WO2009014428A1

WO2009014428A1 - Bolt housing comprising a bolt, and a bolt module

Info

Publication number: WO2009014428A1
Application number: PCT/NL2008/000182
Authority: WO
Inventors: Edwin Bunschoten
Original assignee: Nemef B.V.
Priority date: 2007-07-23
Filing date: 2008-07-23
Publication date: 2009-01-29
Also published as: EP2171186A1; NL1034174C2

Abstract

The invention relates to a bolt housing having a bolt module, wherein, briefly said, - the bolt module comprises a bolt that can rotate around an axis, - the bolt module is movably mounted in the bolt housing between a first terminal position of the bolt module wherein the bolt is brought maximally outside the bolt housing and a second terminal position of the bolt module wherein the bolt is brought maximally in the bolt housing, and - the bolt that is rotatable around the axis is in the absence of a force exerted on the part of the bolt that protrudes outside the frame in a position of rest situated between the first terminal position of the bolt and the second terminal position of the bolt, and an organ exerts a force on the bolt in the direction of that position of rest. The invention also relates to a bolt module.

Description

Bolt housing comprising a bolt, and a bolt module

The present invention relates to a bolt housing comprising a bolt. For readily opening and closing doors and windows and the like, it is known to provide these with a rolling bolt. For the sake of simplicity of the description, hereinafter reference will be made to doors only; however, the invention is by no means restricted to that application. The same goes for the arrangement of the bolt. This can be mounted at choice in a static part, such as the post of a frame, or in a movable part, such as a door. For the sake of simplicity of the description, only the arrangement of the bolt in a movable part in the form of a door will be discussed, however, the invention is by no means restricted to that application. A rolling bolt is a cylindrical or barrel-shaped bolt that is pushed outward (i.e. partially out of the bolt housing) by a spring or the like. However, the bolt housing does arrest the bolt, that is, holds it in a terminal (protruding) position. When the door is closed, the rolling bolt comes into contact with the doorpost and is pushed into the bolt housing (causing the spring to be compressed) . When the rolling bolt reaches a recess provided therefore in the door post, the spring pushes the rolling bolt in the recess, as a result of which the door is maintained in a closed position.

Rolling bolts have a number of attractive advantages. It is, for example, possible to open the door by simply pushing against^; the door without using a door handle, or by just pulling the door handle (without any need to further move the door handle, for instance downward) . Furthermore, rolling bolts are suitable for both left and right doors without modification. However, rolling bolts also have a couple of drawbacks which limit their possibilities for application. For example, rolling bolts are not really capable of holding a door reliably, as a result of which a door may open at an undesired moment, for instance, due to draught or wind. Further, the arrangement of the recess with respect to the rolling bolt requires fairly great precision, on pain of a rattling door. Finally, a rolling bolt has only a limited capability to completely close a door that has been nearly slammed shut. It is an object of the present invention to provide an alternative bolt, which eliminates said disadvantages to a large extent.

To this end the invention provides a bolt housing having a bolt module, wherein - the bolt module comprises a frame for holding a bolt that is rotatable around an axis, the frame has a first end and a second end, and the axis is located near the first end of the frame,

- the bolt of the bolt module has a distal end at an end of the bolt that is facing away from the second end of the frame, which distal end protrudes outside the frame,

- the bolt module is movably mounted in the bolt housing between a first terminal position of the bolt module wherein the bolt is brought maximally outside the bolt housing and a second terminal position of the bolt module wherein the bolt is brought maximally in the bolt housing,

- the bolt housing has a first organ for exerting a force on the bolt module in a direction from the second terminal position of the bolt module towards the first terminal position of the bolt module, and - the bolt that is rotatable around the axis

- is rotatable between a first terminal position of the bolt and a second terminal position of the bolt, and

- is - in the absence of a force exerted on the part of the bolt that protrudes outside the frame - in a position of rest situated between the first terminal position of the bolt and the second terminal position of the bolt, and a second organ exerts, in the presence of a force exerted on the part of the bolt that protrudes outside the frame - as a result of which the bolt is not in the position of rest - a force on the bolt in the direction of that position of rest.

A bolt housing provided with such a bolt module has a number of important advantages in comparison with a rolling bolt. Firstly, the bolt is better capable of pulling an almost closed door shut and also to keep it closed. Secondly, the arrangement of the bolt rela- tive to the strike box requires less precision. These advantages can be obtained without affecting the advantages of the rolling bolt that are already known. The term "frame" in connection with the bolt module is not limiting and may for instance be a frame built of rods or be a rectangular U-profile. The requirements for the frame are that it has to be capable to withstand any forces exerted thereupon and to perform the described functions. In general, the distal end of the bolt will protrude outside the frame for at least 50%, such as at least 55%, of the distance of the distal end of the bolt to the axis. When the phrase "protrude outside the frame" is used, this means protrude beyond the terminal part of the frame in a direction from the second end of the frame towards the first end of the frame. The term "axis" in connection with bolt is understood to be a rotational axis and may be, but does not have to be, a physical axle in the form of a pin or the like. When mention is made that the position of rest is situated between the first terminal position of the bolt and the second terminal position of the bolt, this includes these terminal positions. According to a possible embodiment, the bolt is in the posi- tion of rest in 1 of the terminal positions of the bolt. When closing a door, the bolt in such a bolt housing can behave like a conventional bolt, and while the bolt will maximally resist against opening the door it will, however, allow this. Instead of the term position of rest, in this application the term base position is also used. The bolt housing comprising a bolt according to the invention offers a combination of advantages in comparison with the bolt housing comprising a bolt as known from GB2203794. For example, the door is less prone to rattling, and for a smooth operation the bolt does not have to be composed of separate bolt halves. In addition, it is less likely to be blown open by the wind and the bolt housing is quite capable of pulling a door shut, even in the presence of a counteracting element in the frame or door, such as a draught excluding strip made of resilient material. When used in a door that can open to either side, the bolt does not have to be composed of two bolt halves. Con- sequently, the bolt housing comprising a bolt according to the invention can be applied more universally.

Preferably, the bolt module is movably mounted in the bolt housing in such a way that the bolt module can move over a distance of at least 60%, preferably at least 75% of the distance from the distal end of the bolt to the axis.

Thus, the bolt can also be used when there is little distance between the door and the door post. In other words, with this embodiment the arrangement of the door and the door post is hardly criti- cal, which is a major advantage in comparison to known rolling bolts. In practice, the distance between the door and the door post may vary, for instance as a result of changes in temperature and air humidity and tolerances. With the known rolling bolts this easily leads to poor closure and poor retention of the door for part of the year. With regard to this aspect a bolt housing according to the invention does perform better.

According to a preferred embodiment the position of rest is different from the first terminal position of the bolt and the second terminal position of the bolt and the second organ is a centring organ. More preferably this position of rest is situated halfway (plus or minus 5°) between the first terminal position of the bolt and the second terminal position of the bolt.

Such a bolt will behave more symmetrically and thus can pull a door shut in two directions. The centring organ may, for instance, be a wound spring in which case the centring organ in general will consist of 1 component. The centring organ may, however, also consist of more than one, for instance two components which do not necessarily have to be in contact, wherein the components may exert a force on the bolt in opposite directions. US3951442 discloses a bolt housing comprising a bolt, wherein the bolt is maintained in a central position. In comparison with a rolling bolt, this bolt is able to protrude a little further, but not as much as is possible with the bolt of the bolt housing according to the present invention. According to a preferred embodiment, the frame is provided with a wound spring as the centring organ, wherein the wound spring has a first protruding wire end and a second protruding wire end, the first protruding wire end exerts a force on the bolt that brings the bolt towards the first terminal position of the bolt, and the second protruding wire end exerts a force on the bolt that brings the bolt towards the second terminal position of the bolt.

Thus, in a simple manner, an effective centring organ can be provided. A wound spring as described above may be referred to as a partially wound spring. Thereby the wound portion of the spring forms the body of the spring. The term "towards" means, "in the direction of".

According to a preferred embodiment thereof, between the body of the wound spring and the bolt a first abutment for the first pro- truding wire end and a second abutment for the second protruding wire end are provided, wherein the first abutment can act as abutment when the second wire end exerts a larger force on the bolt than the first wire end, and the second abutment can act as abutment when the first wire end exerts a larger force on the bolt than the second wire end.

Thus, it can be achieved that the door can be pulled shut by the bolt using a greater force, and is opened (even) less likely at an undesired moment (for instance, by the wind) . In practice, the abutments will be part of the bolt module. An important embodiment is characterized in that the bolt housing and the bolt are arranged to engage at both sides of the bolt.

To this end the bolt housing may be provided with a front plate having an opening for the bolt. The opening in the front plate through which the bolt can protrude may be provided with a cam at both sides of the bolt, whereas the bolt itself at both sides thereof is provided with grooves that are complementary to the cams. Each of the grooves (at least, insofar as those grooves serve the purpose described below) has a groove end at a location away from the distal end of the bolt, which groove end acts as an abutment for a cam of the front plate. Preferably, these groove ends are on a line substantially perpendicular to the line between the distal end and the axis. In an alternative embodiment the bolt is at both sides thereof provided with cams which engage the housing, for instance on the side edges of the opening for the bolt, at both sides of the bolt. Preferably, these cams are on a line substantially perpendicular to the line between the distal end and the axis. In each of these cases the described arrangement accomplishes that a well-defined position of rest of the bolt is achieved in the first terminal position of the bolt module, which position of rest is preferably halfway between the first and the second terminal angular position of the bolt. Consequently, slight differences of the force with which the centring organ pushes from the first position of the bolt towards the position of rest and from the second position of the bolt towards the position of rest have no effect on the orientation of the bolt in the position of rest. This facilitates the production and mounting of the bolt housing according to the invention. The organ that pushes the bolt module towards the first terminal position of the bolt module also provides a pre-stress force, as a result of which also in situations where there is a great distance between the door and the doorpost, the door can still be well retained. Not in the least, this embodiment offers yet another attractive advantage. As soon as an external force is exerted on the bolt, as a result of which it is not in the position of rest, the bolt will immediately be pushed inward in order to be able to rotate around the axis. So, the rotation of the bolt is directly accompanied by a translation of the bolt module. As will be clear to a person of ordinary skill in the art, the expression "at both sides" means at both sides of a plane defined by the direction in which the bolt module can move and the axis around which the bolt can rotate.

According to a commercially important embodiment the bolt housing is in addition provided with a dead bolt. This allows to permanently secure the door until a later point in time, if so desired.

According to a very favourable embodiment, in a plane transverse to the axis over at least part of the length between the axis and the distal end of the bolt, the bolt has a profile that tapers towards the distal end of the bolt.

The use of a tapered profile, . which does not have to extend up to the terminal distal end in order to be effective, further enhances the proper and smooth functioning of the bolt housing comprising a bolt according to the invention during use. In the present applica- tion, the term "tapered" is not limited with respect to how this takes place. That is to say, the side faces of the bolt may be, for instance, cylindrically curved planes (thus, exhibit a convex curve) instead of flat planes, the distal end itself can be round, etc. However, the distance between the distal end and the axis in a plane perpendicular to the axis, is greater than the largest half width of the bolt perpendicular to the line between the distal end and the axis. The distance is, for instance, at least 25% larger, preferably at least 50% larger and most preferably at least 100% larger, e.g. 120%. The invention also relates to a bolt module suitable for a bolt housing, wherein the bolt module is as described for the bolt housing according to the invention. Such a bolt module can be used for the assembly of modularly composed bolt housings.

The present invention will now be illustrated with reference to the drawings, where: Fig. 1 shows a diagrammatic cross-sectional view through a post of a frame and a door provided with a bolt housing comprising a bolt according to the invention, showing in four stages how the bolt is pushed inward and finally engages a cavity in the post, during the closing of the door; Fig. 2a shows a side view of the bolt housing according to the invention;

Fig. 2b shows a perspective view of part of the bolt housing of fig. 2a;

Fig. 3a shows an explosion view of fig. 2a, whereas fig. 3b and 3c respectively show, enlarged, a frame and a bolt of fig. 3a;

Fig. 4a and 4b represent bottom views of a detail of a bolt module of fig. 1;

Fig. 5a-c show how a bolt of a bolt module according to the invention is centred; Fig. 6 shows an alternative bolt housing, suitable for operating using a handle; and

Fig. 7 shows a diagrammatic cross-sectional view through a post of a frame and a door provided with an alternative bolt housing having a flat bolt, showing in four stages how the flat bolt is pushed inward and finally engages a cavity in the post, while closing the door.

In order to explain the invention in the simplest possible way, now first the movement made by a bolt in a bolt housing according to the invention will be described. Next, there will be a de- scription of what the bolt housing exactly looks like.

Fig. 1 diagrammatically shows a cross-sectional view through a post K of a door frame and part of a door D near the bolt 5, in four different stages (a-d) of the closing of the door D.

In fig. Ia the door D is closed and the bolt 5 comes into con- tact with post K with contacting face 23. As a result, the bolt 5 rotates around an axis 4 (fig. Ib) . The force exerted by the post on the contacting face 23 forces the bolt 5 from a position in which the bolt 5 maximally protrudes from the door, towards a position in which it is more retracted in the door (fig. Ic) . Next, the distal end 8 of the bolt 5 is in contact with the post K of the door frame. As soon as the distal end 8 reaches a recess U in the post K the distal end 8 of the bolt 5 will be received in the recess U, for instance, a strike box (fig. Id) . The recess U and the bolt 5 will be designed and arranged relatively to each other such, that the bolt 5 in a closed position of the door D exerts a force on part of the edge or wall of the recess U, as a result of which the door D will not rattle. The bolt 5 of the embodiment disclosed here had the following dimensions: the distance between the distal end 8 and the axis 4 was 13,6 mm, whereas the thickness of the bolt perpendicular to the line between the distal end 8 and the axis 4 in a plane perpendicular to the axis 4 was 12,4 mm. Fig. 2 shows a cut-away bolt housing 1 as used in the door D of fig. 1, wherein fig. 2a is a side view and fig. 2b part thereof in perspective view. Fig. 3 shows an explosion view from substantially the same perspective as fig. 2b. The bolt housing 1 comprises a lock plate 24 and a front plate 11. The front plate 11 is provided with an opening 26 (fig. 3a) for the bolt 5. The bolt 5 is part of a bolt module 2. The bolt module 2 comprises a frame 3 and is arranged to rotatably hold the bolt 5. The bolt 5 is rotatable around axis 4. This axis 4 is located near the first end 6 of the frame 3, whereas the other end of the frame 3 is the second end 7 thereof. The bolt module 2 is movably incorporated in the bolt housing 1 between a first terminal position wherein the bolt 5 is brought maximally outside the bolt housing 1 (fig. Ia) and a second terminal position wherein the bolt 5 is maximally (but not completely) received in the bolt housing 1 (fig. Ic) . To this end guiding means are provided, in particular a pin 27 and a slot 28. The bolt housing 1 is provided with an organ for exerting a force on the bolt module 2 from the second terminal position towards the first terminal position (so, in fig. 2a to the left) . In the embodiment shown, a latch bolt spring 9 engaging a recess 31 in the frame 3 is used (fig. 2b), but instead of a spring, for instance, a pneumatic organ such as currently available on the market could also be used.

The bolt 5 is rotatable around axis 4 between a first terminal position of the bolt 5 (corresponding to the situation as shown in fig. Ib) and a second terminal position (corresponding to the position the bolt 5 will assume when the door D is pulled open when the door is in the closed position of fig. Id) . When no external forces are exerted on the bolt 5 (such as by a post K of the frame), it will be in a base position or position of rest, located between the first terminal position of the bolt 5 and the second terminal position of the bolt 5, preferably halfway. In this position the distal end 8 will protrude maximally through the opening 26 in the front plate 11 out of the bolt housing 1 (fig. Ia) . Now it will be set forth how the bolt in the embodiment discussed is brought in the position of rest, however, the invention is by no means restricted to this particular embodiment .

For passing the bolt 5 from the first terminal position of the bolt 5, or from the second terminal position of the bolt 5, towards the base position of the bolt 5, a spring 10 is provided, which spring has a wound body 29 and is held in place by a pin 19 in the frame 3 of the bolt module 2. The spring 10 has two wire ends 15a, 15b (fig. 3) which engage the bolt 5. This is visible in fig. 4a, 4b, which are detail images of the bolt housing of fig. 2a, and in par- ticular are diagrammatic bottom views from two different heights through the bolt module 2. The bolt 5 has recesses 17a, 17b at the part of the bolt 5 facing the second end 7 of the frame 3. In order to perform an operative spring action, spring 10 could have been secured, i.e. have been mounted non-rotatably around pin 19. The em- bodiment discussed here presents a more effective solution. The use of abutments 16a, 16b, here afforded by a plate 30 provided with through slots 25a, 25b, may accomplish that near the second terminal position of the bolt 5, only the wire end 15b exerts a force on the bolt 5, whereas the wire end 15a rests against plate 30, in particu- lar abutment 16a. The opposite applies for the first terminal position of the bolt 5. This is visible in fig. 5a-c. In fig. 5a the wire end 15b engages the bolt 5. Here, the slot 25b is illustrated cutaway, showing the wire end 15b over its full length. Upon moving towards the base position of the bolt 5, the wire end 15b moves in the slot 25b. When the bolt 5 moves from the second terminal position of the bolt 5 to beyond the base position (as shown in fig. 5b) , an end of the slot 25b will act as an abutment 16b for the wire end 15b. This is clearly visible in fig. 5c, where it can be seen that the wire end 15b is located freely (i.e. not resting against bolt 5) in the recess 17a, wherein the bolt 5 is in the first terminal position of the bolt 5. In fact, the wire end 15b already does not rest against the bolt 5 between the base position and the first terminal position of the bolt 5. The locations of the abutments 16a, 16b for the wire ends 15a, 15b will substantially be located in the continuation of the line between the distal end 8 of the bolt 5 and the axis 4 (as shown in fig. 3b), but the ordinary person skilled in the art can somewhat vary the location, not only to take into account the thickness of the wire ends 15a, 15b, but also to adjust as desired the behaviour of the bolt 5 with the envisioned application of the bolt housing 1. If so desired, the location of the abutment can be adjustable, for instance by means of a small screw or the like.

In principle, a spring 10 may, in the absence of an external force on the bolt 5, cause the bolt 5 to be in the base position. The use of abutments 16a, 16b, as explained above, can achieve that this is accomplished more easily. However, in order to provide in a simple manner a bolt housing according to the invention, wherein the bolt is in a desired base position without being sensitive to tolerances of material and mounting, it is preferred to have the base position dictated by the bolt housing. For the embodiment discussed here, the base position is dictated by the front plate 11. In the embodiment shown, the front plate 11 is provided with cams 12a, 12b (fig. 3a), whereas the bolt 5 is provided with complementary grooves 13a, 13b (fig- 3c) . These grooves 13a, 13b each have - at the second end 7 that is nearest to the second end of the frame 3 - an end, which groove ends 14a, 14b act as abutment for the cams 12a, 12b. In the absence of an external force on the bolt 5, the latch bolt spring 9 forces the bolt 5 outward, as a result of which the cams 12a, 12b will engage the groove ends 14a, 14b which act as abutment. Because of this, the position of the bolt 5 is determined by the location of the cams 12a, 12b and the groove ends 14a, 14b. Manufacturing the bolt 5 as a casting, allows precise and reproducible location of the groove ends 14a, 14b. The front plate 11 will usually be manufactured by means of punching or the like, as a result of which the precise and reproducible location of the cams 12a, 12b is also ascertained. Thus, a bolt housing 1 can be provided comprising a bolt 5 that has a well-defined base position. The cams 12a, 12b provide yet another advantage. When an external force is exerted on the bolt 5, the bolt 5 will immediately be pushed inward in order to be able to rotate around axis 4.

Although a handle is superfluous, and optionally a grip that is not movable relative to the door may suffice to pull the door open, the present invention does not exclude the use of a handle for bringing the bolt into the door. A handle can be useful when it is, for instance, desired to enter a room making as little noise as possible or to gently open or close a cabinet. Fig. 6 shows a variation of the embodiment shown in fig. 2, wherein a tumbler 20 known per se is provided which engages the frame 3 in a manner known per se. In order to have the handle (not represented) re-assume its original position, a spring 21 known per se is provided, all of which requires no further elucidation to the person of ordinary skill in the art. Fig. 7 shows a diagrammatic cross-sectional view that essentially corresponds to that of fig. 1. The difference is that here instead of a bolt 5 having a tapered part, a bolt 50 is used which, at the side of the post K, essentially has the shape of a flat plate. Such an embodiment is, however, not preferred compared to a tapered design of the bolt - for instance such as the one discussed above - since, in order to be still effective the bolt 50 has to protrude to a lesser extent. With a flat bolt 50 the terminal positions of the bolt become critical, since the bolt is not allowed to get jammed between the opening in the front plate and the post of the frame. With a tapered bolt, jamming does not exclude exertion of a force on the bolt module, causing the bolt to be at least partially received in the lock housing. Nevertheless, for optimal functioning, for a tapered bolt also it is preferred that jamming does not occur. In order to prevent jamming, as a rule of thumb can be taken that no point of the bolt in a terminal position thereof protrudes beyond a line which line is located in a plane perpendicular to the axis and on the same height as the particular point of the bolt in the plane, wherein the line touches the opening and is parallel to the direction of travel of the bolt module. It lies, however, well within the capability of the person of ordinary skill in the art to manufacture a functionally working bolt housing, wherein the person of ordinary skill in the art may, for instance, lower the resilience of spring 9, to ensure that the bolt is received in the housing with little enough effort that jamming is avoided. Other variables are, for instance, the angle at which a force is exerted against the contacting face of the protruding part of the bolt, wherein the person of ordinary skill in the art will take care that this angle will be preferably between 30° and 60°, and consider the friction characteristics of the materials used. However, this does not really differ from the situation where a prior art bolt is pushed in the bolt housing.

It is emphasized that a bolt housing according to the invention may also be mounted in a static part such as the post of a frame. In this case the bolt will be allowed to fall into a recess of a movable complementary part such as a door or sliding wall which is brought in front of the bolt by means of rotation and/or a translation. In case of a translation also, the bolt module will substantially be transverse to the direction of travel of the complementary part.

A bolt housing according to the invention may also comprise a dead bolt for the locking of a door or the like.

Claims

C L A I M S

1. Bolt housing (1) comprising a bolt module (2), wherein - the bolt module (2) comprises a frame (3) for holding a bolt (5) that is rotatable around an axis (4), the frame (3) has a first end (6) and a second end (7), and the axis (4) is located near the first end (6) of the frame (3),

- the bolt (5) of the bolt module (2) has a distal end (8) at an end of the bolt (5) which is facing away from the second end (7) of the frame (3), which distal end (8) protrudes outside the frame (3),

- the bolt module (2) is movably mounted in the bolt housing

(1) between a first terminal position of the bolt module (2) wherein the bolt (5) is brought maximally outside the bolt housing (1) and a second terminal position of the bolt module (2) wherein the bolt (5) is brought maximally in the bolt housing (1),

- the bolt housing (1) has a first organ for exerting a force on the bolt module (2) in a direction from the second terminal posi- tion of the bolt module (2) towards the first terminal position of the bolt module (2), and

- the bolt (5) that is rotatable around the axis (4)

- is rotatable between a first terminal position of the bolt (5) and a second terminal position of the bolt (5), and - is - in the absence of a force exerted on the part of the bolt (5) that protrudes outside the frame (3) - in a position of rest situated between the first terminal position of the bolt (5) and the second terminal position of the bolt (5), and a second organ (10) exerts, in the presence of a force exerted on the part of the bolt (5) that protrudes outside the frame (3) - as a result of which the bolt (5) is not in the position of rest - a force on the bolt (5) in the direction of that position of rest.

2. Bolt housing according to claim 2, wherein the bolt module

(2) is movably mounted in the bolt housing (1) in such a way that the bolt module (2) can move over a distance of at least 60%, preferably at least 75% of the distance from the distal end (8) of the bolt (5) to the axis (4) .

3. Bolt housing according to claim 1, wherein the position of rest is different from the first terminal position of the bolt (5) and the second terminal position of the bolt (5) and the second organ (10) is a centring organ.

4. Bolt housing according to claim 3, wherein the frame (3) is provided with a wound spring as the centring organ, wherein the wound spring has a first protruding wire end (15b) and a second protruding wire end (15a), the first protruding wire end (15b) exerts a force on the bolt (5) that brings the bolt (5) towards the first terminal position of the bolt (5) , and the second protruding wire end (15a) ex- erts a force on the bolt (5) that brings the bolt (5) towards the second terminal position of the bolt (5) .

5. Bolt housing according to claim 4, wherein between the body of the wound spring and the bolt (5) a first abutment (16a) for the first protruding wire end (15a) and a second abutment (16b) for the second protruding wire end (15b) are provided, wherein the first abutment (16a) can act as abutment when the second wire end (15b) exerts a larger force on the bolt (5) than the first wire end (15a) , and the second abutment (16a) can act as abutment when the first wire end (15a) exerts a larger force on the bolt (5) than the second wire end (15b) .

6. Bolt housing according to any of the claims 3 to 5, wherein the bolt housing (1) and the bolt (5) are arranged to engage at both sides of the bolt (5) .

7. Bolt housing according to any of the preceding claims, wherein the bolt housing (1) moreover is provided with a dead bolt

(5) .

8. Bolt housing according to any of the preceding claims, wherein in a plane transverse to the axis (4) over at least part of the length between the axis (4) and the distal end of the bolt (5), the bolt (5) has a profile that tapers towards the distal end of the bolt (5) .

9. Bolt module suitable for a bolt housing (1), wherein the bolt mod^¬ ule (2) is as described for the bolt housing (1) according to any of the claims 1 to 8.