Compact lock with spindle drive

Abstract

A lock (2, 3) for a door or window of a building is proposed, comprising a lock housing (32) in which a lock follower (31) and a bolt element (33, 34) driven by the follower are housed, and a motor drive (4) for actuating the bolt element (33, 34). To ensure the lock is as compact as possible while maintaining high operational reliability, it is proposed that the motor drive (4) be arranged in the lock housing (32) between the lock follower (31) and the back wall (36), and that the motor drive (4) be designed as a spindle drive, wherein the spindle (5) has a first section (54) with a spindle thread (52) and a second section (55) with a smaller diameter than the spindle thread (52).

Description

[0001] The invention relates to a lock for a door or window of a building according to the features of the preamble of claim 1.

[0002] In practice, such motorized locks are used for single-leaf or double-leaf revolving doors of a building to enable remote unlocking or locking of the door.

[0003] EP 0 935 039 A1 shows a lock with a lock housing in which a motor with a spindle drive is arranged to actuate a bolt element of the lock. The lock can also be operated manually either via a cylinder lock or via a rotary knob on the inside. A disadvantage of the lock is its relatively large lock housing, which means it cannot be installed in standard doors without enlarging the available space.

[0004] EP 1 283 318 A1 discloses a lock as a multi-point locking device. The lock has a central lock housing with a lock follower and a locking cylinder, as well as a bolt and a latch as locking elements. Furthermore, the lock features a multi-point locking mechanism actuated by a bolt rod. A motor module with a spindle drive can be mounted on the bolt rod to operate the lock motor-driven. The disadvantage here, too, is that a special mounting frame must be provided for the motor, which means that the door into which the lock is installed requires additional modification.

[0005] From EP 2 843 163 A2, a locking device for a partition wall element is known. This locking device also has a spindle drive for driving a carriage.

[0006] The object of the present invention is to provide a motorized lock that is particularly compact and space-saving while offering high operational reliability. In particular, the motor drive should allow the lock to fit into conventional installation spaces in doors and windows, so that no additional modifications to the door or window are required when installing the motorized lock compared to installing a purely mechanically operated lock. Specifically, the lock should have external dimensions that do not exceed those specified in DIN 18 251.

[0007] This problem is solved according to the invention by a lock having the features of claim 1.

[0008] According to the invention, a lock for a door or window of a building is proposed, in particular a mortise lock, preferably an active-leaf lock or a passive-leaf lock, with a lock housing in which a lock follower and at least one bolt element driven by the lock follower are received, wherein the lock housing has a lock base, a lock top, and a lock faceplate, as well as a rear wall arranged opposite the lock faceplate, and with a motor drive comprising a drive motor, a spindle, a spindle nut linearly movable on the spindle, and a coupling connecting the spindle to the drive motor. It is essential that the motor drive is arranged in the lock housing between the lock follower and the rear wall, and that the spindle has a first section with a spindle thread and a second section with a smaller diameter than the diameter of the spindle thread or the first section.

[0009] Advantageously, the spindle has sections with different diameters. The first section, with its spindle thread, guides and supports the spindle nut. This diameter cannot be reduced arbitrarily, as the requirements for a reliable drive necessitate a specific diameter for the spindle thread. The second section of the spindle has a smaller diameter than the spindle thread or the first section, thus enabling a more compact design. In particular, lock components can be positioned closer to the spindle, or the spindle can be positioned closer to the lock components. This allows for a higher packing density within the lock and consequently, more compact dimensions for the lock housing.

[0010] Preferably, the lower limit of the diameter of the second section is determined by the torque to be transmitted from the motor to the spindle nut. Surprisingly, it has been found that the diameter of the second section can be significantly smaller than the diameter of the spindle thread. According to the invention, this is used to achieve a more compact design of the lock housing.

[0011] In particular, it may be provided that the diameter of the second section is less than 80% of the diameter of the first section or the spindle thread, or less than 65% of the diameter of the first section or the spindle thread, or less than 50% of the diameter of the first section or the spindle thread.

[0012] Preferably, the diameter of the spindle is constant in the first section, i.e., in the section containing the spindle thread. This means that the spindle thread has a constant diameter along its entire length.

[0013] The lock can be designed as a mortise lock, in particular as an active leaf lock for one leaf of a double-leaf door, or as a mortise lock for a single-leaf door.

[0014] The lock can also be designed as a mortise lock for a passive wing, preferably as a passive wing lock for a fixed wing of a double-leaf door.

[0015] In particular, the lock can be designed as a mortise lock for tubular frame doors or tubular frame windows.

[0016] Preferably, the term "lock housing" refers to a housing for receiving lock components and / or locking elements. In particular, the lock housing has a faceplate on its front. Lock components include, for example, components of the lock mechanism such as levers, gears, guides, or a sliding plate. The lock housing can be made of a metal, such as sheet steel or aluminum.

[0017] Preferably, the term "locking element" refers to a lock bolt and / or a lock latch and / or a locking bar and / or a latch slide and / or a bolt slide.

[0018] The lock housing can have side walls on its narrow sides. These side walls can completely enclose the lock housing. Alternatively, the side walls can only partially enclose the lock housing and have openings for locking elements or lock connections, such as bolt rods or connecting cables. The rear wall of the lock preferably closes off the lock housing at the rear. The rear wall can be a completely closed wall or a partially open wall.

[0019] Preferably, the lock base or top can each be designed as a flat plate. This has the advantage that, for example, the lock base can be manufactured as a simple stamped part. Similarly, the lock top can also be manufactured as a simple stamped part. To keep the dimensions of the lock housing as small as possible or to achieve a high packing density, the lock base and / or top can be designed to have recesses for lock components. For example, the drive motor can partially engage in or pass through recesses in the lock base and / or top. This allows the use of a drive motor with a larger diameter.

[0020] In a preferred embodiment, the drive motor can be arranged below the lock cylinder and the first section of the spindle above the lock cylinder, or the drive motor can be arranged above the lock cylinder and the first section of the spindle below the lock cylinder. This results in a particularly space-saving arrangement of the motor drive, since the drive motor and the spindle are, so to speak, distributed along the length of the lock housing.

[0021] Preferably, the second section of the spindle can be arranged between the first section of the spindle and the drive motor or the coupling. This ensures that the spindle nut is positioned, so to speak, at the end of the spindle and can be moved up to the top or bottom of the lock housing.

[0022] In particular, the second section of the spindle with the smaller diameter can be designed as a tapered section. Specifically, the second section can be designed as a narrowing of the spindle and / or have a concave contour. This tapering or narrowing of the diameter creates a smooth transition between the different diameters. This allows for improved force transmission along the spindle and more cost-effective manufacturing of the spindle, for example, as a casting and / or milled part.

[0023] For a compact design, the spindle is arranged with such a small distance to the lock nut that the lock nut engages in the second section of the spindle in such a way that the spindle thread, viewed in the axial direction of the spindle, partially covers the lock nut.

[0024] Advantageously, the lock cylinder can be designed with a smaller radius in the center than on the front and back (or outer) sides, in order to create a recess for the spindle. This allows the spindle, with its second section, to be positioned at least partially between the front and back of the lock cylinder. This enables the spindle to be positioned very close to the center of the lock cylinder, thus making good use of the lock's installation space.

[0025] Preferably, the spindle may have a third section with a smaller diameter than the first section or the spindle thread. This allows additional drive elements of the lock mechanism and / or lock components to be packed closer to the spindle. For example, a lever and / or a sensor and / or a switchable pawl can be designed to engage at least partially in the third section in order to keep the dimensions of the lock housing as compact as possible.

[0026] In particular, it may be provided that the third section of the spindle is arranged between the second section and the drive motor or the coupling, and that the diameter of the spindle between the second section and the third section is larger than the diameter in the second section and larger than the diameter in the third section.

[0027] Advantageously, one design may provide for the outer diameter of the drive motor to be larger than the backset of the lock. For example, the backset of the lock may be 15 mm, and the outer diameter of the drive motor may be 16 mm or more. This allows the use of a high-torque motor even with locks that have a very small backset.

[0028] Preferably, the lock can be designed as a tubular frame lock, with the height of the lock housing being a maximum of 200 mm.

[0029] In a preferred embodiment, the lock may be designed as a passive wing lock and have an upper locking bolt and a lower locking bolt as locking elements, wherein the upper locking bolt is slidably mounted in the lock housing via an upper locking bolt connection slide and the lower locking bolt is slidably mounted via a lower locking bolt connection slide, and the spindle nut directly drives the upper locking bolt connection slide, or the spindle nut directly drives the lower locking bolt connection slide in order to unlock the lock by motor.

[0030] Alternatively, the lock may be designed as an active-wing lock and have a locking bolt as a locking element, which is movable in the lock housing between an unlocking position retracted into the lock housing and a locking position excluded from the lock housing, and the spindle nut drives the locking bolt by means of a lever or a sliding plate in order to unlock the lock by motor, or to move the locking bolt into the unlocked position.

[0031] To achieve mechanical protection or protection against contamination, the rear wall of the lock housing may be designed to be closed, or at least closed in the area of ​​the spindle.

[0032] In an advantageous embodiment, the motor drive can be designed as a replaceable assembly. This replaceable motor drive allows for easy repair of the lock by simply replacing the defective motor drive with a new one. Furthermore, the motor drive can also be omitted, for example, to create a lock that can be operated entirely manually.

[0033] Advantageously, it can be provided that a control device connectable to the motor drive is arranged in the lock housing, wherein the control device has a first sensor for detecting a first position and a second sensor for detecting a second position of the spindle nut, and wherein the control device controls the drive motor to move between the first position and the second position.

[0034] The figures show exemplary embodiments of the invention, which are described below. These include: Fig. 1 shows an example of a locking device with a lock according to the invention; Fig. 2 shows a schematic view of a lock according to the invention; Fig. 3 shows an enlarged view of the motor drive made of Figure 2 ; Fig. 4 the spindle in a cutaway view.

[0035] The figures show exemplary embodiments of the lock 2, 3 according to the invention. These are not to be understood as limiting. In the figures, components that function identically are designated with the same reference symbols. A person skilled in the art can, using their practical skills, combine the different embodiments shown within the scope of protection defined by the claims without departing from the inventive concept.

[0036] The Fig. 1Figure 1 shows a schematic representation of a locking device 1 with locks 2, 3 according to the invention on a double-leaf door 11. The double-leaf door 11 has a fixed leaf 14 and an active leaf 15. The fixed leaf 14 is pivotally mounted on a door frame 12 of the double-leaf door 11 via hinges 131, 132. Likewise, the active leaf 15 is pivotally mounted on the door frame 12 of the double-leaf door 11 via hinges 133, 134.

[0037] The active leaf 15 has a panic lock 2 as a lock 2 according to the invention, which can be operated via a door handle 21. The panic lock 2 is designed as a self-locking panic lock 2 and has a self-extending bolt and a latch. The panic lock 2 can also be operated manually or remotely via a motor drive. The motor drive is electrically connected by means of a connecting cable 161, which is routed through the active leaf 15 and over the door frame 12 by means of a flexible cable transition 171.

[0038] The fixed leaf 14 incorporates a passive leaf lock 3 or a multi-point locking system 3 as a lock 3 according to the invention. The multi-point locking system 3 has an upper multi-point locking bar 33 and a lower multi-point locking bar 34.

[0039] In the presentation of the Fig. 1The multi-point locking system 3 is locked, meaning that the two locking bolts 33 and 34 are extended and lock the fixed leaf 14 to the door frame 12 and the floor. The multi-point locking system 3 can be manually unlocked via a lock follower 31. Furthermore, the multi-point locking system 3 has a motor by means of which it can be unlocked automatically. The motor's connection cable 16 is routed through the fixed leaf 14 and over the door frame 12 by means of a flexible cable transition 17. The multi-point locking system 3 has a latch receptacle and a bolt receptacle into which the locking elements of the panic lock 2, i.e., the latch and the bolt, can engage. The panic lock 2 can be unlocked by means of the multi-point locking system 3 via the latch slide and bolt slide, respectively.This means that when the locking bolt 3 is unlocked, the panic lock 2 is unlocked first, allowing the active leaf 15 to be opened, while the inactive leaf 14 remains locked via the locking bolts 33, 34. Only when the locking bolt 3 is fully unlocked can the inactive leaf 14 then be opened.

[0040] Fig. 2Figure 1 shows an embodiment of the lock according to the invention as a passive wing lock 3. The passive wing lock 3 has a lock housing 32 in which a lock follower 31 is rotatably mounted. Furthermore, an upper locking bolt 33 and a lower locking bolt 34 are mounted in the lock housing 32 as locking elements. The lock housing 32 is bounded at the front by a faceplate 35. Opposite the faceplate 35 at the rear of the lock 3, the rear wall 36 of the lock housing 32 is arranged. Accordingly, side walls are provided at the upper and lower narrow sides of the lock housing 32 to close off the lock. Furthermore, the lock housing 32 also includes a lock base 37, which is Fig. 3 is shown, as well as a castle ceiling not depicted in the figures, which was omitted for the sake of clarity.

[0041] The locking elements 33 and 34 of the lock 3 are each received in connecting slides. The upper locking bolt 33 is received in an upper locking bolt connecting slide 331. The lower locking bolt 34 is received in a lower locking bolt connecting slide 341. To lock the lock, the two locking bolt connecting slides 331 and 341 are actuated to extend the corresponding locking bolts 33 and 34 from the lock housing 32 into their locked position. To unlock the lock 3, the locking bolt connecting slides 331 and 341 are retracted into the lock housing 32, thereby retracting the locking bolts 33 and 34 into the unlocked position.

[0042] The drive of the locking bolt connecting slides 331, 341 can be carried out either manually by means of the lock nut 31, or remotely controlled by means of the motor drive 4.

[0043] The motor drive 4 comprises the drive motor 41 with the control unit 42, as well as the spindle 5 driven by the drive motor 41. The motor drive 4 is designed as a spindle drive. The spindle 5 has a first section 54 with a spindle thread 52, on which a spindle nut 51 is linearly guided. The spindle nut 51 interacts with the upper locking bolt connecting slide 331 to actuate it in the unlocking direction.

[0044] In the Figure 3 and 4 Spindle 5 is shown enlarged. Fig. 3 The spindle 5 is shown installed in the lock housing of the active wing lock 3. Figure 2 , and Figure 4 The spindle 5 is shown cut away without any further components.

[0045] In Fig. 3It is evident that the spindle 5 has several sections with different diameters. The first section 54, with the spindle thread 52, has a large diameter. The second section 55 adjoins the first section 54 in the direction of the drive motor 41. The second section 55 has a smaller diameter. The second section 55 is tapered, meaning it has a gradual transition from the smaller diameter of the second section 55 to the larger diameter of the spindle thread 52.

[0046] Below the second section, the spindle 5 has a third section 56, which also has a smaller diameter than the spindle thread 52. Below the third section 56 is the coupling 53 of the spindle, by which the spindle 5 is rotationally fixed to the drive motor 41.

[0047] As from Fig. 3As can be seen, the lock nut 31 engages in the second section 55 of the spindle 5. Furthermore, the lock nut 31 has a smaller diameter at its central section than at its two outer sections, so that the spindle 5 runs very close to the pivot point of the lock nut. These two reinforcing effects allow the dimensions of the lock housing 32 to be kept relatively compact. In particular, the spindle 5 running very close to the pivot point of the lock nut 31 enables the use of a drive motor 41 with a larger diameter than the backset of the lock 3. This allows for a particularly compact arrangement of the lock components in the lock 3 according to the invention. Moreover, a tubular frame lock can be realized which can be operated both motor-driven and manually, has dimensions according to DIN 18 251, and can be implemented with a backset of 15 mm. Reference symbol list

[0048] 1 Locking device 11 Double-leaf door 12 Door frame 131 Door hinge 132 Door hinge 133 Door hinge 134 Door hinge 14 Fixed leaf 15 Active leaf 16 Connection cable 161 Connection cable 17 Flexible cable transition 171 Flexible cable transition 2Active wing lock / panic lock 21Door handle 22Lock housing 3 Passive wing lock / drill lock 31 Lock spindle 32 Lock housing 33 Upper bolt rod 331 Upper bolt rod connection slide 34 Lower bolt rod 341 Lower bolt rod connection slide 35 Lock faceplate 36 Backplate 37 Lock base 4 Motor drive 41 Drive motor 42 Control unit 5 Spindle 51 Spindle nut 52 Spindle thread 53 Coupling 54 First section 55 Second section 56 Third section HHinterdornmaß Height of the castle

Claims

1. Lock (2, 3) for a door or window of a building, in particular a mortise lock, preferably an active-leaf lock (2) or a passive-leaf lock (3), with a lock housing (22, 32) in which a lock follower (31) and at least one bolt element (33, 34) driven by the lock follower (31) are received, wherein the lock housing (32) has a lock base (37), a lock top and a lock faceplate (35) as well as a rear wall (36) arranged opposite the lock faceplate (35), and with a motor drive (4) comprising a drive motor (41), a spindle (5) as well as a spindle nut (51) mounted linearly movable on the spindle (5) and a coupling (53) connecting the spindle (5) to the drive motor (41), characterized by thatthe motor drive (4) is arranged in the lock housing (32) between the lock nut (31) and the back wall (36), and that the spindle (5) has a first section (54) with a spindle thread and a second section (55) with a smaller diameter than the diameter of the spindle thread (52) or of the first section (54), and that the spindle (5) is arranged at such a small distance to the lock nut (31) that the lock nut (31) engages in the second section (55) of the spindle (5) in such a way that the spindle thread (52), viewed in the axial direction of the spindle (5), partially covers the lock nut (31).

2. Lock (2, 3) according to claim 1, characterized by thatthe diameter of the second section (55) is less than 80% of the diameter of the first section (54) or the spindle thread (52), or less than 65% of the diameter of the first section (54) or the spindle thread (52), or less than 50% of the diameter of the first section (54) or the spindle thread (52).

3. Lock (2, 3) according to one of claims 1 or 2, characterized by that the drive motor (41) is arranged below the lock nut (31) and the first section (54) of the spindle is arranged above the lock nut (31), or that the drive motor (41) is arranged above the lock nut (31) and the first section (54) of the spindle is arranged below the lock nut (31).

4. Lock (2, 3) according to one of claims 1 to 3, characterized by thatthe second section (55) of the spindle is arranged between the first section (54) of the spindle and the drive motor (41) or the coupling (53).

5. Lock (2, 3) according to one of the preceding claims, characterized by that the second section (55) with the thinner diameter is designed as a waisted section, in particular that the second section (55) is designed as a taper of the spindle (5) and / or has a concave contour.

6. Lock (2, 3) according to one of the preceding claims, characterized by that the lock nut (31) has a smaller radius in the middle than on the front and back of the lock nut (31) in order to form a recess for the spindle (5) such that the spindle (5) with its second section (55) runs at least partially between the front and back of the lock nut (31).

7. Lock (2, 3) according to one of the preceding claims, characterized by that the spindle (5) has a third section (56) with a smaller diameter than the first section (54) or the spindle thread (52).

8. Lock (2, 3) according to claim 7, characterized by that the third section (56) of the spindle (5) is arranged between the second section (55) and the drive motor (41) or the coupling (53), and that the diameter of the spindle (5) between the second section (55) and the third section (56) is larger than the diameter in the second section (55) and is larger than the diameter in the third section (56).

9. Lock (2, 3) according to one of the preceding claims, characterized by that the outer diameter of the drive motor (41) is larger than the backset dimension (H) of the lock, in particular that the backset dimension (H) of the lock is 15 mm and the outer diameter of the drive motor (41) is 16 mm or more.

10. Lock (2, 3) according to one of the preceding claims, characterized by that the lock is designed as a tubular frame lock, with the height (L) of the lock housing (32) being a maximum of 200 mm.

11. Lock (2, 3) according to one of the preceding claims, characterized by that the lock is designed as a passive wing lock (3) and has as locking elements an upper locking bolt (33) and a lower locking bolt (34), wherein the upper locking bolt (33) is slidably mounted in the lock housing (32) via an upper locking bolt connection slide (331) and the lower locking bolt (34) is slidably mounted via a lower locking bolt connection slide (341), and thatthe spindle nut (51) drives the upper locking bolt connecting slide (331) directly or via a pivot lever, or that the spindle nut (51) drives the lower locking bolt connecting slide (341) directly or via a pivot lever to unlock the lock by motor.

12. Lock (2, 3) according to one of claims 1 to 10, characterized by that the lock is designed as an active wing lock (2) and has as a locking element a locking bolt which is movable in the lock housing (22) between an unlocking position retracted into the lock housing (22) and a locking position excluded from the lock housing (22), and that the spindle nut (51) drives the locking bolt by means of a lever or a sliding plate in order to unlock the lock motorically or to move the locking bolt into the unlocked position.

13. Lock (2, 3) according to one of the preceding claims, characterized by that the rear wall of the lock housing (32) is closed, or at least is closed in the area of ​​the spindle (5).

14. Lock (2, 3) according to one of the preceding claims, characterized by that the motor drive (4) is designed as an interchangeable assembly.

15. Lock (2, 3) according to one of the preceding claims, characterized by that a control device (42) that can be connected to the motor drive (4) is arranged in the lock housing (32), wherein the control device (42) has a first sensor for detecting a first position and a second sensor for detecting a second position of the spindle nut (51), and wherein the control device (42) controls the drive motor (41) to move between the first position and the second position.

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