the case clearance in the preselected position of the case 2. The inclined surfaces 12 open in the direction of the latch tail 7 in each case in a step 37. The step 37 rises in the key extension direction towards the cover 5 " Stop for the trap 2, which abut on the back 6 'of the forend 6. The steps 37 ensure that the trap 2 is not pushed out of the lock housing 5 by the force of the trap spring 10.

The latch tail 7 is guided laterally by a housing-fixed guide pin 13 such that it can only move horizontally in the housing 5. At the end of the latch tail 7 is an angled portion 14, on which the pusher 3 can attack with an arm 15.

The pusher nut 3 is arranged in a drawn race in the housing 5 of the lock 1. The follower 3 forms the arm 15 which projects in the direction of the latch tail 7. The arm 15 is arranged on the follower 3, that the arm 15 is supported on the bend 14 of the latch tail 7, when the follower 3 is in the rest position.

The pusher nut 3 has arranged around its pivot spokes 16. These are provided for the purpose of saving material and to cushion the torque at the follower 3.

So that the pusher nut 3 is displaced back into its starting position after actuation, the pusher nut 3 forms a pusher nut 17. In the first embodiment, the follower key spring 17 is formed by fan-like the hub of the follower 17 radially projecting leaf springs 18.

The trained by the leaf springs 18 fan arms 19 have an angled end 20 on the end. The angled portions 20 of the fan arms 19 are aligned so that they abut respectively on an adjacent fan arm 19. The clockwise last fan arm 19 'has no angling, it forms with the penultimate fan arm 19 together the shape of a triangle. The last fan arm 19 'is supported on a housing-fixed stop 21. If the pusher nut 3 is rotated by a pusher inserted into its square recess 36, then the fan arms 19 essentially bend together, the bends 20 being supported on the fan arm 19 which is in each case in the direction of rotation. There are a total of four extending in the radial direction to the center of rotation of the follower 3 extending fan arms 19 are provided. The on the housing-fixed stop 21 supporting spring arm 19 'has end no bends.

The arranged in the direction of rotation of the follower 3 rearwardly to this fan arm 19 leaf spring arms 19 have end obtuse angled portions 20 which are directed in the direction of rotation of the follower 3 on each lying before Blattfederarm. With non-twisted follower 3, the ends of the angled portions 20 may have a slight distance from the front of each fan arm 19. If the follower nut 3 is rotated, the leaf spring arm 19 'which is supported on the housing-fixed stop 21 is first bent. In the course of a further rotational actuation of the follower nut 3, the other leaf spring arms 19 'are bent one after the other, after the angled portions 20 are supported on the respectively lying leaf spring arms 19. Along with this, there is a restoring force which increases in the initial phase of the pusher nut rotation.

The design of the bolt 4 substantially corresponds to the bolt, which in the above-mentioned document DE 101 00 763 A1 is described. Here, too, the latch 4 has an integrated tumbler 35. This is molded with the same material 4 with the latch 4. Notwithstanding the bar of this document, the latch 4 incorporated material recesses 22. However, the operation of the bolt 4 has not changed significantly to the aforementioned font. In the seventh embodiment of the latch 4 forms at its end face 4 'side insertion bevels 38. The chamfers 38 are integrally formed on the latch 4 for automatic assembly. By means of the insertion bevels 38, the bolt 4 can be more easily inserted in the bolt entry opening during automatic assembly.

Based on FIG. 2 a second embodiment will be explained in more detail. The trap has no plastic trap spring here, it is made of steel. The latch tail 7 has a web 46, which adjoins the rear of the case head 9 of the case 2. This extending in the direction of displacement of the case 2 web 46 has an attack edge for a leg 10 " formed as a bent leaf spring latch spring 10. The latch spring 10 is shaped similar to a hairpin spring. It is placed around a housing feature 47 and is supported with its second leg 10 'at the periphery of the follower 3 from.

From the pusher 3 protrude as well as in the embodiment of FIG. 1 Footbridges. A total of four webs 19 protrude substantially fan-shaped in the radial direction of the follower 3 from. A in the direction of rotation of the follower 3 upstream web 19 is supported with its free end directly on a housing-fixed stop 21, which is formed by an expression of the housing bottom. At the free end of this spring bar 19, the end of an angled portion 20 of a spring web 19 located behind in the direction of rotation is supported. Two further, each also angled portions 20 having spring bars 19 are based in the manner described on each in front of them in the direction of rotation of the follower 3 spring bar 19, so that all spring bars 19 bend when the follower 3 is rotated.

In the FIG. 2 are the the follower nut spring forming spring bars 19 bent, so shown biased. In the relaxed state, the spring bars 19 in the FIG. 1 illustrated form.

The latch 7 has a recess 8 extending in the direction of displacement of the latch, with which it is mounted on a stop 13 fixed to the housing. At this stop 13 of the arm 15 of the follower 3 is in non-actuated pusher.

Based on FIGS. 3 to 6 a third embodiment is shown in more detail. The third embodiment is very similar to the first embodiment shown in FIG FIG. 1 is shown. Notwithstanding this, the follower 3 in its square recess 36 forms two at right angles to each other standing, arranged on the square surfaces ramps 39 from. The ramps 39 are arranged approximately centrally to the extension direction of the square recess 36. The ramps 39 are used for play-free fixation of the pusher mandrel.

Furthermore, the embodiment of the case 2 differs from that in the first embodiment. Laterally on the case head 9 stop plates 40 are formed. The stop plates 40 have a structured surface on the end face 9 "of the case head 9. At the end face 9" of the case head 9, insertion bevels 41 are likewise arranged, as on the end face 4 'of the bolt 4. These also serve for the automated assembly of the lock 1 with its components.

The latch spring 10 has two mounting auxiliary projections 42, 43. The auxiliary assembly protrusions 42, 43 extend toward the key top 5 "in the key insertion direction, the auxiliary assembly protrusion 42 is located approximately midway in the longitudinal direction of the latch spring 10, and the auxiliary assembly protrusion 43 is associated with the free end of the latch spring 10. In the assembled state of the latch 2, the auxiliary installation protrusions are supported 42, 43 at the castle ceiling 5 "from. The Montagehilfsvorsprünge 42, 43 are used to assemble the case 2. This prevents bending of the latch spring 10 in the loaded state. An assembly tool, for example, a jaw tool engages the two auxiliary assembly projections 42, 43 and can tension the latch spring 10. As a result, an easy insertion of the case 2 in the lock housing 5 is possible.

At the end of the latch tail 7 at the bend 14, a guide spring 44 running in the direction of longitudinal extension forms at the end. The guide spring 44 serves to minimize play in the housing 5 and at the same time as rattle protection. It is supported on the lap ceiling 5 ".

The case head has two parallel facing away from each other, which have a substantially triangular shape. Between these triangular surfaces lies the blocking surface and the trap level of the trap. The side surfaces are each associated with stops 40, with which the case head is supported on the back side of the case when the trap assumes its pre-closed position. The stops 40 extend as rectangular bends from the locking surface of the trap.

The inclined surfaces 12, which rest against the inner wall of the case passage window of the forend 6 in the case of a closed case, continue rearward to stops 37. These stops 37 are in the vorgeschlossenen case on the forend 6 to prevent leakage of the case from the lock.

As in FIG. 6 is represented, the case head 9 forms recesses 45 on the underside. The recesses 45 serve to save material. Like also in FIG. 6 can be clearly seen, the case head 9 forms a larger rear trailing slope 46. The larger rear trap slope 46 serves to minimize the door air and ensures a safe enclosure of the trap second

The operations of the locks 1 of the different embodiments will be described below.

In all embodiments, the latch 4 behaves as in the aforementioned document. This interacts with a key bit, not shown. Due to the integrated tumbler 35 on the latch 4, it remains in its pre-closed position even after pre-closing. Also, the latch 4 is held by the tumbler 35 in its zurückgeschlossenen position. The lock 1 works in the usual way, so that you can close the door without pressing the handle nut 3. The case 2 slides with the slope of her case head 9 along a strike plate along. Along with it the trap 2 is moved back, which has a tensioning of the latch spring 10 result. When the door is closed, the case head 9 enters the trap entry opening of the strike plate. The movement is caused by the relaxing latch spring 10. To open the door, the latch 2 must be retracted by turning the handle nut 3.

When closing the door, the latch spring 10 is pressed against the stop 11 in the first embodiment without pressing the pusher nut 3. Due to the guide elements 13, a deflection of the latch tail 7 in the vertical direction is not possible. If the door has fallen into the lock, then the case 2 is displaced by the force of the latch spring 10 back to its original position. Thus, the case 2 can not protrude too far from the forend 6, two stages 37 are attached to the case head 9.

To open the door again, you have to press the handle nut 3 clockwise. The arm 15 of the follower nut 3 acts on the bend 14 of the latch tail 7, slides along it and pulls it housing inward against the force of the latch spring 10. At the same time the pusher key spring 17 is acted upon against the housing-fixed stop 21 and tensioned. If the user now lets go of the pawl, not shown here, whereby the pressing of the pusher nut 3 is then completed, the pusher nut 3 is displaced by the force of the poppet spring 17 and at the same time with the aid of the force of the latch spring 10 to its original position, as in FIG. 1 is shown.

Based on FIG. 2 the second embodiment will be explained with its operation. Here, when pressing the door, the latch spring 10 is not acted upon against a stop, but against the arm 15 of the Drückemuss 3. After pressing the door, the case 2 is moved back to its original position by means of the latch spring 10. To open the door, the pusher nut 3 must be applied clockwise. The arm 15 of the pusher nut 3 slides on the bend 14 of the case 2 and takes it with the housing inwards. At the same time the pusher key spring 17 is acted upon against the housing-fixed stop 21. After opening the door and releasing the pawl, not shown here, the pusher nut 3 is displaced by the force of the pusher spring 17 back to its original position. Also, the latch 2 is displaced by the force of the latch spring 10 to its original position.

The operation of the third embodiment corresponds to the first embodiment described above. Notwithstanding the first embodiment, the guide spring 44 is used to minimize play in the housing 5 and at the same time as rattle protection. This is supported on the cover 5 "The guide spring 44 minimizes the noise in the lock 1. The mounting auxiliary projections 42, 43 ensure easier insertion of the latch 2 into the lock housing 5. The assembly auxiliary projections can be engaged by an assembly tool Montagehilfsvorsprünge 42, 43 are based on the lock cover 5 "of the housing 5 and thereby prevent bending of the latch spring 10th

By the ramps 39 on the follower 3 ensures that the pusher mandrel of a pusher, not shown, is fixed exactly in the square recess 36.

The insertion bevels 38, 41 on the latch 4 and on the latch 2 facilitate automatic assembly. Through the insertion bevels 38, 41 find the case 2 and the latch 4 easier in the corresponding openings in the forend. 6

Due to the different embodiments of the follower 3 and the case 2 with the integrated springs a more cost-effective installation is possible because less Components in the lock 1 must be installed. The possibility of manufacturing both case 2, nut 3 and bolt 4 as plastic injection molded parts with integrated springs, reduces the number of parts of the lock device to a minimum. By the spokes 16 in the pusher 3 and the material recesses 22 in the latch 4 and in the case 2, the material costs are also reduced, because therefore less material is consumed on the parts. Through less assembly work and lower material costs during production is achieved that the lock 1 in the manufacturing cost is cheaper. By the above-described embodiment of the individual components a noise reduction in the lock 1 is achieved. Since the case 2 is made of a plastic compound, this forms a not so good sounding body as a trap that has been made of a steel mass. It was thereby achieved that the impact of the case 2 on the steel face-plate 6 results in a lower noise level. This measure reduces the impact noise in the lock 1 itself. By the guide spring 44, the Fallen tail game is intercepted, which arises upon impact of the case 2 on the strike plate. A quieter closing of the door is made possible. Also, the benefit of the product to the consumer is improved.

Claims (10)

1. Lock (1), in particular a room door lock, comprising a lock housing (5) which can be inserted into an insertion opening in the door and in which is disposed a latch (2), with which a thumb nut (3) engages in such a way that by rotating the thumb nut (3) against the restoring force of a thumb nut spring (17), the latch (2) can be displaced against the restoring force or a latch spring (10) from an advanced position into a retracted position, the thumb nut spring (17) being a spring pin, which is injection-moulded from plastics material, is subjected to flexural stress when the thumb nut is rotated, and is an integral component of the thumb nut (3), characterised in that the thumb nut spring (17) comprises a plurality of spring pins (18, 19) which are subjected to flexural stress when the thumb nut is rotated and are arranged in a fan shape protruding radially from the hub of the thumb nut (3).
2. Lock according to claim 1, characterised in that the spring pins (19) of the thumb nut spring (17) are formed as leaf springs (18).
3. Lock according to any one of the preceding claims, characterised in that the spring pins (19) comprise, at the ends thereof, bends (20) which are each supported against an adjacent spring pin (19) when the thumb nut (3) is rotated.
4. Lock according to any one of the preceding claims, characterised in that the component forming the thumb nut spring (17) and the thumb nut (3) consists of two plastics material components.
5. Lock according to any one of the preceding claims, characterised in that the component forming the thumb nut spring (17) and the thumb nut (3) consists of a plurality of assembled components.
6. Lock according to any one of the preceding claims, characterised in that the pins (18) of the thumb nut spring (17) form side portions of a closed loop (23, 26, 30).
7. Lock according to claim 6, characterised in that the loop (23, 26, 30) forms elongate side portions and is supported by a side portion against the lock housing in such a way that when the thumb nut (3) rotates or the latch is retracted, both side portions of the loop are bent.
8. Lock according to any one of the preceding claims, characterised in that the latch tip (7) of the latch (2) comprises a recess (8) in which there is a latch spring (10), the latch spring (10) being rooted to the back (9') of the latch head (9) and being supported against a stop (11) which is fixed to the housing and projects into the recess (8), or being supported by an indentation (27) in an end formed by a loop (26) against a stop (28) which is fixed to the housing.
9. Lock according to any one of the preceding claims, characterised in that the latch spring (10), formed by a leaf spring arm (34), of the thumb nut (3) is formed in one piece and lies against a stop (33) of the latch tip (7) and is disengaged or entrained in rotation when the thumb nut is rotated.
10. Lock according to any one of the preceding claims, characterised in that the lock (1) has a bolt (4), which is injection-moulded from plastics material and the tumbler (35) of which is an integral component of the injection-moulded component.

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