EP0576787A1 - Door lock including a gear train - Google Patents

Abstract

In a door lock with a bolt and preferably also a latch and with multi-point locking via push rods (22, 23) and locking elements attached thereto, which, in the same way as the bolt (2), can be brought into the locking position and out of this by means of a key, the rotation of the key of the lock cylinder must in a suitable way both be transmitted and be converted into a sliding movement of the bolt (2) and of the locking elements. At the same time, the drive for the locking elements moves transversely relative to the bolt (2) and to the latch (3). The conversion of the key rotation takes place via a pinion (8), driven by the locking bit (6) of the lock cylinder (5), by way of two intermediate wheels (9 and 10) to a gear which, according to the invention, is designed as a planetary gear (11). <IMAGE>

Description

The invention relates to a transmission for a door lock with a bolt and at least one push rod carrying at least one locking element, or the like with a strike plate. a fixed frame cooperates, the lock bit of a lock cylinder, in particular profile cylinder, drives a radially slotted, ring-shaped drive pinion, the rotational movement of which is transmitted via at least one idler gear to a gearbox, the output side of which drives a drive rod which can be moved transversely to the bolt in the lock housing and with which or is coupled to the push rods. Such a transmission is known for example from DE-PS 30 34 764. It is about thereby a door lock with so-called multi-point locking, ie the door is locked to the fixed frame not only in the area of the bolt of the actual lock, but also in other places, especially above and below this bolt, the corresponding locking elements on or the push rods are located which, when the key is actuated, are brought into the locking position or into the release position simultaneously with the bolt of the lock. Locks with such a gearbox are normally attached to apartment entrance doors or exterior doors, which are better secured on the one hand by the multi-point locking than doors with only a single bolt of the lock and which are also secured by the multi-point locking against warping.

The force for locking all bolts is therefore only caused by turning the key inserted in the locking cylinder. Especially if the door is slightly warped, a considerable amount of effort may be necessary, which weaker people such as children or old people can only exert thanks to the gear ratio.

The known lock uses a conventional multi-stage gear transmission. The disadvantage of this gearbox is its large space requirement. Because such locks have to be supplied with different backset sizes and handle spacings, this is especially the case with small ones Backset and small handle spacing space problems. If an entire, graded series of locks is to be equipped with the same gear, its permissible size depends on the most unfavorable space conditions. In addition, the known gearboxes require measures to block the introduction of force via the locking elements in the gearbox in the event of a break-in.

The object of the invention is therefore to design a transmission of the type described above so that it has a minimal space requirement so that it can also be installed in a lock with a small backset and small pusher distance, and in addition there is sufficient security against opening by force application the locking elements is guaranteed.

To solve this problem, the invention proposes that the transmission according to the preamble of claim 1 is a planetary gear. Planetary gears are already known as such, but their application or installation in a door lock is new. They are characterized by a very compact design with a sufficiently large transmission ratio. The construction as well as the adaptation and installation in the door lock pose no difficulties. If such a planetary gear can be accommodated in a lock with a small backset and small handle spacing, it naturally has larger ones in all others Locks in a lock series Space where the backset and / or the handle spacing is larger. Forcing a force on the locking points, for example in the event of a break-in attempt, acting on the or one of the locking elements of the or a push rod requires such a force that, particularly because of the poor accessibility, opening the lock from there is practically impossible.

A further development of the invention is characterized in that the driven gear of the planetary gear is coupled to the drive rod via a pin-slot connection. Such a pin-slot connection is characterized by a particularly low technical outlay, which is why it has advantages over, for example, a toothed rack and pinion connection. The pin-slot connection is also advantageous at this point in terms of assembly and in view of low wear.

A further embodiment of the invention provides that the driven gear of the planetary gear carries a drive pin which projects transversely to its plane and which engages in a drive rod slot which is preferably open at the edge and extends transversely to the direction of movement of the drive rod. The open-edge slot contributes to simple assembly and disassembly. The drive rod itself can be designed, for example, as a stamped part, so that only low manufacturing costs are incurred.

In order to reduce the surface pressure and thus to be able to dispense with expensive materials in this area and to ensure low wear, the drive pin is mounted in a particularly preventive manner by means of a sliding block in the drive rod slot. The sliding block is a small and inexpensive element that can be easily replaced if necessary.

A particularly preferred embodiment of the invention is characterized in that the drive pin is approximately in a first dead center position when the door is closed. This gives a particularly favorable ratio of the angle of rotation of the key to the stroke of the drive rod, i.e. it can be used for the adjustment of the drive rod quasi the full diameter of the circle on which the drive pin moves from the open position of the bolt and the locking elements to the closed position.

It then indirectly follows that, according to a further variant of the invention, the drive pin is in a rotational position of the locking bar corresponding to the key withdrawal position, approximately in a second dead center position. In relation to the lock built into the door and equipped with this gear mechanism, this second dead center position preferably represents an upper dead center position, ie when the door is locked, the sliding block moves on one Arc of approximately 180 ° from top to bottom. It was assumed that the locking cylinder was located below the gearbox. The sliding block is therefore located in the outer area of the open slot, both with the bolt closed and the bolt closed. The transmission ratio is preferably chosen so that the rotation angle of approximately 180 ° of the sliding block is assigned two full revolutions of the key, ie there is preferably a total transmission ratio of approximately 1: 4.

In the known lock cylinders or profile cylinders, the lock bit must assume a precisely predetermined rotational position with respect to a longitudinal central axis of the lock cylinder when the key is withdrawn and when the key is inserted. The lock bit is not in a symmetrical position with respect to the lock cylinder, rather it is rotated by a certain angle with respect to this symmetrical position, which enables the locking cylinder to be inserted and removed from the lock. As a result, the lock cylinder is secured against removal from the lock when the key is removed. The key withdrawal position is different for the different lock cylinder manufacturers. There is a total angle of approximately 135 ° between the maximum occurring extreme positions - based on a longitudinal median plane through the locking cylinder. According to the drawing, the lock bit can be inclined at an angle of 45 ° in one case protrude downwards or, in another case, project transversely to the other side, its central plane forming an angle of 90 ° with the longitudinal central plane of the locking cylinder. Of course, there are other trigger angle positions of the locking bit for other makes between the mentioned trigger positions.

If one assigns the second, in particular upper dead center position of the drive pin to the key withdrawal position in the above-mentioned advantageous manner, then only very small angular deviations of the drive pin from the exact upper dead center position result in particular due to the above-mentioned ratio of preferably 1: 4 in the individual lock cylinder designs. As a result, the sliding block takes up almost the same height in all common locking cylinders or profile cylinders when the bolt is withdrawn, so that the entire stroke can always be fully utilized regardless of the make of the individual locking cylinder.

A further development of the invention is characterized in that the drive rod carries at least one transversely projecting pin which forms a bolt drive device with an oblique slot of the bolt. A downward movement of the drive rod results in an outward movement due to this oblique slot and the action of the pin on the latter, that is to say the locking of the bolt: vice versa if the key turns in the opposite direction against the upper edge of the oblique slot, whereby the bolt is withdrawn again.

A particularly preferred embodiment of the invention describes claim 11. This lock is in addition to the bolt and the push rod or push rods with locking elements also equipped with a latch, which can be withdrawn in a known manner by means of a pusher but also with the help of the key. So there is no difficulty in using a planetary gearbox, i.e. take advantage of the rotary movement of one of the wheels of the planetary gear for adjusting, in particular shifting a change, which in turn acts on the trap or a tail tail, so that the trap is retracted in a known manner against the resistance of a return spring.

Further configurations and advantages resulting therefrom result from the following description of two exemplary embodiments.

Figur 1

eine Draufsicht auf ein Schloß mit dem erfindungsgemäßen Getriebe bei abgenommenem Deckel des Schloßgehäuses;

Figur 2

in vergrößertem Maßstab einen Ausschnitt aus diesem Schloß im Bereich des Planetengetriebes;

Figur 3

eine der Figur 2 entsprechende Darstellung einer abgewandelten Ausführungsform;

Figur 4

schematisch den Bereich der Ankupplung des Planetengetriebes an die Treibstange;

Figur 5

schematisch eine Stirnansicht eines Profilzylinders mit dem üblichen Bereich der Schlüssel-Abzugsstellungen des Schließbarts bei verschiedenen Fabrikaten;

Figuren 6 und 7

den schematischen Getriebeplan des Planetengetriebes.

The drawing shows these exemplary embodiments. Here represent:

Figure 1

a plan view of a lock with the transmission according to the invention with removed Cover of the lock housing;

Figure 2

on a larger scale a section of this castle in the area of the planetary gear;

Figure 3

a representation corresponding to Figure 2 of a modified embodiment;

Figure 4

schematically the area of the coupling of the planetary gear to the drive rod;

Figure 5

schematically an end view of a profile cylinder with the usual area of the key withdrawal positions of the lock bit in different makes;

Figures 6 and 7

the schematic transmission plan of the planetary gear.

In a lock case 1 of a door lock, a bolt 2 and a latch 3 can be moved back and forth in the sense of the double arrow 4. The latch 2 is actuated with the aid of a key, not shown, which is inserted into a locking cylinder 5 perpendicular to the image plane of FIG. 1. In Figures 1 and 5, this lock cylinder is only shown schematically, ie without the keyhole. It is a profile cylinder of known design. It is equipped with a lock bit 6 which, except during assembly, projects radially beyond the lock housing and can be rotated with the aid of the key in the direction of the double arrow 7 (FIG. 5). The lock bit engages between the ends of a radially slotted annular drive pinion 8, which is rotated in the sense of the respective key rotation. This rotary movement is transmitted via at least one, but in the exemplary embodiment via two parallel intermediate gears 9 and 10 to a gear which is designed according to the invention as a planetary gear 11. The output gear 12 of the planetary gear carries a pin 13 (Figures 4 and 6) which engages in a slot 14 of a drive rod 15. A sliding block 16 is preferably interposed.

On the drive rod 15 there is a further pin 17, which is displaceable in an oblique slot 20 of the bolt 2 (Figure 1). A rotation of the key in one direction of rotation causes a rotation of the driven wheel 12 of the planetary gear 11 in the direction of arrow 19 and due to the coupling of this driven wheel with the drive rod 15 via the drive pin 13 and the sliding block 16, a displacement movement of the drive rod 15 in the direction of the arrow 18 the pin 17 against the lower flank of the oblique slot 20, the inclination of which is chosen in accordance with FIG. 1 such that this results in a preliminary movement of the bolt 2 in the direction of the arrow 21. Analogously one reaches one Close the bolt 2 by turning the key in the opposite direction.

In the exemplary embodiments, a push rod 22 or 23 is coupled to the upper and lower ends of the drive rod 15. These are located behind a faceplate 24 to which the lock case 1 is attached. Each push rod carries at least one locking element, not shown but known per se, which or the like with a striking plate. works together on a fixed frame. As a result, this door can be locked in several places at least on the closing side with respect to the fixed frame.

The drive pin 13 assumes a lower or first dead center position 25 in FIG. In contrast, the upper or second dead center position 26 is offset by approximately 180 °.

The key can only be withdrawn or inserted from the locking cylinder in a very specific rotational position of the ring carrying the locking bit 6. According to FIG. 5, this position differs from a symmetrical position to the longitudinal center plane 27. This prevents the lock cylinder from being pushed out or pulled out of the lock case when the key is removed. The different manufacturers of the locking cylinders select different key withdrawal positions of the locking bit 6. They extend in a range 28 of approximately 135 °, whereby however, for the key withdrawal position, the alignment with respect to the longitudinal center plane 27 is excluded, as said. FIG. 5 shows two locking bit withdrawal positions for two locking cylinders on the market and is provided with the reference numbers 6 and 6a. Lockbutton trigger positions from other manufacturers can be in between. This leads to the fact that in the case, for example, of a lock bit withdrawal position of the lock bit 6, the drive pin 13 is located somewhat to the right of the vertical plane of symmetry 29 of the driven gear 12 of the planetary gear, while in a pull position 6a of another lock cylinder 5a the drive pin 13a is in the second dead center position 26 is located somewhat to the left of the vertical plane of symmetry 29. Relative to the stroke 30 of the drive rod 15, this results in a slight height difference 31, which a drive rod 15 occupies in a locking cylinder 5 compared to a driving rod in a locking cylinder 5a. This height difference 31 is irrelevant to the bolt 2 or the locking elements attached to the push rods 22 and 23. In this respect, it does not matter which key withdrawal position the lock cylinder used has, if the usual embodiments are used.

The overall transmission ratio in the exemplary embodiment is approximately 1: 4, ie the drive pin 13, 13a runs through with a double turn of the key an angle of approximately 180 ° and this results in a maximum stroke of the drive rod 15.

According to FIG. 3, the drive pin 13 of the driven wheel 12 extends, so to speak, from the underside of the driven wheel 12 downwards, ie away from the viewer. On the opposite side of the drive wheel directed towards the viewer, several, preferably three, journals 32, which extend upward, ie out of the plane of the picture, are evenly distributed around the circumference, a planet gear 33 being rotatably mounted on each.

Their teeth mesh on the one hand with a fixed, internally toothed ring gear 34 of the planetary gear, and on the other hand with an inner pinion 35. The latter is arranged coaxially with the driven gear 12, but can be rotated independently. On the other hand, the inner pinion 35 is non-rotatably connected to a gear 36, in particular made in one piece. According to Figures 6 and 7, this gear 36 is in drive connection with the intermediate gears 9 and 10.

Thus, the power flow from the key via the lock bit 6 to the drive pinion 8 and from there via the intermediate gears 9 and 10 to the gear 36. The rotationally connected or integrally manufactured inner pinion 35 drives the planet gears 33, which are fixed on the inside Roll off sprocket 34. Via the trunnion 32, this leads to a rotation of the driven wheel 12 of the planetary gear 11. The ring gear 34 can be formed directly on the gear housing 37, which is preferably a die-cast zinc. Instead, however, a separate production as a ring and an insertion into a corresponding receptacle of the gear housing is also possible. This applies in particular when higher strengths are required than zinc die-casting offers.

In the embodiment shown in Figure 3, a stop 38 is attached to the gear 36, in particular molded. According to FIG. 1, it works together with a change lever 39, the upper end 40 of which is in front of a trap tail 41. In this case, the change lever is formed in two parts, the upper change lever part 42 being rotatably mounted on a follower 43, into which the mandrel of a lever for manual actuation of the latch 3 can be inserted. If the change lever 39 is moved upwards using the stop 38, the upper end 40 of the upper change lever part 42 presses against the latch tail 41 and thereby causes the latch 3 to be retracted in the direction of the arrow 44. A return spring 45 places the latch 3 in the drawing Starting position back when the force on the handle or key is no longer present.

Overall, due to the use of one Planetary gear instead of a conventional gear transmission, the required ratio with the smallest space requirement and with few components. Because the drive pin 13, 13a assumes a dead center position when the door is closed, the transmission is locked when the force is applied to the locking elements of the push rod or to the bolt 2.

The embodiment of Figure 3 differs from that of Figure 2 in that in the latter the side distance of the intermediate wheels 9 and 10 is chosen to be small, while it is larger in Figure 3. As a result, the transmission of FIG. 2 is narrower than that of FIG. 3, but it is built somewhat higher. Through the inclination of the intermediate wheels 9 and 10, additional space is gained in height, but this is again at the expense of the width.

Claims (13)

Gearbox for a door lock with a bolt (2) and at least one push rod carrying at least one locking element (22, 23) or the like with a striking plate. a fixed frame cooperates, the locking bit (6) of a locking cylinder (5), in particular profile cylinder, drives a radially slotted, ring-shaped drive pinion (8), the rotational movement of which is transmitted via at least one intermediate wheel (9, 10) to a gearbox, the driven side of which drives a drive rod (15) which is displaceable transversely to the bolt (2) in the lock housing (1) and is coupled to the push rod (s) (22, 23), characterized in that the transmission is designed as a planetary transmission (11). Transmission according to claim 1, characterized in that the driven wheel (12) of the planetary gear (11) is coupled to the drive rod (15) via a pin-slot connection (13, 14). Transmission according to claim 2, characterized in that the driven wheel (12) of the planetary gear (11) carries a drive pin (13) which projects transversely to its plane and which extends in a preferably open edge which extends transversely to the direction of movement (21) of the drive rod (15) Espagnolette slot (14) engages. Transmission according to claim 3, characterized in that the drive pin (13) is mounted in the drive rod slot (14) by means of a sliding block (16). Transmission according to claim 3 or 4, characterized in that the drive pin (13) is approximately in a first dead center position (25) when the door is closed. Transmission according to claim 5, characterized in that the drive pin (13) is in a rotational position of the locking bar (6) corresponding to the key withdrawal position, approximately in a second dead center position (26). Transmission according to at least one of the preceding claims, characterized by a total transmission ratio of approximately 1: 4. Transmission according to at least one of the preceding claims, characterized in that the output gear (12) of the planetary gear carries on its side opposite the drive pin (13) several, in particular three, bearing pins (32) distributed uniformly on the circumference for each planet gear (33), their teeth mesh on the one hand with an enveloping, fixed, internally toothed ring gear (34) and on the other hand with an inner pinion (35) which is arranged coaxially to the driven gear (12) is. Transmission according to claim 8, characterized in that the inner pinion (35) is connected in a rotationally fixed manner to a gearwheel (36), in particular is made in one piece, which is in meshing engagement with the intermediate gear (s) (9, 10). Transmission according to at least one of the preceding claims, characterized in that the drive rod (15) carries at least one transversely projecting pin (17) which, together with an oblique slide (20) of the bolt (2), forms a bolt drive device. Transmission according to at least one of the preceding claims, characterized in that the gearwheel (36) connected to the intermediate gears (9, 10) is at the same time an actuating element for a so-called change lever (39) for key actuation of a latch (3), the gearwheel ( 36) carries a stop element (38) which interacts with a driving edge of the change lever (39). Gearbox according to at least one of the preceding claims, characterized in that the planetary gear (11) for housing a compact installation unit for the door lock is a gearbox housing (37) with a lid. Transmission according to claim 12, characterized in that a bearing shell for the drive pinion (8) and preferably also bearing axles for the intermediate wheels (9, 10) are attached to the transmission housing (37).

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