Cylinder Lock

Abstract

A cylinder lock which comprises a key to be inserted into a key slot of a core and arranging tumblers with cavities provided with wide faces of the key. A housing has a flange projecting radially to the core. At least two rows of non-rotatable tumbler pins are arranged in the flange and sit set-off to each other due to a non-round cross-section and uniform bearing bore. One of the wide faces of the key slot is pointing in symmetric cross position towards the flange. The tumbler pins have a cylindrical jacket face, and the latter leads tangentially into two abutting planes at an edge pointing towards the longitudinal center plane of said flange, and one of said planes extending crosswise to the longitudinal direction of said flange and the other of said planes extending in the longitudinal direction of said flange.

Description

The present invention relates to a cylinder lock with a key, to be inserted into the key slot of a core, which key arranges the tumblers with cavities provided on the wide faces of the key, whereby in known manner two or more rows of non-rotatable tumbler pins are arranged in a flange of a housing projecting radially to the core, the tumbler pins being set-off to each other non rotatably due to the non-round cross-section and equal as to form of the bearing bore, one wide face of the key slot being pointed to the tumbler pins in symmetrical cross position to the flange.

It is known in so-called flat key constructions, to secure the tumbler pins disposed next to each other in two rows in different manner against rotation. In an embodiment to be considered always a plurality of tumbler pins have a joint bore. The tumbler pins are arranged, on the one hand, in a rectangular and, on the other hand, in a round cross-section. By this formation, the guide of the individual pins is effected by the relative engaging position. Thus, strongly dimensioned pressure springs must be coordinated to the tumbler pins, which render more difficult, however, the insertion and the removal of the key from the key slot. If the tumbler pins are arranged in a rectangular cross-section, however, the production of the pyramid-shaped points of the pins, cooperating with the key, and the cavities for the pins render difficulties in the key, while tumbler pins arranged with a round cross-section, pins preventing the rotation are to be provided at the tumbler pins.

Another formation shows individually guided tumbler pins, which, due to non-rotatability, have form at their jacket face ribs disposed equally spaced apart. Also with this formation, the technical drawbacks as to production result.

It is one object of the present invention to provide a cylinder lock of the same type with such tumbler pins, which by a spacially advantageous formation, considering the necessary non-rotatability, realize a simple production of the tumbler pins, as well as of the bearing bores in the flange of the housing, and permit a spacially crowded arrangement relative to each other, in spite of the fact that each pin has its own individual bore.

It is another object of the present invention, to provide a cylinder lock, wherein the cylindrical jacket face of the tumbler pins is arranged tangentially in two planes at an edge pointing towards the flange longitudinal center plane, whereby the one plane extends crosswise to the longitudinal direction of the flange and the other plane in longitudinal direction of the flange.

An advantageous embodiment resides, in accordance with the present invention, in the fact, that the pin-bearing bore has a longitudinal groove interrupting the cylindrical inner face, and on the longitudinal groove engage the planes of the pins guidingly at the edge of the abutting planes.

Furthermore, it is also favorable in accordance with the present invention, if the planes abut in the edge with an angle of about 90.degree. .

Due to such formation, a cylinder lock is created with tumbler pins simply to be produced, as well as bearing bores. The cross-sectional form of the tumbler pins permits a favorable tightly arranged provision of the pins in the cylinder lock, without causing a weakening of the housing relative to the stability of the bridge-shaped profile section in the double profile cylinder lock. Furthermore, the simple cross-sectional form permits a favorable production of the starting material for the tumbler pins in a drawing process, since the round cross-section is interrupted only by the two planes tangentially starting from the cylinder jacket face and abutting in an edge. The planes of the tumbler pins extending perpendicularly and parallel are arranged with their edge pointing to the longitudinal center axis in the most stable range of the flange and make possible most favorably the insert of corresponding working tools. By means of the latter, it is possible to work only one groove to each bearing bore. The working tool, preferably a working needle, can thus be designed such, that in addition to a good guide of the latter, still a favorable chip removal is brought about. The sides of the longitudinal groove realize a parallel guided displacement of the pins to the wall of the bearing bore and prevent simultaneously a rotation of the tumbler pins in the bearing bores. Both sides of the longitudinal groove form preferably an angle of 90.degree., while the plane of the edges is disposed at an angle of about less than 90.degree., whereby clampings of the tumbler pins in the bearing bores is excluded to a great extent.

With these and other objects in view, which will become apparent in the following detailed description, the present invention will be clearly understood in connection with the accompanying drawings in which

FIG. 1 is a part section of the profile cylinder lock designed double in accordance with the present invention;

FIG. 2 is a section along the lines II--II of FIG. 1;

FIG. 3 is a section in accordance with the lines III--III of FIG. 2; and

FIG. 4 is a top plan view of the tumbler pins sitting in the bearing bores.

Referring now to the drawings, a housing 1, formed as double profile cylinder, has two cylinder cores 3 and 4 disposed on an axis and mounted rotatably independently from each other.

The latter have at their oppositely disposed ends grooves 5, into which spring rings 6 are inserted and secure the cylinder cores against axial displacement in the housing 1. With the collar 7 limiting the grooves 5 enter the cylinder cores 3 and 4 into the closing beard hub 8, so that the latter is rotatably mounted on the latter. The joint connection of the closing beard hub 8 takes place by means of the core pin 9 and a displaceable coupling member 10, which, in known manner, abutted by the key, enters the projections 11 alternately into the cylinder core ends.

In the flange 12 of the housing 1, extending radially to the core, and in the cylinder cores are provided two parallel rows of tumbler pins with tumbler pins 13 sitting thereon set-off relative to each other.

In each tumbler pin 13, the cylindrical jacket face transforms tangentially into two planes 15 and 16 abutting at an edge 14 pointing towards an edge pointing to one of the longitudinal center planes of a flange. The plane 15 of the tumbler pins 13 is arranged crosswise to the longitudinal direction of the flange 12 and the other plane 16 extends in longitudinal direction to the flange (see in particular FIG. 4). Both planes 15 and 16 define therebetween an angle .alpha. of about less than 90.degree. .

The bearing bores 17 receiving the tumbler pins 13 are formed in accordance with the cross-sectional shape of the latter. Each bearing bore provided in the cylinder core and the flange has a longitudinal groove 19 interrupting the cylindrical innerface 18, the ends of the longitudinal groove 19 defining an angle .beta. of about 90.degree. and serving as guidance for the planes 15 and 16 abutting at the edge 14. The bearing bores 17 are closed by correspondingly formed pin sections 22.

Each tumbler pin 13 is formed of two parts, consisting of a coresided pin 13' and a flange-sided pin 13", the latter being abutted by pressure springs 23.

In order to make possible an easygoing closing, the end faces F of the pairs of tumbler pins are formed curved in a complementary arrangement to in adjustment to the sliding joint G of the core.

The core pins 13' enter with the truncated cone-shaped end 24 into the key slot 25, which is disposed in symmetrical cross position to the flange 12 and which is closed at the one narrow side by the filling member 26. The outer side face of the filling piece 26 is adjusted to the curvature of the core jacket and supports itself at the wall of the core bore 2. In order to secure the axially non-displaceable position of the filling member 26, the latter has the projecting wings 27, which enter in recesses 28 of the center core 3 and 4, respectively.

The cylinder lock has on the filling piece 26 at the inner side end of the key slot 25 the roof-shaped rib 30 forming an abutment for the key 29. The key 29 is equipped with grooves at the narrow sides towards the key end which grooves are opened and formed corresponding with the rib 30, so that it can be used as so-called turning key.

The length of the groove 31 is dimensioned such, that upon feeding the key 29 through the rib 30, an abutment limit is brought about. In this abutment position, the core pins 13' enter into cavities, which are provided on the wide faces of the key 29, so that the separation joint between the core pins 13' and the flange-sided pins 13" comes to lie on the sliding joint G of the cylinder core and the cylinder core can be rotated.

For a better insertion of the key 29 into the key slot 25, the key is roof like inclined at its face end.

While I have disclosed one embodiment of the present invention, it is to be understood that this embodiment is given by example only and not in any limiting sense.

Claims

I claim:

1. A cylinder lock comprising

a key to be inserted into a key slot of a core and arranging tumblers with cavities provided with wide faces of said key,

a housing having a flange projecting radially to said core,

at least two rows of non-rotatable tumbler pins arranged in said flange and sitting set off to each other due to a non-round cross-section and uniform bearing bore,

one of said wide faces of said key slot pointing in symmetric cross position towards said flange,

said tumbler pins having a cylindrical jacket face,

the latter leading tangentially into two abutting planes at an edge pointing towards the longitudinal center plane of said flange, and

one of said planes extending crosswise to the longitudinal direction of said flange and the other of said planes extending in longitudinal direction of said flange.

2. The cylinder lock, as set forth in claim 1, wherein

said pin-bearing bore has a cylindrical inner face and a longitudinal groove interrupting said inner face, and

said planes of said pins abutting at said edge engage guidingly at their sides.

3. The cylinder lock, as set forth in claim 1, wherein

said planes abut at the edge with an angle .alpha. of about 90.degree..