Door lock with latch bolt

Abstract

A door lock (1) according to the invention has a lock body (2), a latch bolt (4) and an auxiliary bolt (5). The door lock further comprises a rotatable lever member (7) rotatably connected to the body portion. When the latch bolt moves inside the door lock, the rotatable rod part (7) is arranged to pull the auxiliary bolt (5) inside the door lock. When the door lock (1) does not abut against the door frame, the latch bolt (4) is arranged to maintain its position regardless of the position of the auxiliary bolt (5).

Description

Technical Field

[0001] This invention relates to a door lock with a latch bolt. More specifically, this invention relates to a door lock in which the degree of protrusion of the latch bolt is controlled. Background Technology

[0002] In a door lock with a latch bolt, the latch bolt can be arranged in two different protruding positions with different degrees of projection. In the first position, the door can be pressed closed, whereby the inclined surface of the latch bolt strikes a stop plate in the door frame, thereby pressing the latch bolt against its spring inside the lock. The second protruding position of the latch bolt is intended for the actual locking of the door, and in this position, the door cannot be pressed closed. This position is called the deadlocked position.

[0003] As is well known, door locks also include an auxiliary bolt, the purpose of which is to prevent the latch bolt from moving to its outermost position (deadlock position) when the door is opened, and on the other hand, to allow the latch bolt to move to its outermost position under the push of its spring after the door is pressed closed.

[0004] A malfunction may occur if the auxiliary bolt is accidentally pressed in when the door is opened, and the latch bolt is simultaneously released to its outermost position, thus preventing the door from being closed by pressing. Summary of the Invention

[0005] The objective of this invention is to eliminate the aforementioned problems. This objective is achieved in the manner described in the independent claims. The dependent claims illustrate different embodiments of the invention.

[0006] A door lock according to the present invention includes a lock body, a latch bolt, and an auxiliary bolt. The latch bolt includes an inclined portion and a body portion. The auxiliary bolt includes a wedge-shaped portion and an arm portion. The door lock further includes a rotatable rod member rotatably connected to the body portion. The rotatable rod member includes a stop surface and a connecting surface. The arm portion includes opposing connecting surfaces, and the door lock includes opposing stop surfaces connected to the body portion.

[0007] The rotatable rod component is arranged to pull the auxiliary bolt inside the door lock when the latch bolt moves inside the lock. When the auxiliary bolt is pulled, the stop surface abuts against the opposing stop surface and the connecting surface abuts against the opposing connecting surface.

[0008] When the door lock is not against the door frame and the inclined portion is mainly outside the door lock, the latch bolt is arranged to hold its position by the retaining surface of the rotatable rod component and the opposing retaining surface of the lock body, regardless of the position of the auxiliary bolt.

[0009] When the door is not against the door frame, the retaining surface is arranged to abut against the opposing retaining surface in the position of the inclined portion, mainly outside the door lock. Attached Figure Description

[0010] The invention will be described in more detail below with reference to the accompanying drawings, in which... Figure 1 An example of a door lock according to the invention is shown, in which the bolt is in the locked position and the door is closed. Figure 2 The invention is shown when the latch bolt is pulled inside the door lock. Figure 1 Example, Figure 3 The invention is shown Figure 1 In this example, the latch bolt and auxiliary bolt are being pulled from inside the door lock. Figure 4 The invention is shown when the door is open and the latch bolt is in the first protruding position. Figure 1 Example, Figure 5 The invention is illustrated when the door is closed and the latch bolt moves toward the deadlock position. Figure 1 Example, Figure 6 Examples of the latch bolt, auxiliary bolt, and rocker arm according to the present invention are shown. Figure 7 An example of the latch bolt, auxiliary bolt, and rocker arm according to the invention within a modular structure is shown, and Figure 8 Examples of different embodiments of the joystick are shown. Detailed Implementation

[0011] Figure 1 An example of a door lock 1 according to the invention is shown with its bolt in a locked position (second protruding position) externally. In other words, the lock is in a locked state. The door lock 1 according to the invention has a lock body 2, a latch bolt 4, and an auxiliary bolt 5. The latch bolt includes an inclined portion 4A and a body portion 4B. The auxiliary bolt 5 includes a wedge-shaped portion 5A and an arm portion 5B. See also Figure 6 The door lock further includes a rotatable lever component 7 rotatably connected to the main body portion 4B. The rotatable lever component 7 includes a stop surface 8 and a connecting surface 9. The arm portion 5B includes an opposing connecting surface 10, and the door lock includes an opposing stop surface 11 connected to the main body portion 4B.

[0012] When the latch bolt 4 moves inside the door lock, the rotatable rod component is arranged to pull the auxiliary bolt 5 inside the door lock 1. Figure 2This illustrates the situation when the latch bolt is pulled inside the door lock (i.e., inside the lock body 2). The pulling force is transmitted to the latch bolt 4 via the force transmission member 14 from the follower 13 or the lock pin torsion element 16.

[0013] When the auxiliary bolt 5 is pulled, the stop surface 8 abuts against the opposing stop surface 11 and the connecting surface 9 abuts against the opposing connecting surface 10. Thus, when the latch bolt is moved inside the lock body, the auxiliary bolt also moves inside the lock body via the rocker arm 7.

[0014] Figure 3 Demonstrates the situation when the latch bolt is inside the door lock. Figure 1 The door lock. In other words, the lock is in the unlocked state, and the door can be opened when the lock is installed in the door. The auxiliary bolt 5 is also inside the door lock. Figure 3 In the middle, the handle (not shown in the figure) is pressed, thereby holding the latch bolt and the auxiliary bolt inside the lock, or more precisely, inside the lock body.

[0015] As described above, the door lock has a lock body 2. The lock body 2 includes a front plate 3 with bolt holes 25 through which the lock's latch bolt 4 is movably passable. Furthermore, the lock body 2 is provided with an operating shaft 21. The operating shaft is where a follower 13 is mounted. The follower is rotatably supported relative to the lock body 2 and, as shown, acts on the lock's latch bolt 4 via a separate force transmission member 14. Figure 1 and 2 In the example, force transmission member 14 includes a plate, a rod, and other parts, which together are referred to as force transmission members. For clarity, if it is stated in this specification that a force transmission member is connected to an element, it means that at least one part of the force transmission member (such as a rod) is sufficient to provide the connection to the element.

[0016] In practice, when the door lock has a handle or knob, the follower 16 can be affected from both sides of the lock housing. The handle or knob on one side of the lock is connected to a torsion unit 22, which is located on the same side of the follower 13 as the handle. The same arrangement exists on the other side of the door lock. The handle is mounted on a spindle, which is in direct contact with the torsion unit 13. The dashed circle 23 shows the spindle of the handle, which can be mounted on a door lock according to the invention.

[0017] The force required for handle operation is transmitted via a coupling component 24, which has two selectable operating positions: a force transmission coupling position and a force transmission decoupling position. In the force transmission coupling position, the locking bolt 4 can be moved by means of the handle, while in the force transmission decoupling position, the locking bolt 4 is correspondingly unaffected by the handle. Figure 1-5The force transmission coupling position is shown, driven, for example, by solenoid 26 via its cam plate 27. The operation of torsion unit 22, follower 13, coupling member 24 and solenoid or other actuator is known in itself, but the decoupling position of coupling member 24 is not shown in the figures.

[0018] Another way to move the latch bolt 4 is to turn the key to open the cylinder lock (not shown) attached to the cylinder shaft 15 of the lock. The cylinder shaft is where the cylinder lock and cylinder torsion element 16 are installed. The cylinder lock is connected to the cylinder torsion element 16, which in turn is connected to the force transmission member 14. After opening the cylinder lock, the force of turning the key is transmitted to the latch bolt 4 via the force transmission member 14, causing it to move inside the lock body. The lock according to the invention can be moved by either of these methods or by one of them.

[0019] When the door lock is not against the door frame and the inclined portion 4A is mainly outside the door lock, the latch bolt 4 is arranged to hold its position by the retaining surface 17 of the rotatable rod component 7 and the opposing retaining surface 18 of the lock body, regardless of the position of the auxiliary bolt 5. Figure 4 This situation is illustrated.

[0020] When the handle stops turning or the key turns back, there is no force to hold the latch bolt 4 inside the lock body 2. Therefore, the spring that biases the latch bolt 4 and the auxiliary bolt to the outside of the lock body causes the latch bolt and the auxiliary bolt to move and protrude from the lock body. The rocker arm 7 is held in the position where the stop surface 8 abuts against the opposite stop surface 11 by the movement of the auxiliary bolt 5 affected by the opposing connecting surface 10. In this position, when the latch bolt 4 moves out of the first protruding position (e.g., Figure 4 As shown, when the door is not against the door frame, the retaining surface 17 abuts against the opposing retaining surface 18. Thus, when the door is not against the door frame, the retaining surface 17 is arranged to abut against the opposing retaining surface 18 in the position primarily outside the door lock on the inclined portion 4A. Figure 4 As can be seen, the protruding position of the auxiliary bolt 5 is not restricted by the impact plate 6.

[0021] If in such Figure 4 In the scenario shown, when the door is opened, the auxiliary bolt 5 is accidentally pressed in, causing it to move inside the lock body 2, while the latch bolt 4 remains in the first protruding position. The coupling between the connecting surface 9 and the opposing connecting surface 10 is decoupled. The retaining surface 17 abuts against the opposing retaining surface 18 to prevent the latch bolt 4 from moving into the deadlock position.

[0022] Figure 5The diagram illustrates a closed door with the latch bolt 4 moving toward the locked position. The door, and therefore the lock 1, abuts against the door frame and the strike plate 6. The latch bolt 4 and the auxiliary bolt 5 collide with the strike plate, which drives both bolts to move inside the lock body. Then, the inclined portion 4A of the latch bolt moves toward the locked position through the hole 25 in the strike plate. The latch bolt and the auxiliary bolt are spring-loaded to protrude outwards from the lock body 2. The strike plate 6 prevents the wedge-shaped portion 5A of the auxiliary bolt from protruding further outwards from the lock body 2. Therefore, the arm portion 5B of the auxiliary portion also does not move, and the movement of the latch bolt 4 relative to the auxiliary bolt 5 allows the rocker arm 7 to rotate to a position that does not prevent the latch bolt from moving to the second protruding position. As described above, Figure 1 The second protruding position is shown, as well as the final position of the latch bolt when the door is closed.

[0023] Figure 6 An example of the latch bolt 4, auxiliary bolt 4, and rocker arm 7 according to the invention is shown. It can be seen that the rocker arm is rotatably connected to the main body portion 4B via a pivot 28.

[0024] Figure 7 An example of a modular structure 20 according to the invention, in which the latch bolt, auxiliary bolt, and rocker are located within the lock body, is shown. This modular structure embodiment includes a top cover 20A and a larger bottom cover 20B. The latch bolt, auxiliary bolt, and rocker are located within the modular structure. Therefore, the modular structure includes them. The modular structure 20 is connected to the lock body 2 and / or the front plate, thus providing corresponding support for the latch bolt, auxiliary bolt, and rocker if they are already directly mounted to the lock body. The modular structure facilitates installation and also makes it easier to provide different embodiments, such as using different latch bolt embodiments or different rocker embodiments.

[0025] Furthermore, the modular structure 20 can be used to provide support for a portion of the force-transmitting member, as shown in the figure. In the embodiment shown in the figure, the portion of the force-transmitting member supported on the modular structure is plate portion 14A. It is rotatably connected to the modular structure 20. In the embodiment shown in the figure, plate portion 14A is also rotatably connected to rod 29, which is also rotatably connected to the body portion 4B of the latch bolt. Thus, the modular structure can also be used to provide support connections for some portions of the force-transmitting member 14, which can also make installation easier. However, the use of the modular structure is merely one way of constructing a door lock according to the invention. The lock body 2 can also be used to provide support connections for portions of the force-transmitting member as well as for the latch bolt and auxiliary bolts.

[0026] Figure 8Examples of different embodiments of the rocker arm 7A are shown. In this embodiment, the stop surface 8A has a different shape on the rocker arm 7A. The opposing stop surface 11A is provided by a portion of the rod 29 rotatably connected to the main body portion 4B. Thus, the opposing stop surface 11A is connected to the main body portion. As mentioned above, the rod is part of the force transmission member 14. In other words, the opposing stop surface 11 can be part of a portion of the force transmission member 14.

[0027] Note that the preceding figures illustrate an alternative solution, in which the opposing stop surface 11 is part of the main body portion, more precisely, part of the surface of the main body portion 4A, and therefore has its own connection to the main body portion. The connecting surface 9 and the opposing connecting surface 10 are in... Figure 8 Zhongyu Figure 1-7 The same applies to the retaining surface 17B of the rotatable rod component. Figure 8 In the embodiments, it has the same as Figure 1-7 Different shapes are used in the embodiments. Therefore, the opposing retaining surfaces of the door lock also have the same shape as... Figure 8 The shape of the surface 17B is matched to the shape of the surface.

[0028] It is worth mentioning that the opposing retaining surface 18 can be disposed on the inner side of the lock body 2, as part of the lock body or as a part connected to the lock body. As shown in the figure, the opposing retaining surface 18 can also be part of the module structure 20. In other words, the module structure includes the opposing retaining surface.

[0029] exist Figure 1-7 As can be seen, the rotatable lever component 7 may include a protrusion 17A providing a retaining surface 17, and the lock body includes a recess 18A for the protrusion, the recess providing an opposing retaining surface 18. It can be noted that the opposing retaining surface may be part of the modular structure, or as described above, part of the lock body 2. When the door lock is not against the door frame and the latch portion is primarily outside the door lock, the protrusion 17A is arranged within the recess 18A. The protrusion abutting against the recess prevents the latch bolt from moving to a deadlock position.

[0030] Additionally, as can be seen in the figure, the opposing connecting surface 10 faces the front plate 3, and the opposing connecting surface 10 can be part of the pin 19. The pin is, in turn, part of the arm portion 5B.

[0031] As described above, the lock body may include a lock pin torsion element 16 and / or a follower 13 of the operating shaft 12, and a force transmission member 14 for moving the latch bolt 4 within the lock body. The force transmission member 14 is connected to the latch bolt 4 and also to the lock pin torsion element 16 and / or the follower 13 of the operating shaft.

[0032] although Figure 1-5The embodiments shown have an electric actuator (a solenoid or another electric actuator, such as an electric motor), but the door lock according to the invention can also be implemented without an electric component, so the door lock can be purely a mechanical lock.

[0033] It can be noted that the present invention can be made in many different ways. When the door lock is not against the door frame and the latch bolt is in its first protruding position outside the door lock, the latch bolt is arranged to maintain its position regardless of the position of the auxiliary bolt. Even if the auxiliary bolt is pressed once or several times inside the door lock, the latch bolt maintains its first protruding position. The operation of the door lock according to the present invention is more reliable.

[0034] It is obvious from the above that the present invention is not limited to the embodiments described herein, but can be practiced in many other different embodiments within the scope of the independent claims.

Claims

1. A door lock (1) having a lock body (2), a latch bolt (4) and an auxiliary bolt (5), the latch bolt including an inclined portion (4A) and a main body portion (4B), the auxiliary bolt (5) including a wedge portion (5A) and an arm portion (5B), characterized in that the door lock further includes a rotatable rod member (7) rotatably connected to the main body portion (4B), the rotatable rod member (7) including a stop surface (8) and a connecting surface (9), the arm portion (5B) including an opposing connecting surface (10), and the door lock including an opposing stop surface (11) connected to the main body portion. When the latch bolt (4) moves inside the lock, the rotatable rod component (7) is arranged to pull the auxiliary bolt (5) inside the lock (1). When the auxiliary bolt (5) moves inside the lock, the stop surface (8) abuts against the opposing stop surface (11) and the connecting surface (9) abuts against the opposing connecting surface (10). Furthermore, when the door lock (1) is not against the door frame and the inclined portion (4A) is primarily outside the door lock, the latch bolt (4) is arranged to hold its position by the retaining surface (17) of the rotatable rod member and the opposing retaining surface (18) of the door lock, regardless of the position of the auxiliary bolt (5). When the door lock is not against the door frame, the retaining surface (17) is arranged to abut against the opposing retaining surface (18) in the position of the inclined portion (4A) mainly outside the door lock.

2. The door lock according to claim 1, characterized in that the lock body (2) has a front plate (3) with a hole (25) for the latch bolt (4), the latch bolt and the auxiliary bolt being loaded with springs on the outside of the lock body (2).

3. The door lock according to claim 2, characterized in that the opposing connecting surface (10) faces the front plate (3).

4. The door lock according to claim 3, characterized in that the opposing stop surface (11) is part of the main body portion (4B).

5. The door lock according to claim 3, characterized in that the opposing stop surface (11) is part of a portion of the force transmission member (14).

6. The door lock according to any one of claims 3-5, characterized in that the rotatable lever member (7) includes a protrusion (17A) providing the retaining surface (17), and the lock body includes a recess (18A) for the protrusion, the recess providing the opposing retaining surface (18), and the protrusion is arranged in the recess when the door lock is not against the door frame and the latch portion is mostly outside the door lock, the protrusion abutting against the recess to prevent the latch bolt from moving to a deadlock position.

7. The door lock according to any one of claims 3-6, characterized in that the arm portion (5B) includes a pin (19), and the opposing connecting surface (10) is part of the pin (19).

8. The door lock according to any one of claims 1-7, characterized in that the door lock includes a modular structure (20) inside the lock body, the modular structure including the latch bolt (4), the auxiliary bolt (5) and the rotatable rod component (7).

9. The door lock according to claim 8, characterized in that the module (20) includes the opposing retaining surface (18).

10. The door lock according to any one of claims 1-9, characterized in that its lock body includes a lock pin torsion element (16) and / or a follower (13) of the operating shaft (21), and a force transmission member (14) for moving the latch bolt (4) inside the lock body, the force transmission member (14) being connected to the latch bolt (4) and also to the lock pin torsion element (16) and / or the follower (13) of the operating shaft.

11. The door lock according to claim 10, characterized in that the transmission member (14) includes a plate portion (14A) rotatably connected to the module structure.

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