HK1212001B - Door lock - Google Patents

Description

Door lock

Technical Field

The present invention relates to a door lock including a tilt bolt. In particular, the invention relates to a door lock with a tilt bolt, wherein the tilt bolt comprises a moving bolt segment. Such oblique bolts are also commonly called double-action bolts.

Background

Patent publications Fl 82287 and Fl 120416 propose oblique bolt structures having oblique bolts comprising bolt segments. These segments are arranged to be movable relative to the other parts of the bolt. As already stated, such oblique bolts are also called double-acting bolts. Both names are used herein. As can be seen from said patent publication, a double-acting bolt usually comprises a main body part, which is provided with the longitudinal axis of the panel of the door lock, and two bolt segments, which are pivotally supported into the main body part about its axis.

Such double-acting bolts are used in application places where the door lock must be such that the door can be opened by pushing in one direction or the other, when the locking means of the door lock is in a passive state. By a locking device is meant a device inside the lock with which the bolt of the lock can be locked into a locked position. In the locked position, the bolt is in an extracted position out of the lock body and the bolt cannot move into the lock body.

From said publication it is seen that both bolt segments have an inclined surface, which hits the striker plate when the door is closed, wherein the bolt segments are pressed inside the lock body. These bolt segments are pivotally connected into the body of the double acting bolt, wherein these bolt segments always form an inclined surface, which hits the striker plate when the door is closed or opened, regardless of the direction in which the door is turned. The striker plate thus presses the bolted section into the same position as the other bolted section when the door is being closed or opened. In this case, the flanks of the bolt segments form converging inclined surfaces. When the bolt is against the striker plate and partially in the opening of the striker plate (or door open), these bolt segments are in a position where the oblique bolt forms a dead bolt. If there are locking means in the lock and they are arranged to lock the oblique bolt in the extracted position, the oblique bolt thus acts as a dead bolt. If the locking device does not lock the tilt bolt, the tilt bolt acts as a tilt bolt, with respect to both rotational directions of the door.

The oblique bolts given above require lubricating grease in order to keep them in good working condition. If the grease runs out, they start to wear much faster than they do if there is lubrication. Furthermore, wear causes functional disturbances.

Disclosure of Invention

The object of the invention is to eliminate the disadvantages described above and to improve the functional reliability of the lock and the tilt bolt. These objects are achieved in the manner given in the independent claims. The dependent claims describe different embodiments of the invention. The invention is based on the idea of trying to reduce the stress of parts that are susceptible to wear, wherein they retain a longer function.

A door lock according to the invention comprises a lock body provided with a face plate with an oblique bolt. The tilt bolt is spring loaded toward the extracted position and includes a tip portion and a body portion. The tip portion is partly outside the lock body when in the extracted position, and both sides of the tip portion comprise inclined surfaces, so that the tip of the tip portion is narrower than the back of the tip portion. The lower and upper portions of the tip portion have recesses that extend from the tip to the back. The two recesses open on the end of the tip portion and on the other inclined surface, whereby the recess of the upper part opens on the inclined surface opposite to the recess of the lower part.

Both recesses have a turning piece comprising a bolt projection with an opposing surface on a first side and a support surface on the other side. The turning member further comprises a turning projection arranged to turn the turning member when the tilt bolt is moved from the retracted position to the extracted position. This occurs so that the turning projection abuts against the support surface inside the panel, at which time the counter surface is moved away from the inclined surface of the tip portion. In addition, the rotation piece includes a pushing protrusion having a pushing surface facing the counter-pushing surface of the back of the notch and a curved rotation surface facing the side of the notch on the other surface of the pushing protrusion.

The lock body has rollers on both sides of the tilt bolt between the sides of the lock body and the sides of the surface of the tilt bolt. These turning pieces are arranged to turn together with the bolt projections outwardly from the inclined surface in the extracted position of the inclined bolt. In this case, the rotor forms the edge of the dead bolt. The turning piece is further arranged to turn by an external force directed on the counter surface, whereby the pushing projection pushes the counter pushing surface with the pushing surface, causing the oblique bolt to move inwards towards the locking body, and the turning surface turns with respect to the side of the recess until the support surface of the bolt projection abuts the other side of the recess.

Drawings

In the following, the invention is described in more detail using the figures of the accompanying drawings, in which

Figure 1 shows an example of a door lock according to the invention,

fig. 2 shows a part of the example of fig. 1, the oblique bolt being inside the locking body,

fig. 3 shows a cross-section of a lock according to the invention, with the oblique bolt inside,

fig. 4 shows a cross-section of a lock according to the invention, the oblique bolt being on the outside,

fig. 5 shows another cross-section of the lock, with the oblique bolt inside,

FIG. 6 shows an example of an inclined bolt according to the present invention, an

Fig. 7 shows another cross section of the lock with the tilt bolt on the outside.

Detailed Description

Fig. 1 shows an example of a door lock 1 according to the invention. The door lock comprises a lock body 2 and a panel 3. The panel has bolt holes 4 for oblique bolts 5. In addition, in this example, the lock comprises an auxiliary wedge 6 to indicate the position of the door relative to the door frame and a dead bolt 7 to strengthen the locking of the door, wherein the locking can be performed by the combined effect of two bolts, i.e. an oblique bolt and a dead bolt. Also visible in this figure is a hole 8 of the axis of the button or knob and a position 9, for example, a cylinder/cylinder element for use with a key.

In fig. 1, the tilt bolt 5 is on the outside, or in the extracted position out of the lock body. In fig. 2, which shows a portion of fig. 1, the tilt bolt is inside, or in a retracted position. Fig. 3 and 5 also show the retracted position of the tilt bolt. Fig. 4 and 7 also show the tilt bolt in a pulled out position.

The tilt bolt then reciprocates in a linear movement through the bolt hole 4 in the panel 3 between the retracted position and the extracted locked position out of the lock body 2. The tilt bolt 5 is spring-loaded towards the extracted position and it comprises a tip portion 5A and a body portion 5B (see fig. 6). The tip portion is in an extracted position, partially outside the lock body.

The tip portion 5A comprises inclined surfaces 10A, 10B on both sides thereof such that the tip 51 of the tip portion is narrower than the back 52 of the tip portion. In the example of the figures, these inclined surfaces comprise slight curves or portions of different angles. These inclined surfaces may also be formed as flat surfaces. The tip portion has recesses 53A, 53B in its lower 55 and upper 54 portions. These recesses extend from the tip 51 of the tip portion to the back 52 of the tip portion. The two recesses open on the end of the tip 51 of the tip portion and the inclined surfaces 10A, 10B on both sides, so that the recess on the upper portion opens on the inclined surface opposite to the recess on the lower portion. These figures illustrate how the notches open on the opposite inclined surfaces.

Both recesses 53A, 53B have a turning piece 31A, 31B, comprising a bolt projection 32 with an opposing surface 33 on a first side and a support surface 34 on the other side. The turning member further comprises a turning protrusion 35 arranged to turn the turning member when the tilt bolt is moved from the retracted position to the extracted position. This occurs when pushed by the spring 43 affecting the tilting bolt, whereby the turning projection abuts against the support surface 40 inside the panel 3 and the counter surface 33 of the bolt projection leaves the inclined surface 10A, 10B of the tip portion. The turning piece further comprises a pushing projection 36 with a pushing surface 37 facing the counter pushing surface 38 of the back of the recess and a curved turning surface 39 on the other surface of the pushing projection 36 facing the side 41 of the recess. In addition, the confronting surface 33 of the bolt projection of the turning piece can include a portion that is wider than the rest of the turning piece.

The locking body has rollers 42 on both sides of the oblique bolt 5 between the sides 2A, 2B of the locking body and the sides of the oblique surface. These rollers produce easy movement of the tilt bolt between the extracted and retracted positions. The turning pieces 31A, 31B are arranged to turn outwards from the inclined surfaces 10A, 10B together with the bolt projection 32 in the extracted position of the oblique bolt and by guiding an external force on the counter surface 33, whereby the pushing projection 36 pushes the counter pushing surface 38 with the pushing surface, forcing the oblique bolt to move inwards towards the locking body, and the curved turning surface 39 turns in relation to the side of the recess until the support surface 34 of the bolt projection abuts against the other side 44 of the recess. I.e. the rotor can no longer rotate in this respect.

Fig. 2, 3 and 5 show the tilt bolt in a retracted position, in which the support surface 34 of the bolt projection of the rotary member 31B abuts the other side surface 44 of the recess. The counter surface 33 is in the plane of the inclined surface 10B of the tip portion. Depending on the configuration of the tip portion and the turning portion, the counter surface is substantially or exactly in the plane of the inclined surface. This implementation can also be such that the counterface surface is partly exactly in the plane of the inclined surface and is approximated for other parts thereof. The function of the oblique bolt in its different positions will be checked next.

The tilt bolt 5 is spring-loaded by a spring 43 towards the extracted position. In this case, the rotation projection 35 abuts against the support surface 40 on the back surface of the panel. When the tilt bolt has rolled towards the extracted position as supported by the roller 42, the turning piece turns in the recess 53B to the position of fig. 4, pushed against the pushing surface 38 and supported/turned by the support surface 40. As can be seen, the counter surface 33 of the rotor is out of the plane formed by the inclined surface, wherein the rotor forms a structure equivalent to a dead bolt. If the locking means 71 (fig. 7) of the lock is put into the locking position, the bolt cannot be pushed into the interior of the lock body.

When the blocking device 71 is not placed in the locking position, the tilt bolt can be moved into the interior of the lock body 2. When the door is opened, the striker plate in the door frame presses against the confronting surface 33 of the bolt projection. Due to this external force, the bolt projection of the rotation piece 31B is rotated in the recess 53B of the tip portion, whereby the counter surface is moved toward the inclined surface 10B, the curved rotation surface 39 of the pushing projection is rotated on the side 41 of the recess, and the pushing surface 37 of the pushing projection pushes the tilt bolt 5 against the force of the spring 43 to the inside of the lock body 2. The rotary member rotates until it has rotated so far that its support surface 34 is fully against the other side 44 of the recess. As can be seen, the turn piece pushes the tilt bolt inside the lock body while it turns in the recess. Only then, when the support surface of the turn piece is completely against the other side of the recess, the striker plate of the door frame presses in a direct manner against the pointed end portion of the oblique bolt, either directly in contact with or through the turn piece, wherein this function corresponds to the known oblique bolt, the pointed end portion being moved deeper into the lock body into the retracted position. The turning piece is thus no longer turned in the final stage, at which point the oblique bolt moves inwards into the lock body.

Because the tilt bolt is supported into the lock body by the roller 42 and the turn pieces 31A, 31B turn in the notches 53A, 53B, the wear experienced by these surfaces can be reduced and the movement of the tilt bolt is easier than before. When the side of the recess consists of two parts from the side 41 and the other side 44, the rolling of the rotor also consists of two parts, wherein the rolling distance is greater than that of the uniform rolling part. In the example of the figure, the oblique bolt 5 is thus arranged to rotate by an external force directed on the counter surface 33, initially on the curved rotating surface 39 of the pushing projection, which abuts against the side 41 of the recess, and thereafter on the support surface 34 of the bolt projection, until it has been completely rotated against the other side 44 of the recess. In the embodiment of the figure, the other end of the turning piece is turned on the support surface of the bolt projection, which end is the end on the side of the back 52 of the tip portion of the bolt. When the bolt piece is turned against the other side 44 of the recess, the end of the support surface 34 is slightly separated from the other side 44.

The pushing projection 36 of the rotary member 31A, 31B can include a nose 45, the other side of which is included as part of the pushing surface 37. In such an embodiment, the back of the tip portion has a back face 510 facing the counter-thrust surface 38, so that there is a gap 511 between the back face and the counter-thrust surface. The nose 45 is located in this gap, with the tilt bolt in the extracted position. The pushing projection 36 of the rotary member may also include another nose 512 at the end of the curved rotary surface 39. The other nose is directed towards the tip 51 of the tip portion, in the manner shown in the figures.

More functional reliability can be obtained in the tilt bolt, in which case a spring 513 is added for each turning piece. The spring dedicated to the turning piece is arranged to turn the bolt projection 32 towards the other side 44 of the recess. With the help of these springs the opposite turning piece also turns in both directions in the recess, at which time the striker plate presses against the turning piece on the other side and the oblique bolt 5 tries to move into the lock body.

It is possible to have the above-mentioned rollers 42 in, for example, grooves 11 formed on both sides of the oblique bolt, in which the rollers are located. In such an embodiment, the bolt hole 4 has protrusions 12 that extend into the grooves.

It is also possible to form an embodiment according to the example of the figures, in which the locking body 2 comprises, at the location of the oblique bolt 5, a body piece 310 against which the roller 42 is positioned. Said support surface 40 in the panel 3 for the turning projection 35 is also easy to arrange into the body piece. The use of body pieces can improve the assembly of the lock and ease the production of the lock. In addition, the roller properties of the roller can be better controlled. If the invention is not embodied with a body piece, the counter surface 40 is part of the back side of the panel (the surface facing the locking body 2) or possibly part of the inner surface of the locking body for a part of the locking body 2, which is bent against the panel 3. In the embodiment of the figure, the panel is formed of two parts, but it may also be formed of one part.

The tilt bolt arrangement given above is suitable for use in a lock body with or without a locking device. If a blocking means 71 is locked, as shown in fig. 7, the tilt bolt 5 can in this case further comprise a flexure element 46 and a support 47 in the back of the tip portion. In this case, the support has said counter-thrust surface 38. The support member is located between the flexure element 46 and the rotors 31A, 31B. The force introduced into the latching means 71 can be reduced using a flexing element and a support which can be moved relative to the rest of the tip portion 5A. In the embodiment of the figures, the flexing element is a coil spring. The oblique bolt can however also be embodied without a support and a deflection element, wherein the back 52 of the tip portion is the fixing portion of the remaining tip portion.

The construction of the tilt bolt according to the invention enables an easy movement of the tilt bolt, which reduces the need for lubrication. Thus, even the service interval of the lock can be increased. Thanks to these structures, the function is more reliable than in known solutions and the lock has a longer service life. The opening and closing force of the door transmitted from the striker supporting plate of the door frame to the tilt bolt is transmitted by the rotation of the rotating member in accordance with the linear movement of the tilt bolt. The turning piece thus rolls against the tip portion of the oblique bolt, wherein the friction is smaller than when the turning piece slides against the tip portion. The rotary member thus serves both as a force transmission means and as a support portion. The rollers on both sides of the tilt bolt also promote easy movement of the tilt bolt in a linear direction.

In light of the examples given above, it is clear that embodiments according to the invention can be obtained by many different solutions. The shape of the tip portion of the oblique bolt and the shape of the bolt piece can vary. It is obvious that the invention is not limited solely to the examples presented herein, but it can be implemented by many different embodiments within the scope of the independent claims.

Claims (11)

1. A door lock comprising a lock body (2) provided with a face plate (3), with a tilt bolt (5) which is moved to and fro in a linear movement through a bolt hole (4) in the face plate (3) between a retracted position and an extracted locking position out of the lock body, and which tilt bolt (5) is spring-loaded towards said extracted locking position, which tilt bolt comprises a tip portion (5A) and a body portion (5B), which tip portion is in said extracted locking position, partly outside the lock body (2), characterized in that the tip portion (5A) comprises a tilt surface (10A, 10B) on both sides, so that the tip (51) of the tip portion (5A) is narrower than the back (52) of the tip portion, the lower (55) and upper (54) portions of which tip portion have recesses (53A, 53B), which extend from the tip (51) to the back (52), which two recesses (53A, 53B) open on the end of the tip (51) of the tip part and on the inclined surfaces (10A, 10B) on both sides, whereby the recess (53A) of the upper part (54) opens on the inclined surface (10A) opposite to the recess (53B) of the lower part,

both recesses (53A, 53B) having a turning piece (31A, 31B) and a turning protrusion (35), the turning piece (31A, 31B) comprising a bolt protrusion (32) having on a first side thereof a counter surface (33) and on the other side a support surface (34), said turning protrusion (35) being arranged to turn the turning piece (31A, 31B) when the oblique bolt (5) is moved from the retracted position to the extracted locking position, such that the turning protrusion (35) is brought against the support surface (40) inside the panel (3) and such that the counter surface (33) is brought away from the inclined surface (10A, 10B) of the tip portion, the turning piece further comprising a pushing protrusion (36) having a pushing surface (37) towards the counter pushing surface (38) of the back of the recess (53A, 53B) and a curved turning surface (39) towards the side surface (41) of the recess,

and the locking body (2) has rollers on both sides of the oblique bolt (5), between the sides (2A, 2B) of the locking body and the sides of the oblique bolt,

the turning piece (31A, 31B) is arranged to turn outwards from the inclined surface (10A, 10B) together with the bolt projection (32) in the extracted locking position of the tilt bolt and by an external force directed on the counter surface (33), whereby the pushing projection (36) pushes the counter pushing surface (38) with the pushing surface (37) causing the tilt bolt (5) to move inwards towards the lock body (2) and the curved turning surface (39) turns in relation to the side of the recess until the support surface (34) of the bolt projection abuts the other side (44) of the recess.

2. A door lock according to claim 1, characterized in that the pushing projection (36) of the turning piece (31A, 31B) comprises a nose (45) whose side comprises a part of said pushing surface (37), and the back (52) of the tip portion has a back face (510) facing the counter-pushing surface (38), so that there is a gap (511) between the back face and the counter-pushing surface, in which gap the nose (45) is located, when the oblique bolt (5) is in the extracted locking position.

3. A door lock according to claim 2, characterized in that the pushing projection (36) of the turning piece (31A, 31B) comprises a further nose (512) at the end of the curved turning surface (39) facing the tip (51) of the tip part.

4. A door lock according to any one of claims 1-3, characterized in that the oblique bolt (5) comprises a spring (513) for each turning piece (31A, 31B), the spring dedicated to the turning piece being arranged to turn the bolt projection (32) towards the other side (44) of the recess.

5. A door lock according to any one of claims 1-3, characterized in that the oblique bolt (5) is arranged to turn by an external force directed on the counter surface (33), initially on the curved turning surface (39) of the pushing projection (36), which abuts against said side (41) of the recess, and thereafter on the support surface (34) of the bolt projection, until it has turned completely against the other side (44) of the recess (53A, 53B).

6. A door lock according to any one of claims 1-3, characterized in that the support surface (34) of the bolt projection (32) is against the other side surface (44) of the recess by an external force directed on the counter surface (33), the counter surface (33) being in the plane of the inclined surface (10A, 10B) of the tip part.

7. A door lock according to any one of claims 1-3, characterized in that there are recesses (11) on both sides of the oblique bolt (5), in which the rollers (42) are located, and the bolt hole (4) has a projection (12) which extends into the recess.

8. A door lock according to claim 7, characterized in that the lock body (2) comprises, at the location of the oblique bolt (5), a body piece (310) against which the roller (42) is positioned and which has said support surface (40) in the panel (3) for the turning projection (35).

9. A door lock according to any one of claims 1 to 3, characterized in that the confronting surface (33) of the bolt projection (32) of the turning piece (31A, 31B) comprises a portion which is wider than the other portion of the turning piece (31A, 31B).

10. A door lock according to claim 9, characterized in that the lock body (2) comprises a blocking device (71).

11. A door lock according to claim 10, characterized in that the back (52) of the tip portion has a flexing element (46) and a support (47) having said counter-thrust surface (38) and located between the flexing element (46) and the turning piece (31A, 31B).