DE1014875B - Security lock, especially combination lock - Google Patents

Description

The invention relates in particular to a combination lock trained safety lock with several seated on the same axis against each other rotatable Locking disks, which each have a groove on their circumference, which when the locking disks are set all adopt the same radial position according to the opening secret, in which then a lock bolt actuating, at the other end articulated with it Can engage lever with a tactile bar.

Such security devices working with numerical setting or combination locks, which are mostly used in safe construction, are inherently in different embodiments already known. They all have the disadvantage that the locking washers do not automatically adjust again when the lock bolt is closed. One can therefore see the castle open again with one of these versions without having to reset the opening secret, if Do not make a full turn of the adjusting knob after closing the lock becomes what can be forgotten. For this reason, such a lock meets the requirements of a security lock is not satisfactory in terms of its reliability.

Another known embodiment of such a lock works so that the open position of the Lock washers only when you try to open the lock again, is smeared. This also does not satisfy because the adjustment of the locking disks depends on the closed position of the lock and because the construction required for this also requires special structural means that the Make the lock more expensive and more susceptible to failure.

In a further known construction, the locking disks are scanned with axial displacement the adjustment knob, which is more cumbersome and also a greater structural effort demands.

In contrast, the invention is based on the object of creating a safety lock, and in particular a combination lock, in which the smearing of the setting secret that enables the lock to be opened has already taken place automatically before the lock bolt assumes its closed position, so that the locking disks already exist even if the lock bolt is not fully advanced are brought back into the locked position. It is also important to achieve this with structural means that are particularly simple and cheap. The solution to this problem is achieved in that, according to the invention, those parts which the drop lever with its feeler bar when closing the lock on the safety stop passing out of the grooves of the safety lock,
especially combination lock

Applicant:

Theodor Kromer

Special factory for security locks,

Limited partnership,
Freiburg (Breisgau), Lehener Str.40a

Otto Sellin, Freiburg (Breisgau),
has been named as the inventor

Allow disks to be lifted out, so ¹ are designed that this lift-out has taken place before the lock bolt assumes its closed position. The drop lever and the locking disks then carry out a mutual adjustment movement that obscures the opening secret until the lock bolt has reached its closed position.

For this purpose, two different embodiments are preferred. According to the one Execution will include the earliest possible lifting of the drop lever from the grooves of the locking washers Passing this drop lever on the safety stop of the lock, as this according to the Invention is required, brought about by the fact that the front part of the drop lever is unstable with the remaining part of this lever is connected, so that this part of the lever when lifting out of the grooves the locking washers can give way down if it hits the safety stop.

According to the other embodiment according to the invention, the early excavation of the Falling lever on the safety stop by allowing this safety stop as soon as the Incident lever hits him from below, can deflect resiliently upwards.

The invention with its further details is given below with reference to drawings in the named two embodiments, for example, described in more detail.

709 659/70

Fig. 1 to 4 show that embodiment of the number lock in different working positions, in which the front part of the drop lever is non-rigidly connected to the rear part of this lever is, and in detail it shows:

Fig. 1 dkses lock seen from the inside with the rear wall removed and open .Position, ;. / ..- _

Fig. 2 the intermediate position of the lock when it is closed, in which the front part of the drop lever slides flexibly downwards past the safety stop,

Fig. 3 the lock in the closed position, Fig. 4 the lock in its closed position, Seen from above, with the upper cover removed.

Fig. 5 to 8 illustrate that embodiment of the lock, in which its safety stop for sliding past the front part of the Incident lever when closing the lock bolt can deflect resiliently upwards. The im individual again:

Fig. 5 of the open position of the lock analogous to Fig. 1,

Fig. 6 of the intermediate position of the lock when the lock bolt is closed, in which the safety stop is resiliently pushed upwards by the drop lever,

Fig. 7 the lock in its closed position and

Fig. 8 the view of the lock from above analogous to Fig. 4.

In the figures, 1 is the drop lever of the lock, the grip strip 2 of which is in the matching Positioned grooves 3 of the locking disks 4 can fall as soon as these locking disks 4 in known Way are set so that it corresponds to the key number for opening the combination lock. In In this case, the lock bolt 5 can be withdrawn from the lever 1 as soon as the setting button is pressed 6 of the lock is turned back in the sense of the opening movement of the lock bolt. This position is shown in Fig. 1.

To close the lock bolt 5, the adjusting knob 6 is rotated in the direction of the closing movement of the lock bolt. This bolt 5 is pushed to the right by the driver 7 of the lock. At the same time, the drop lever 1 is lifted up out of the grooves 3 by the lifting cam 8. This should be done as early as possible before the lock bolt 5 assumes its closed position. So that this can happen without the security provided on the lock housing 9 from hindering the drop lever 1, the front part 1 α of this lever is fixedly attached to the rear part of the drop lever 1 by means of a leaf spring 11. The front lever part 1 α can therefore yield in a downward bend and thus slide past the safety stop 10 (see Fig. 2).

This ensures that the raised drop lever 1 is already a significant piece compared to the grooves 3 moved when the lock bolt has reached its closed position (see Fig. 3). This mutual adjustment movement between sash levers 1 and locking disks 4 when closing the lock bolt 5 then causes an adjustment at the same time the open position of the locking disks 4 and thus, as desired, obliterates the opening secret, even before the lock bolt 5 is closed. The drop lever 1 is then in the closed position of the Latch 5 also immediately with its front face 12 on the safety stop 10 and thus secures the Lock bolt against pushing back.

In the exemplary embodiment according to FIGS. 5 to 8, the drop lever 1 must be lifted out as early as possible from the grooves 3 of the locking disks 4 past the safety stop 13 achieved in that this Safety stop in this case can move upwards, with the front part of the drop lever 1 is now rigidly attached to this lever. The safety stop 13 is used for this purpose provided with an upwardly pointing pin 14 on which a helical spring 15 is placed, which rests on a plate approach 16 below. These parts are in a small socket-shaped attachment 17 housed, which is screwed onto the lock housing 9. The pin 14 engages while in a bore 16 in the cover of the attachment 17 and can thus under compression of the spring 15 give way upwards together with the safety stop when these parts are pushed through the drop lever upwards, as shown in Fig. 6. In this way, the lever of attack 1 are raised early and emerge from the grooves 3 without the safety stop 13 preventing this. The drop lever 1 becomes then, in the direction of the closing movement, the lock bolt 5 dragged along by this, to the right far a: - moved, this movement being caused by the driver 7 comes about. In the closed position of the lock according to Fig. 7, the drop lever 1 also finds itself its end face 12 on the safety stop 13 pushed back by the spring 15 be the lock bolt abutment securing against pushing back.

Claims (3)

Patent claims: 1.Safety lock (combination lock) with several mutually rotatable locking disks on the same axis, each of which has a groove on its circumference, which when the locking disks are set according to the opening secret all consistently assume the same radial position, in which one then actuates the lock bolt on the other The end of the hinged drop lever connected to it can engage with a feeler bar, characterized in that the means that the catch lever (1) with its feeler bar when closing the lock, past the safety stop (3), ^ λβ the grooves of the locking disks (2) to Let excavation come, are designed so that this excavation is done before the lock bolt assumes its closed position, and that the engagement lever and the locking disks until then still experience a mutual adjustment movement that obliterates the opening secret. 2. Safety lock according to claim 1, characterized in that the front end of the drop lever (1), which carries the feeler bar, with the part of this lever leading to the lock bolt in this way Is connected non-rigidly that this front lever part when he is out of the grooves of the locking disks (2) the lifting of the drop lever (1) hits the safety stop (3) from below, evasive downwards can give way by the two mentioned parts of the drop lever z. B. with each other by a leaf spring are connected. lull 3. Safety lock according to claim 1, characterized in that the safety stop (3) for the drop lever (1), e.g. B. held in position pressed by a spring from above, such is attached to the lock housing unsteadily that he, going up, can dodge when the Incident lever hits against him from below when he is lifted out of the grooves in the locking disks. Documents considered: German Patent No. 499 892; German utility model No. 1 684 798. 1 sheet of drawings