EP2088263B1 - Lock cylinder with with automatic return of the lock cam - Google Patents

Abstract

The cylinder has a flange section (3) comprising a housing (1). A cylinder core (4) is rotatably supported in a bearing section (2) and rotatably connected with a closing member (5). A return spring i.e. pressure spring, is fastened to the housing, and engaged at an eccentric pin, which is arranged eccentric to rotational axis of the cylinder core, to rotate the cylinder core to a neutral position. An end of the return spring is engaged at a fastening pin that is arranged in a chamber of the flange section, where another end is engaged at the eccentric pin of the cylinder core.

Description

The invention relates first to a lock cylinder having a bearing portion and a flange portion having housing, a rotatably mounted in the bearing portion cylinder core, which is rotatably connected to a closing member, and with a return spring which is attached on the one hand to the housing and on the other hand at an eccentric to the axis of rotation of the Cylinder core arranged eccentric engages to turn back the twisted from a neutral position cylinder core back to the neutral position.

Such a lock cylinder is for example from the DE 10 2006 020 614 A1 previously known. There sits on the cylinder core a helical compression spring which cooperates with a slider which rides on the cylinder core, but is rotatably coupled to the housing. The slider has a control cam which cooperates with a control projection of the closure member such that rotation of the cylinder core from a neutral position results in a return torque which is capable of rotating the rotated lock cylinder back to the neutral position.

A similar lock cylinder describes the DE 10 2004 048 231 A1 , Again, the return spring of the provision of the twisted cylinder core is used in a neutral position in which the closing member is located substantially in an alignment with the flange portion of the housing.

In the from the DE 695 05 725 T2 Her known lock cylinder is provided a leg spring, which is attached on the one hand to a mounting pin and on the other hand engages an eccentric of the lock cylinder. Unlike the locking cylinders discussed above, here the angle of rotation of the cylinder core is limited, so that no dead center position can arise.

From the DE 103 16 522 B3 For example, a lock cylinder is known in which a compression spring acts on an eccentric sleeve to apply a return torque to the cylinder core when it is rotated from the neutral position. This return spring engages the cylinder core so that it assumes a dead center position in an approximately 180 ° twisted position to the neutral position.

The DE 102 43 615 A1 describes an electronic cylinder system for panic locks. The electronic cylinder system described there has an external rotary knob with axis, which is guided through a cylinder adapter with closing element to the inside of the door. There is a disk rotatably mounted on the axis. This disc carries an eccentric pin on which a tension spring acts. The other side of the tension spring is anchored against a door-mounted mounting plate. The tension spring ensures that the closing element is turned back after being twisted.

The lock cylinder described above or the cylinder adapter described last is used on panic locks. Panic locks make the request to the lock cylinder that the closing member of the lock cylinder must always be in a lower neutral position, since otherwise it could hinder the panic function of the lock.

The invention has for its object to improve a lock cylinder of the type discussed above closing technology.

The object is achieved by the invention specified in the claims, each claim represents an independent solution to the problem and can be combined with any other claim.

First and essentially it is provided that the return spring is a compression or tension spring. This is different than the DE 102 43 615 A1 not in a separate, to be fastened on the inside of the door housing, but in a chamber of the flange portion. There is a mounting pin to which the hook end of the form of a tension spring having return spring engages. The other hook end of the return spring engages around the eccentric pin of the cylinder core. In the neutral position, in which the eccentric pin of the lock cylinder assumes its position closest to the flange section, the helical gears of the tension spring are substantially completely in the chamber, which is formed by a housing element. The eccentric pin may be the connecting web of two sections of the cylinder core. To increase the number of closing cycles, the two pins on which the two hook ends of the spring engage, bearing sleeves. These may be made of plastic or metal and are preferably slotted. Due to an axial slot, the bearing sleeve can be clipped onto the eccentric pin or the fastening pin. In the area of the slot edges, the bearing sleeves have radial webs. Before one of the two radial webs is the free end of the hook portion of the spring. Before the other radial web is a portion of the last spring coil, so that the bearing sleeve is connected to the hook ends substantially rotationally fixed. A rotation thus takes place only between bearing sleeve and eccentric pin or mounting pin. The concomitant friction is gentle on the material, since the surface pressure is minimized due to the large surfaces sliding against each other. The hook ends of the springs remain substantially stationary with respect to the respective bearing sleeve. The bearing sleeve also carries on its outer circumferential surface a plurality of axially extending ribs, which have in their center a recess in which the hooked end of the spring rests, so that the hooked end is also centered with respect to the axial direction. The chamber in which the spring rests in the neutral position is formed by a housing element which is closed by a further housing element. The mounting pin can from a Fixing screw may be formed, with which the two housing elements are screwed to the flange portion of the central housing.

In a further development of the invention, the return spring engages the cylinder core in such a way that it assumes a dead center position in an approximately 180 ° twisted position to the neutral position, and furthermore a supplementary spring is proposed which only comes into effect in the region of the dead center position. It forces close to the dead center on the cylinder core to a complementary torque, which acts away from the dead center.

The spring forces of the restoring spring and the supplementary spring add up in the region near the dead center position such that around the dead center position the overall spring characteristic runs steeper and only has a peak in the dead center position. The supplementary spring may be a bow spring which consists of a bent wire, wherein the wire is preferably bent into a ring. The ring may have the shape of an onion. The tip of the annular spring, which adjoin obliquely extending straight stirrup sections, can cooperate with a stop which is mounted in diametrical opposite position to the eccentric pin on the cylinder core. The spring tip of the opposite attachment portion of the supplementary spring may be attached to a wall of the chamber, which is located in the flange portion of the housing. There, a spring holder is provided, in which the attachment end is tied up with movement play. A fastening screw can engage in the ring clearance of the bow spring. In one embodiment of the invention it is provided that the eccentric stop carries a role. The tip of the supplementary spring interacts with the outer shell wall of this role. Since the Roller can rotate around the stop pin, the dead center position has taken its stability.

In a variant of the invention it is provided that the return spring is not formed by a tension spring, but by a compression spring. The two facing away from each other ends of the compression spring in this variant also engage an eccentric pin or on a mounting pin. In the neutral position, the compression spring is relaxed or slightly biased. The eccentric pin is in this position in its farthest position to the mounting pin. If the cylinder core is rotated by 180 ° into a position in which the eccentric pin is closest to the fastening pin, the helical spring is almost completely in the chamber. Unlike the previously discussed variant in which the helical turns of the spring in the neutral position are completely in the chamber, are in the compression spring variant, the helical turns of the spring in the neutral position to the maximum rotational position completely in the chamber. The compression spring is supported with their ends from each coupling elements. The coupling elements can be formed by eyes or bearing shells. Preferably, the coupling elements are formed by a piston and a cylinder, wherein the piston is inserted in the cylinder. Preferably, the piston or cylinder has an eye through which one of the pins, preferably the attachment pin protrudes, which is preferably formed by a fastening screw. On the lateral surface of the cylinder, in which the piston engages, sits the helical gear spring. The piston preferably has a cross-shaped cross-section. The opening of the cylinder has a corresponding counter-profile. The cylinder has a bearing shell which can be clipped onto the eccentric pin. The length of the piston or the cylinder is dimensioned so that the piston is guided in each rotational position of the cylinder core in the cylinder.

Fig. 1

in perspektivischer Darstellung das Gehäuse eines erfindungsgemä- ßen Schließzylinders,

Fig. 2

die Breitseitenansicht auf das Gehäuse,

Fig. 3

eine vergrößerte Darstellung des Schnitts III-III in der Neutralstel- lung,

Fig. 4

eine Darstellung gemäß Figur 3 in einer Totpunktlage,

Fig. 5

eine Darstellung gemäß Figur 4, wobei der Zylinderkern 4 geringfü- gig aus der Totpunktlage herausgedreht ist,

Fig. 6

einen Schnitt gemäß der Linie VI-VI in Figur 4,

Fig. 7

eine Explosionsdarstellung der Gehäuseelemente 14,15 und deren Bestandteile,

Fig. 8

eine Darstellung gemäß Figur 6 eines zweiten Ausführungsbeispiels,

Fig. 9

einen Schnitt gemäß der Linie IX-IX in Figur 8,

Fig. 10

einen Schnitt der Linie X-X in Figur 8,

Fig. 11

eine Explosionsdarstellung der Gehäuseelemente 14, 15 und deren Bestandteile,

Fig. 12

eine Darstellung gemäß Figur 10, wobei der Zylinderkern 4 leicht aus der Totpunktlage herausgedreht ist.

Fig. 13

eine Darstellung gemäß Figur 6 eines dritten Ausführungsbeispiels, bei dem die Rückstellfeder als Druckfeder ausgebildet ist,

Fig. 14

einen Schnitt gemäß der Linie XIV-XIV in Figur 13 in deren Neutral- stellung,

Fig. 15

eine Darstellung gemäß Figur 14 mit einem aus der Neutralstellung um 180° gedrehten Zylinderkern,

Fig. 16

das Federelement des dritten Ausführungsbeispiels in einer perspek- tivischen Darstellung und

Fig. 17

das Federelement des dritten Ausführungsbeispiels in einer Explosi- onsdarstellung.

Embodiments of the invention are explained below with reference to accompanying drawings. Show it:

Fig. 1

3 is a perspective view of the housing of a lock cylinder according to the invention,

Fig. 2

the broadside view of the case,

Fig. 3

an enlarged view of the section III-III in the neutral position,

Fig. 4

a representation according to FIG. 3 in a dead center,

Fig. 5

a representation according to FIG. 4 , wherein the cylinder core 4 is slightly unscrewed from the dead center,

Fig. 6

a section along the line VI-VI in FIG. 4 .

Fig. 7

an exploded view of the housing elements 14,15 and their components,

Fig. 8

a representation according to FIG. 6 a second embodiment,

Fig. 9

a section along the line IX-IX in FIG. 8 .

Fig. 10

a section of line XX in FIG. 8 .

Fig. 11

an exploded view of the housing elements 14, 15 and their components,

Fig. 12

a representation according to FIG. 10 , wherein the cylinder core 4 is slightly unscrewed from the dead center.

Fig. 13

a representation according to FIG. 6 a third embodiment in which the return spring is designed as a compression spring,

Fig. 14

a section according to the line XIV-XIV in FIG. 13 in their neutral position,

Fig. 15

a representation according to FIG. 14 with a cylinder core rotated by 180 ° from the neutral position,

Fig. 16

the spring element of the third embodiment in a perspective view and

Fig. 17

the spring element of the third embodiment in an exploded view.

The lock cylinders shown in the drawings are intended for installation in panic locks. Such panic locks have a lock housing with an insertion opening, which corresponds to the cross-sectional profile of the housing 1. This opening has a portion corresponding to the bearing portion 2 and a further portion corresponding to the flange portion 3 of the housing 1. Within the housing of the panic lock are a latch and a latch. The trap is preconnected by a latch spring and can be withdrawn by pressing a pusher. The bolt can be preconnected by means of the lock cylinder. This is done by rotation of the closing member 5. This occurs in a driving recess of the bolt tail. If the internal handle of the panic lock is actuated when the latch is locked, then the door pulls simultaneously with the latch retraction Latch back. This is not blocked by the closing member 5, it must be in the in the FIG. 2 shown neutral position are held.

The drive of the closing member 5 is carried out with a rotary knob which is fixed to a connecting flange 17 on the cylinder core 4. The cylinder core 4 is rotatably connected via a pin 20 with a sleeve 19 of the closing member 5. The cylinder core 4 has two sections 4 ', 4 ", which are connected to one another via an eccentric pin 7. The cylinder core 4 is rotatably mounted in a bearing bore of the housing elements 14, 15 under the interposition of bushes 16. The housing elements 14, 15 are located on the inside of the door On the outside of the door there is likewise a cylinder core and a drill protection 18, which is formed by steel balls which engage in a radial cavity of the flange section 3.

The housing element 14 forms a chamber 9 which is closed by the housing element 15. A fastening screw 8 and a retaining pin 26 hold the housing elements 14, 15 on the central housing 1. The fastening screw forms a fastening pin 8, which crosses the chamber 9. In the area crossing the chamber 9, the shank of the fastening screw is smooth-walled and is partially surrounded by a bearing sleeve 10. The bearing sleeve 10 supports a hook end 16 of a helical gear spring 6. The other hook end 6 'of the tension spring 6 also engages with the interposition of a bearing sleeve 10 on the eccentric pin 7 on.

The two bearing sleeves 10 are designed substantially the same and can be made of metal or of a plastic. The bearing sleeves 10 have an axial slot, so that they can be clipped onto the fastening pin 8 or the eccentric pin 7. The edges of the axial slot form radially projecting webs 11, 12. In front of the web 12 lies the free end of the hook 6 'or 6 " Sheath outside of the bearing sleeve 10 are located two spaced apart axial ribs 13 with a recess provided in the middle of the rib. In this recess lies the hook end 6 ', 6 ", so that the spring 6 is connected in a rotationally fixed and axially fixed manner to the bearing sleeve 19. The inner circumferential surface of the two bearing sleeves 10 slide on the outer walls of the eccentric pin 7 or of the fastening pin 8.

The eccentric pin 7 has the same radial position as the closing member 5. As a result, the spring 6 forms a return spring to the closing member 5 in the in the FIGS. 2 and 3 to keep shown neutral position. In the neutral position, the helical turns of the restoring spring 6 are located substantially in the chamber 9 formed by the flange section 3. Is the cylinder core 4 in the in the FIGS. 4 and 6 rotated position shown, the return spring 6 is tensioned. In the FIGS. 4 and 6 takes the cylinder core 4 a dead center. He is held there in an unstable equilibrium. If the cylinder core 4 slightly from this dead center, for example in the in FIG. 5 shifted position shown, the return spring 6 generates a torque on the cylinder core 4 and turns the cylinder core 4 automatically in the in the FIGS. 2 and 3 shown neutral position back.

That in the FIGS. 8 to 12 illustrated second embodiment additionally has a supplementary spring 22, which only comes into effect in the dead center. The supplementary spring 22 is a bow spring made of a spring steel wire bent into a ring. The outline contour of the ring resembles an onion shape and forms a point 22 '. The tip portion 22 'opposite portion in which the free ends of the spring wire are closely adjacent to each other, forms a fixing portion. This section is between two jaws of a spring holder 21 which is screwed with a fastening screw 23 on a wall of the chamber 9. The wall is formed by the closure part 15. The fixing screw 23 passes through the interior of the bow spring 22. The spring is located with lateral bending movement play in the pen holder.

The tip 22 'and the rectilinear portions 22' of the spring wire adjoining the tip 22 'lie in the region of the cavity of the housing elements 14, 15 that bears the cylinder core 4. The eccentric pin 7 forms on the complementary spring 22 associated side of a ring land 27 to fix the bearing sleeve 10 axially. In diametrically opposite to the eccentric pin 7 is a stop pin 24 which is formed by the end of a threaded screw or a fixed force or positive locking axis, which is pressed in the axial direction in the cylinder core 4. The stop 24 carries a roller 25. The latter is rotatable about the stop 24. The roller 25 has an outer circumferential surface, which is in the area of action of the tip 22 'and the adjoining portions 22 ".

If the cylinder core 4 is rotated starting from a neutral position, the return spring 6 is tensioned until the eccentric pin 7 in the FIGS. 8 . 9 and 10 idealized shown Totpunktstellung achieved. Shortly before reaching the dead center position, the lateral surface of the roller 25 acts on the spring section 22 "and bends the spring such that it exerts a torque on the stop 25, which is directed away from the dead center position However, this is not the case in reality because of the backlash of the complementary spring 22. In reality, the tip 22 'is slightly offset from the dead center line in order to reach the theoretical position as well the dead center of the eccentric pin 7 to exert a torque on the cylinder core 4. In this case, the adjoining the tip 22 'straight portion 22 "of the spring clip 22 engages the roller 25 at.

The last discussed the dead center effect reducing supplementary spring can be provided not only on a lock cylinder, wherein the return spring is formed by a tension spring. The supplementary spring arrangement is also suitable for a lock cylinder, as it is known from the aforementioned prior art ago. A supplementary spring which only comes into effect in the area of the dead center position can, in particular, be attached to a lock cylinder according to FIG DE 10 2004 048 231 B4 or on a lock cylinder according to DE 10 2006 020 614 be provided.

That in the FIGS. 13 to 17 illustrated third embodiment differs from the two embodiments described above by the nature of the return spring. While in the embodiments described above, the return spring 6 is a tension spring, the return spring is in the in the FIGS. 13 to 17 illustrated third embodiment, a compression spring 6. Also in this embodiment, the lock cylinder forms a chamber 9. The housing element 15 is connected by means of a fastening screw 8, which forms a fastening pin, with the flange portion 3 of the lock cylinder. The fastening screw 8 engages through a fastening eye 29 of a piston 28. The piston 28 protrudes from a support surface 33 and engages in a cavity 32 of a cylinder 30 a. The cylinder 30 also protrudes from a support surface 34. The support surface 34 is formed by a bearing shell 31 which is clipped onto the eccentric pin 7.

The helical gear compression spring 6 is located on the lateral surface of the cylinder 30. The end 6 'of the helical compression spring is supported on the support surface 33 of the eye 29 and the end 6 "of the return spring 6 facing away from it on the support surface 34 of the bearing shell 31. The length of the piston 28 and the cylinder 30 is dimensioned such that in the in FIG. 15 shown 180 ° twisted position from the neutral position of the piston 28 completely in the cylinder 30 is stuck. In the in FIG. 14 shown neutral position is only the end portion of the piston 28 in the cavity 32 of the cylinder 30th

When not torque-loaded closing member 5, the pressure force of the biased return spring 6 ensures that the cylinder core 4, the in FIG. 14 shown assumes neutral position. In this neutral position of the eccentric pin 7 has its maximum distance from the mounting pin 8. The return spring 6 projects in regions in the cross-sectional area of the cylinder core 4th

Is based on the in FIG. 14 shown neutral position of the cylinder core 4 rotated by 180 °, it reaches the in FIG. 15 shown position in which the compressed return spring 6 rests completely in the chamber 9.

The piston 28 may be formed by a casting, in particular by a plastic injection-molded part and be mounted with the interposition of a bearing sleeve 10 on the mounting pin 8. Also, the cylinder 30 may be made of plastic. He may also be stored with the interposition of a bearing sleeve on the eccentric pin 7. The bearing shell 31 surrounds the eccentric pin 7 by a peripheral region which is greater than 180 °, so that the diametral of the two arms of the bearing shell is included.

It is of course also possible that the cylinder forms the eye and the piston forms the bearing shell.

Claims (15)

1. Lock cylinder comprising a housing (1) having a bearing portion (2) and a flange portion (3), a cylinder core (4) which is rotatably mounted in the bearing portion (2) and is rotationally engaged with a lock member (5), and comprising a restoring spring (6) which is fixed on one side to the housing (1) and, on the other side, acts on a cam pin (7), arranged off-centre from the axis of rotation of the cylinder core (4), to turn the cylinder core (4) which has been rotated out of a neutral position back into the neutral position, characterised in that a first end (6') of the restoring spring acts on a fixing pin (8) arranged in a chamber (9) of the flange portion (3) and a second end (6") acts on the cam pin (7) of the cylinder core (3).
2. Lock cylinder according to claim 1, characterised in that the restoring spring (6) is a tension spring with ends in the form of hook ends, one hook end (6') encompassing the fixing pin (8) arranged in the chamber (9) of the flange portion (3) and the other hook end (6") encompassing the cam pin (7) of the cylinder core (3).
3. Lock cylinder according to either of the preceding claims, characterised in that the spring (6) is a helical spring, the coils of the spring (6) lying within the chamber (9) in the neutral position or in a position of the cylinder core (4) rotated by 180° thereto.
4. Lock cylinder according to any one of the preceding claims, characterised in that the cam pin (7) is the connecting web between two portions (4', 4") of the cylinder core (4).
5. Lock cylinder according to any one of the preceding claims, characterised in that the hook ends (6', 6") of the spring (6) each rest on bearing sleeves (10) which are rotatably associated with the fixing pin (8) and the cam pin (7) respectively, each of the bearing sleeves (10) having in particular an axial slot in order to be placed, in particular clipped, onto the fixing pin (8) and the cam pin (7) respectively, and said bearing sleeves in particular forming radially projecting webs (11, 12) at the edges of the slot and/or forming a plurality of ribs (13) which extend substantially in the axial direction, are arranged on the surface of the bearing sleeves (10) and in each case form a central recess in which the hook end (6', 6") of the restoring spring (6) rests.
6. Lock cylinder according to claim 1, characterised in that the restoring spring (6) is a compression spring, the ends (6', 6") of which are each supported on a support surface (33, 34), the support surfaces (33, 34) each being formed by an eye (29) or a bearing shell (31) which act on the cam pin (7) and the fixing pin (8) respectively, the bearing shell (31) in particular being clipped onto the cam pin (7) or the fixing pin (8).
7. Lock cylinder according to any one of the preceding claims, characterised in that the bearing shell (31) or the eye (29) is formed by a piston (28) or a cylinder (30) of a piston-cylinder unit.
8. Lock cylinder according to either claim 6 or claim 7, characterised in that the helical compression spring (6) is arranged on the outer surface of a cylinder (30) in which a piston (28) is located.
9. Lock cylinder according to claim 8, characterised in that the piston (28) or the cavity (32) of the cylinder (30) has a cross-shaped cross-section.
10. Lock cylinder according to any one of the preceding claims, characterised in that the restoring spring (6) acts on the cylinder core (4) in such a way that said core assumes a dead centre position in a position rotated by approximately 180° from the neutral position, and further characterised by a supplementary spring (22) which only becomes operative in the region of the dead centre position and applies a torque, which acts in the direction away from the dead centre position, to the cylinder core (1).
11. Lock cylinder according to claim 10, characterised in that the supplementary spring (22) is a loop spring which is basically in the form of an onion in particular.
12. Lock cylinder according to either claim 10 or claim 11, characterised in that the supplementary spring (22) cooperates with a stop (24) diametrically opposite the cam pin.
13. Lock cylinder according to any one of claims 10 to 12, characterised in that a tip (22') of the supplementary spring (22) co-operates with the circumferential surface of a roller (25) rotatably arranged on the stop (24).
14. Lock cylinder according to claim 13, characterised in that a fixing portion of the spring (22) opposite the tip (22') is fixed to the wall of a chamber (9) of the flange portion (3) with room to bend by a spring holder (21).
15. Lock cylinder according to any one of claims 10 to 14, characterised by a fixing screw (23) which penetrates through the interior of the loop of the spring (22).

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