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EP-4741609-A1 - A DOOR LOCK HAVING A LATCH BOLT

EP4741609A1EP 4741609 A1EP4741609 A1EP 4741609A1EP-4741609-A1

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 turnable lever member (7), which is turnably connected to the body part. The turnable lever member (7) is arranged to pull the auxiliary bolt (5) inside the door lock when the latch bolt is moved inside the door lock. When the door lock (1) is not against a door frame, the latch bolt (4) is arranged to remain its position regardless of a position of the auxiliary bolt (5).

Inventors

  • RAATIKAINEN, JUHA

Assignees

  • Abloy Oy

Dates

Publication Date
20260513
Application Date
20251021

Claims (11)

  1. A door lock (1) having lock body (2), a latch bolt (4) and an auxiliary bolt (5), the latch bolt comprising an oblique part (4A) and a body part (4B), the auxiliary bolt (5) comprising a wedge part (5A) and an arm part (5B), characterised in that the door lock further comprises a turnable lever member (7), which is turnably connected to the body part (4B), the turnable lever member (7) comprising a detent surface (8) and a connection surface (9), the arm part (5B) comprising a counter connection surface (10), and the door lock comprising a counter detent surface (11) in connection with the body part, which turnable lever member (7) is arranged to pull the auxiliary bolt (5) inside the door lock (1) when the latch bolt (4) is moved inside the door lock, the detent surface (8) being against the counter detent surface (11) and the connection surface (9) being against the counter connection surface (10) when moving the auxiliary bolt (5) inside the door lock, and when the door lock (1) is not against a door frame, the oblique part (4A) mostly outside the door lock, the latch bolt (4) is arranged to remain its position regardless of a position of the auxiliary bolt (5) by a retainer surface (17) of the turnable lever member and a counter retainer surface (18) of the door lock, which retainer surface (17) is arranged to be against the counter retainer surface (18) in said position of the oblique part (4A) mostly outside the door lock when the door lock is not against the door frame.
  2. A door lock according to claim 1, characterised in that 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 spring loaded outside the lock body (2).
  3. A door lock according to claim 2, characterised in that the counter connection surface (10) is towards the front plate (3).
  4. A door lock according to claim 3, characterised in that the counter detent surface (11) is a part of the body part (4B).
  5. A door lock according to claim 3, characterised in that the counter detent surface (11) is a part of one part of the force transmission means (14).
  6. A door lock according to any of claim 3 - 5, characterised in that the turnable lever member (7) comprises a projection (17A) which provides the retainer surface 17, and the lock body comprises a recess (18A) for the projection, which recess provides the counter retainer surface (18), and which projection is arranged to be in the recess when the door lock is not against a door frame, the latch part mostly outside the door lock, the projection against the recess preventing the latch bolt to move to the dead locked position.
  7. A door lock according to any of claims 3 - 6, characterised in that the arm part (5B) comprises a pin (19), and the counter connection surface (10) is a part of a pin (19).
  8. A door lock according to any of claims 1 - 7, characterised in that the door lock comprises a module structure (20) inside the lock body, the module structure comprising the latch bolt (4), the auxiliary bolt (5) and the turnable lever member (7).
  9. A door lock according to claim 8, characterised in that the module (20) comprises the counter retainer surface (18).
  10. A door lock according to any of claims 1 - 9, characterised in that it lock body comprises a lock cylinder torsion element (16) and/or a follower (13) of an operation axis (21), and force transmission means (14) to move the latch bolt (4) inside the lock body, the force transmission means (14) being in connection with latch bolt (4) and also with the lock cylinder torsion element (16) and/or the follower (13) of the operation axis.
  11. A door lock according to claim 10, characterised in that the transmission means (14) comprises a plate part (14A) being turnably connected to the module structure.

Description

Field of technology The invention relates to a door lock having a latch bolt. Especially the invention relates to a door lock wherein the extent of protrusion of the latch bolt is controlled. Prior art In door locks provided with a latch bolt two different protruding positions with different extent of protrusion may be arranged for the latch bolt. In the first position the door can be pressed to be closed whereby the oblique surface of the latch bolt hits a striking plate in the doorframe, which presses 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 of the latch bolt the door cannot be pressed to be closed. This position is called as a dead locked position. It is known that the door lock comprises also an auxiliary bolt the purpose of which is to prevent movement of the latch bolt into its outermost position (the dead locked position) when the door is open, and on the other hand to allow the latch bolt to move into its outermost position urged by its spring after the door is pressed closed. A malfunction may occur when the auxiliary bolt is by accident pressed in when the door is open, the latch bolt is simultaneously released into its outermost position and thus prevents closing of the door by pressing. Short description The object of the invention is to eliminate the problem said above. The object is achieved in a way described in the independent claim. Dependent claims illustrate different embodiments of the invention. A door lock according to the invention has lock body, a latch bolt and an auxiliary bolt. The latch bolt comprises an oblique part and a body part. The auxiliary bolt comprises a wedge part and an arm part. The door lock further comprises a turnable lever member, which is turnably connected to the body part. The turnable lever member comprises a detent surface and a connection surface. The arm part comprises a counter connection surface, and the door lock comprises a counter detent surface in connection with the body part. The turnable lever member is arranged to pull the auxiliary bolt inside the door lock when the latch bolt is moved inside the door lock. The detent surface is against the counter detent surface and the connection surface is against the counter connection surface when pulling the auxiliary bolt. When the door lock is not against a door frame, the oblique part mostly outside the door lock, the latch bolt is arranged to remain its position regardless of a position of the auxiliary bolt by a retainer surface of the turnable lever member and a counter retainer surface of the lock body. The retainer surface is arranged to be against the counter retainer surface in said position of the oblique part mostly outside the door lock when the door is not against the door frame. List of figures In the following, the invention is described in more detail by reference to the enclosed drawings, where Figure 1illustrates an example of a door lock according to the invention the bolt in the dead locked position, the door being closed,Figure 2illustrates the example of figure 1 according to the invention when pulling the latch bolt inside the door lock,Figure 3illustrates an example of figure 1 according to the invention the latch bolt and the auxiliary bolt being pulled inside the door lock,Figure 4illustrates an example of figure 1 according to the invention when the door is open and the latch bolt is in the first protruding position,Figure 5illustrates an example of figure 1 according to the invention when closing the door and the latch bolt moving towards the dead locked position,Figure 6illustrates an example of a latch bolt, an auxiliary bolt and a rocker lever according to the invention,Figure 7illustrates an example of a latch bolt, an auxiliary bolt and a rocker lever according to the invention within a module structure, andFigure 8illustrates an example of a different embodiment of the rocker lever. Description of the invention Figure 1 illustrates an example of a door lock 1 according to the invention when its bolt is outside in the dead locked position (the second protruding position). In other words, the lock is in a locked state. The door lock according to the invention1 has lock body 2, a latch bolt 4 and an auxiliary bolt 5. The latch bolt comprises an oblique part 4A and a body part 4B. The auxiliary bolt 5 comprises a wedge part 5A and an arm part 5B. See figure 6. The door lock further comprises a turnable lever member 7, which is turnably connected to the body part 4B. The turnable lever member 7 comprises a detent surface 8 and a connection surface 9. The arm part 5B comprises a counter connection surface 10, and the door lock comprises a counter detent surface 11 in connection with the body part 4B. The turnable lever member is arranged to pull the auxiliary bolt 5 inside the door lock 1 when the latch bolt 4 is moved inside the door lock. Figure 2 sh