WO1991011582A1

WO1991011582A1 - Lock releasable by the insertion of a locally magnetised key card

Info

Publication number: WO1991011582A1
Application number: PCT/EP1991/000035
Authority: WO
Inventors: Armin Eisermann
Original assignee: Schulte-Schlagbaum Aktiengesellschaft
Priority date: 1990-01-25
Filing date: 1991-01-11
Publication date: 1991-08-08
Also published as: CN1053652A; AU7148691A; DE4002093A1

Abstract

The invention relates to a lock releasable by the insertion of a locally magnetised key card (8) in which the leading edge (8') of the key card (8) conveys a bolt (25) released by the magnetic holding pins (31) with it, and, to provide a particularly reliable version, proposes that there is a mating coupling between the key card (8) and the bolt (25) which is automatically released only shortly before the fully withdrawn position of the bolt (25).

Description

Lock with a locking function that can be released by inserting a key card ignored in certain areas

The invention relates to a lock with freizu by inserting a key card magnetised in some regions _¬ imaging locking function according to the preamble of claim

1.

A lock of the type in question is known from EP 0 241 323 A2, two resilient sections serving to lock the slide which is advanced against the spring load by means of the key card and which engage behind locking pawls articulated at the sides of the slide. The control of the same takes place via the facing broad area of the key card when the same is inserted. When the key card is removed, the pawls are removed from the abutment, so that the return spring acting on the slide can take effect, thereby disengaging the pawls from the resilient sections. With such a lock, incorrect operations are possible in that the key card can be pulled out and the slide remains in the forward position, for example caused by clamping, inserted cardboard strips or the like. The consequence of this is that the clutch remains locked and the door is revealed to everyone.

The object of the invention is based on the object of specifying a lock of the type in question of increased security value such that when the key card is removed the slide always assumes its initial position which has been moved back. The object of the invention is solved by the invention specified in patent claim 1.

The subclaims represent advantageous developments of the inventive solution.

As a result of such a design, a lock of the generic type with an increased security value is specified. There is always a guarantee that when the key card is removed, the slide will assume its final return position. The prescribed locking method cannot therefore be avoided. The correct function of the lock also only works if the key card is in order. The standard key card differs from the normal key card in that it has a slightly different shape, which only allows the form-fitting coupling between the key card and the slide. Likewise, the position of the change on the key card is also important, so that in a certain sense a locking function is still achieved. Furthermore, the slide in the corresponding area has been modified so that both areas of that of the slide and that of the shooting card generate the positive locking coupling in the first place. The latter is only created after the key card has been fully inserted or when the slide is then moved forward. An advantageous variant is characterized in that the positive-locking coupling is formed by a pin mounted in the slide and automatically controlled by the slide movement in a hole in the key card. The manufacturing outlay for this additional function can therefore be kept extremely low. It is only necessary to accommodate a corresponding pin in the slide. However, the key card must form the hole at the corresponding point. That means that after inserting the Key card in the key card insertion slot of the lock the pin and the hole together volatile _¬ th. In the then commencing forward movement engages the pin shape to fit into the hole and remains in the _¬ sem in the vorverlagerten position of the slide. When the key card is removed, the slide is inevitably taken along with the pin. The pen only leaves the hole in the final phase of the card withdrawal movement. Since the latter is conical at both ends, this brings advantages when the pin is turned on and off. Otherwise, it has a greater length than the thickness of the slide, so that the ends can protrude beyond the slide. In the displaced position of the slide, the one frustoconical end protrudes into a preferably frustoconical recess in the lock housing. After the key card has been inserted and the feed has begun, the pin leaves the frustoconical recess with this frustoconical end and then projects with its opposite frustoconical end into the hole in the key card. If a key card is selected that does not have a hole at the correct position, the key card can be inserted, but the slide cannot be moved forward, since the pin is then no longer able to evade. Accordingly, it acts as a lock against unauthorized advance of the slide. The area of the slide facing the mouth area of the key card insertion slot is particularly suitable for accommodating the pin. In the preferred possible use of the lock, this represents the part that controls the clutch between an actuating handle and a handle pin when the slide is displaced. If the key card is removed, this also guarantees that the coupling between the actuating handle and the press mandrel is released is. With regard to the actuating handle, it is the actuating member on the outside of the door, so that a mortise lock provided with the lock designed according to the invention cannot be actuated on the door.

An embodiment of the invention is explained below with reference to the drawings. It shows:

Fig. 1 with a designed according to the invention

Locked door, seen in the direction of the rebate,

2 shows a correspondingly designed key card,

3 is a plan view of the castle,

4 is a rear view of the castle,

5 is a perspective view of the essential components of the lock,

6 shows a top view of the inner lock housing,

7 is a foldable representation of FIG. 6,

8 is a foldable representation of Figure 6,

9 is a side view of the lock housing,

10 is a rear view of the lock housing,

11 shows a longitudinal section through the lock when the slide is in the final displacement end position, Fig. 12 is a representation corresponding to Figure 11, wherein the key card is fully inserted into the slot and

13 shows the subsequent representation following FIG. 12 with the slide advanced in front by means of the key card, producing the form-fitting coupling between the key card and slide, and with coupling of the actuating handle to the pusher mandrel.

1, a lock 1 designed according to the invention is fixed to a door 2 - for example a hotel room door. The lock 1 has a lock case 3 which is arranged on the outside of the door and has a rectangular plan, which has an actuating handle 4 at one end. With their help, a trap 5 can be withdrawn. An inside turning handle 6 arranged on the inside of the door 2, on the other hand, is directly connected to the latch 5, so that a door opening can always take place from this side of the door 2.

The lock case 3 is provided at the end opposite the operating handle 4 with an insertion slot 7 for a key card 8 magnetized in some areas. Furthermore, the lock case 3 accommodates a lock housing 9. The latter has a bottom part 10, a middle part 11 and a cover part 12. The half-shell-like bottom part 10 is connected to the middle part 11 by means of screws 13 which enter it. These two aforementioned parts 10 and 11 are previously plugged together, starting from the central part 11 in the direction of the base part 10 centering feet 14 which engage in niches 15 provided for this purpose in the base part 10. The screws 13 also serve to fix the Cover part 12. From this, housing side walls 16, 17 extend in the card insertion direction, which are provided at the card insertion end with inwardly directed support tabs 18 into which the screws 13 engage. The end of the lid part 12 opposite the insertion slot 7 has a tongue 19 which engages in a recess 20 of a dome 21 of the middle part 11 when the lid part 12 is pushed onto the middle part 11. Furthermore, a rear grip is achieved at the end of the side walls 16, 17 opposite the tongue 19, for which purpose hook-shaped projections 22 and 23 of the central part 11 and cover part 12 overlap.

The bottom part 10 and the middle part 11 are then joined together at the end facing away from the insertion slot 7 by means of two further screws 24 to form a unit. While aluminum is used for the bottom part 10 and middle part 11, the cover part 12 consists of plastic. Between the cover part 12 and the middle part 11 there is also a plate-shaped slide 25 made of plastic. With its broad side, the slide 25 rests on the center 11. The opposite guide surface forms a locking plate 26 made of brass, which is inserted into the cover part 12 and is immovably fixed there with laterally projecting sections 27, 28. The holes 29 of the locking plate 26 are aligned in the locking position of the lock shown in FIG. 11 with bearing recesses 30 of the slide 25 designed as through bores. Magnetic tumbler pins 31 lie in the bearing recesses 30. It is not necessary to provide a tumbler pin 31 in each bearing recess 30, since the number, the position and the polarity of the tumbler pins 31 depend on the respective opening code / combination of the lock 1. On the other side of the locking plate 26 there is a baffle 32, also made of brass, with an anchor plate 33 opposite it. The latter is held in position by three compression springs 34. The aforementioned compression springs 34 are in turn supported on the cover part 12.

In contrast to the other components, the anchor plate 33 consists of ferromagnetic material. The anchor plate 33 thus attracts the magnetic tumbler pins 31, which consequently engage in the holes 29 in the locking plate 26. In this position, the slide 25 cannot move from its position shown in FIG. 11 illustrated basic position, since the engagement of the tumbler pins 31 in the housing-fixed locking plate 26 prevents this. It would be possible to provide a portion of the bearing recesses 30 of the slide 25 in rotating bodies of the slide, not shown, in order to be able to change the code by rotating these rotating bodies.

Both the anchor plate 33 and the guide plate 32 adjoin the insertion slot 7 of the lock case 3. Their front transverse edges 32 ', 33' are angled in opposite directions and form a gusset for the key card 8 to be inserted. The opposing wide areas of guide plate 32 and anchor plate 33 represent the key card insertion slot 35.

A tension spring 36 serving as a return spring is fixed at one end to a cross pin 37 of the middle part 11. This cross pin 37 extends from the side of the middle part 11 opposite the slide 25 and projects into the interior of the bottom part 10. The other End of the tension spring 36 engages a slot 38 of the central portion 11 extending through projection 39 of the slide 25 at _¬ bers, whereby this is moved to a in Figure 11 anschlag¬ limited basic position. The projection 39 is also preceded by two bevelled lugs 40, 41 of the slider 25, which, like the projection 39, also pass through the middle part 11. The bevels 40 ', 41' of the lugs 40, 41 are designed to run in the same direction. They engage obliquely angled tabs 42, 43 of a web 44 of a tongue 45 made of spring material. A central recess 46 of the same is penetrated by the nose 40.

The insert-side end of the spring tongue 45 extends between the middle part 11 and the bottom part 10 and is fixed there by means of the screws 13 which pass through openings 47 of the spring tongue 45.

The end 48 opposite the fastening end of the spring tongue 45 is fork-shaped and engages in an annular groove 49 of an internally toothed coupling sleeve 50. According to the uncoupled position in FIG. 11, the coupling sleeve 50 comprises a pinion 51 which is arranged with a collar 52 of larger cross section in a bearing opening 53 of the base part 10. In the collar 52 there is a diametrical slot 54, in which a ha-shaped end 55 of a presser mandrel 56 is immersed. The same is rotatably connected to the internal turning handle 6.

A gear 57 is located opposite the pinion 51. Both the toothed pinion 51 and the toothed wheel 57 have the same toothing and are adapted to the inner toothing of the coupling sleeve 50. The gear 57 in turn is firmly connected to the external turning handle 4. to The position of the gear wheels 51, 57 is stabilized by a centering pin 51 'which extends from the pinion 51 and which plunges into a cross-sectionally adapted blind bore 57' of the gear wheel 57. The same extends within the

5 domes 21 of the central part 11 and lies there with a larger cross section 57 ' ^• in a bearing cavity 58 of the dome 21. In the uncoupled position, the coupling sleeve 50 only encompasses the pinion 51 and is accordingly not in engagement with the gear 57.

* Rotational displacement of the external turning handle 4 therefore does not result in entrainment of the pinion 51 and thus the pusher mandrel 56. In order that the coupling sleeve 50 does not leave its basic position unintentionally, a compression spring D comprising the coupling sleeve 50 is provided, which can be

S is supported at one end on the inside of the dome 21 and on the other hand acts on a collar 50 'of the coupling sleeve 50.

At its narrow edges 2 _f lying in the direction of displacement, the slide 25 is fitted with a stop cam 59 each. These cooperate with lateral spring sections 60 of the tongue 45, which spring sections with locking lugs 60 'cooperate with the stop cams 59.

25 A form-locking coupling can be produced between the key card 8 and the slider 25. The positive-locking coupling is formed by a pin 62 mounted in a bore 61 of the slide 25. The bore 61 is located at the mouth end of the key card slot 1. According to the exemplary embodiment, two such bores 61 are arranged symmetrically to the longitudinal center of the slide 25. However, only one bore 61 is equipped with a pin 62. The two ends 63, 64 of the pin 62 are conical. The total length 5 of the pin 62 is greater than the thickness of the slider 25. The conical end 64 facing the middle part 11 engages in the rear displacement end position of the slide 25 in a frustoconical recess 65 of the lock housing β or the middle part 11. The depth of this recess 65 is less than the height of the conical end 64. In this rearward displacement end position, the other conical end 63 projects beyond the other broad surface of the slide 25 and projects into the key card insertion slot 35, that the conical end 63 is supported on the anchor plate 33 by passing through a longitudinal slot 66 of the guide plate 32.

The pin 62 interacts with one of two holes 67 in the key card 8. These holes 67 are also arranged symmetrically to the longitudinal center of the key card 8. If two bores 61 and two holes 67 are arranged, the guide plate 32 must also be equipped with two longitudinal slots 66 such that, depending on the use of the pin 62, the pin 62 passes through one or the other longitudinal slot. However, the lock can also be designed so that the key card 8 has only one hole and the slide 25 has only one bore 61. This also applies to the longitudinal slot 66 in the guide plate 32. It would be possible to provide the pin 62 at a different location on the slide 25. A variation would be conceivable in that the pin receives the diameter as the tumbler pins 31 and could accordingly also be accommodated in one of the corresponding bearing recesses 30 of the slide 25.

The following mode of action occurs. If the lock 1 is to be actuated from the outside by means of the external turning handle 4, then it is necessary to insert the correspondingly coded key card 8 into the insert. to insert slot 7. In doing so, it displaces the anchor plate 33 acted upon by the compression springs 34 in the transverse direction. In the fully inserted position, the key card 8 enters with its front edge

5 te 8 'in front of a slide stop 25' pointing in the direction of the cover part 12. In this position, the magnetic tumbler pins 31 are displaced such that they leave the holes 29 in the locking plate 26. Furthermore, the end 63 of the pin 62 facing the key card insertion slot g is aligned with one of the two

Holes 67 of the key card. The key card 8 can now be moved further, the slider 25 being dragged against the force of the tension spring 36. During this displacement, the recess β 65 in connection with the conical end 64 causes one

Control of the pin 62 such that it, as illustrated in FIG. 13, dips into the associated hole 67 of the key card 8. A key card that does not form a hole could be inserted, but f the slide would not be able to be advanced, since there is no space for pin 62 to escape.

In the forward position, the latching lugs 60 'of the spring sections 60 engage behind the stop cams 59 of the slide 25 and hold them in the forward position. Along with the forward displacement of the slide 25, the web 44 was acted upon by the bevel 40 'of the nose 40 and the spring tongue 45 was pivoted about its clamping points. Since the free, forked t end 48 of the tongue 45 is in engagement with the coupling sleeve 50, this is displaced such that it then engages over the gear 57. Since both gear wheels 51, 57 are now encompassed by the coupling sleeve 50, the lock 1 can be actuated by means of the external turning handle 4. It is not possible that in the clutch position the key card can be removed in such a way that the lock remains in the coupling position. When the key card 8 is withdrawn, the slide 25 is inevitably moved into the final displacement position via the pin 62 which has entered the key card. It thereby comes into alignment with the recess 65 and thus allows the key card to be removed completely. During the card withdrawal movement, the catch between the stop cams 59 and the catch noses 60 'of the spring tongues 45 was overcome, in such a way that the starting position is again present. The coupling sleeve 50 was also returned by the fact that the other nose 41 with its inclined surface 41 'acts on the tab 43 of the web 44 and thus also returns the spring tongue 45 to its end position.

Furthermore, electrical switches 68, 69, 70, 71 are fixed to the lock housing 9, which in turn are actuated by the slide 25. However, the control of the electrical switch is not essential to the invention, so that it will not be discussed further.

The mericmale of the invention disclosed in the above description, the drawing and the claims can be of importance both individually and in any combination for the implementation of the invention. All the features disclosed are essential to the invention. The disclosure content of the associated / attached priority documents (copy of the prior application) is hereby also included in full in the disclosure of the application.

Claims

EXPECTATIONS

1. lock with an associated bender by inserting a partially agnetisierten key card (8) closing _¬ function, wherein the front edge (8 ') (8) entrains a released by the magnetic pin tumblers (31) slide (25) of the Schlüssel¬ card, which slide Locked in the forward position, which rest is controlled after a partial return of the key card to the release position, characterized by a positive-locking coupling between the key card that only automatically triggers shortly before the return end position of the slide (25) (8) and slide (25).

2. Lock, in particular according to claim 1, characterized gekenn¬ characterized in that the positive-locking coupling of a in the slide (25) mounted, automatically by the slide movement in a hole (67) of the key card (8) modulating pin (62 ) is formed.

3. Lock, in particular according to one or more of the preceding claims, characterized in that the pin (62) is conical at both ends (63, 64).

4. Lock, in particular according to one or more of the preceding claims, characterized in that the pin (62) is arranged directly on the ignition side of the key card slot (35).

5. Lock, in particular according to one or more of the preceding claims, characterized in that the slide displacement a clutch between actuators control handle (4) and a trigger mandrel (56) on or off.