EP0792985A1 - Electric striker - Google Patents

Abstract

The invention relates to an electric door opener (2) with a change (6) which can be acted upon by an armature (8) and a magnetic coil (13) and which is arranged to be adjustable in order to release or lock a door opener latch (4). In order to be able to use an electric door opener (2) both as a quiescent current door opener and as a working current door opener, a device (10) is provided with which the armature changing system can be switched in accordance with the respective requirements and with particularly little effort from quiescent current to working current and vice versa. <IMAGE>

Description

The invention relates to an electric door opener according to the preamble of claim 1.

Such a door opener is known for example from EP 0 279 878 A1. The function of this electric door opener is basically based on the fact that a change is held by an armature in the swiveling range of a door opener latch until the armature releases the change by actuating a magnetic coil. With the help of a change spring, the change is brought out of the swivel range of the door opener latch.

There are two types of electric strikes, i.e. between an open-circuit version and a closed-circuit version. In the case of a working current version, the armature is actuated by energizing the magnetic coil against the pretension of the armature spring, while a door opener in the closed-circuit version can only be opened when the current is switched off. When closed-circuit electric strikes are energized, they lock against it.

Previously, it was necessary to provide and keep ready two different basic designs for these two types of electric strikes. This entailed increased costs, in particular costs for storing the two types.

The invention has for its object to provide an electric door opener that can be used as a working current door opener as well as a quiescent current door opener without any significant effort.

According to the invention the object is achieved by the characterizing features of claim 1. Useful and advantageous configurations are contained in the subclaims and in the description of the figures.

The invention is based on the consideration of developing a switchable door opener which can be converted from a closed-circuit version into an open-circuit version and vice versa in an extremely short time. For this purpose, a device is provided for the optional type changeover between closed-circuit and open-circuit type by means of a three-point anchor travel limitation, which defines one type in one position and the other type in the other adjustable position.

The fact that only a single door opener type has to be constructed and manufactured, which can then be used as an open-circuit door opener or closed-circuit door opener according to the respective requirements, reduces the storage effort. At the same time, such a switchable electric door opener has a higher utility value due to the possibility of variable use.

A basic idea of the invention is to assign three positions, namely the positions unlocked-locked-unlocked, to the anchor, which can be held in an unlocking position and a locking position in the previously known door openers. The construction according to the invention could also be designed such that the locked-unlocked-locked positions are reached.

According to the invention, based on the three positions, a quiescent current-open-circuit switching is carried out by blocking the first or the last position of the armature, i.e. Depending on the version, one of the two "unlocked" positions or one of the two "locked" positions.

While an anchor can take three basic positions, namely unlocked-locked-unlocked, without locking, e.g. the first position blocked for the quiescent current version. The basic positions locked-locked-unlocked then result.

The last unlocked position is locked for a working current door opener, so that the unlocked-locked-locked position can be assumed.

The corresponding basic positions can be blocked with various designs.

In a preferred, particularly simple and efficient embodiment, a device is used which interacts with the anchor and the change. By adjusting this device, which can be carried out without expenditure of time and tools, the predeterminable two positions locked-unlocked or unlocked-locked are selected from the three possible positions locked-unlocked-locked.

In a preferred embodiment, the device is designed as a rotary stop which is adjustable about an axis of rotation arranged parallel to the pivot axis of the change and the armature. This rotary stop can be adjusted or rotated, for example, with a commercially available screwdriver, in order to be able to implement both a working current position and a quiescent current position.

In an expedient embodiment, the rotary stop is an almost circular disk which has at least one means by which it can be held in or on the housing of the electric door opener in the required two positions. The rotary stop is thus provided with a stop for its rotary movements and cannot be turned further than intended.

A latching element can advantageously be formed on the rotary stop, which can snap into a complementary recess for a quiescent current position in the housing or on the base plate or into a recess for a working current position. If a locking lug is provided on the circumference of the rotary stop, e.g. notches in the housing can be formed as recesses. It can also be provided a non-rotatably connected locking bolt which is held adjustably in at least two positions.

The required positions of the armature interacting with the change, which is arranged above the rotary stop and is adjustable about a vertical swivel axis, are made possible with the help of formations, for example, of circular sector-like pins on the almost circular, disk-shaped rotary stop.

These pins on the surface of the rotary stop cooperate with a suitably designed anchor and an interchangeable head in such a way that the first or third unlocked position of the three possible basic positions of the anchor is locked.

Instead of a rotary stop, other constructions can also be provided for locking these unlocked positions. For example, there is the possibility of inserting a threaded pin as a locking element over the housing in order to lock the corresponding position.

However, the rotary stop in the described construction shows advantages in manufacture and assembly as well as an extraordinarily high reliability in use.

Fig. 1

eine Seitenansicht eines erfindungsgemäßen elektrischen Türöffners bei abgenommenem Gehäusedeckel;

Fig. 2

eine perspektivische Darstellung einer Ausführungsform einer Funktionseinheit von Drehanschlag, Anker und Wechsel;

Fig. 3

eine perspektivische Darstellung eines Drehanschlags;

Fig. 4

eine perspektivische Darstellung eines Ankers;

Fig. 5

eine perspektivische Darstellung eines Wechsels;

Fig. 6

eine Teil-Seitenansicht eines erfindungsgemäßen elektrischen Ruhestrom-Türöffners gemäß Fig. 2 in Position A;

Fig. 7

eine Teil-Seitenansicht eines erfindungsgemäßen elektrischen Ruhestrom-Türöffners gemäß Fig. 2 in Position B;

Fig. 8

eine Teil-Seitenansicht eines erfindungsgemäßen elektrischen Arbeitsstrom-Türöffners gemäß Fig. 2 in Position B und

Fig. 9

eine Teil-Seitenansicht eines erfindungsgemäßen elektrischen Arbeitsstrom-Türöffners gemäß Fig. 2 in Position C.

The invention is explained below with reference to a drawing; in this show in a highly schematic representation:

Fig. 1

a side view of an electric door opener according to the invention with the housing cover removed;

Fig. 2

a perspective view of an embodiment of a functional unit of rotary stop, anchor and change;

Fig. 3

a perspective view of a rotary stop;

Fig. 4

a perspective view of an anchor;

Fig. 5

a perspective view of a change;

Fig. 6

a partial side view of an electrical closed-circuit electric strike according to the invention according to FIG 2 in position A;

Fig. 7

a partial side view of an electrical closed-circuit electric strike according to the invention according to FIG 2 in position B;

Fig. 8

a partial side view of an electric shunt door opener according to the invention according to FIG. 2 in position B and

Fig. 9

a partial side view of an electric shunt door opener according to the invention according to FIG. 2 in position C.

Figure 1 illustrates an electric door opener 2 in a side view, in which a housing cover is removed. For a clear representation, only those door opener parts are shown and described which are directly related to the design according to the invention.

A door opener latch 4 is mounted in a known manner to be deflectable about a pivot axis 14 lying in the plane of the drawing. The door opener latch 4 is acted upon by a change 6, the pivot axis 16 of which runs perpendicular to the plane of the drawing. The change 6 is biased against the door opener latch 4 with a change spring 26, which is supported against a door opener housing 12.

The change 6 is blocked or released by an armature 8, which is designed like a pivot lever and has a recess 25 for receiving a change head 17.

In this exemplary embodiment, a magnetic coil 13 is arranged to the right of the armature 8. When the solenoid 13 is energized, a coil core 22 coming out of the coil 13 presses the armature 8 to the left, so that the position B or C (see FIG. 2) is reached.

It is also possible that the magnetic coil is arranged to the left of the armature. The armature is then attracted to the left against a right-facing armature spring when energized.

The armature 8 according to FIG. 1 is adjustable about a pivot axis 9, which runs parallel to the pivot axis 16 of the change 6 mounted and is acted upon by an anchor spring 28 which is fixed to the door opener housing 12 in the position shown.

A rotary stop 10, which is arranged below an engagement area 25 of the armature 8 for the interchangeable head 17, is used for converting or switching over the electric door opener from a closed-current door opener to a working current door opener and vice versa.

The structural parts essential for a switchable quiescent-current, open-circuit electric strike are shown in FIG. 2. The change 6, which locks or unlocks a door opener latch 4 according to FIG. 1, interacts with an armature 8, which is moved by a magnetic coil 13 (FIG. 1) and is limited in its pivoting movement about an axis 9 by a rotary stop 10 .

While an anchor can only realize two positions, namely unlocked or locked, in previously known electrical door opener designs, the anchor 8 according to FIG. 2 enables three positions: unlocked A - locked B - unlocked C.

A quiescent-current-to-work current switchover is achieved in that the first position unlocks A and on the other hand the second position unlocks C is locked.

The first unlocked position is locked for a closed-circuit electric strike and the second unlocked position for an open-circuit electric strike.

As shown in Fig. 1, the armature 8 is pressed to the right by an armature spring 28 and moved to the left by the influence of a energized solenoid 13 or a coil core 23.

The locking of the unlocked positions is achieved by the rotary stop 10 in a particularly effective and reliable manner.

The rotary stop 10, which can be fastened, for example, to a base plate 3 of the electric door opener 2 (FIG. 1), can be adjusted from a position D to a position E about an axis of rotation 11. A fixation in position D or E can be achieved with a shape 15, in this exemplary embodiment with an approximately triangular locking lug 15 on the circumference of the almost circular rotary stop 10.

The locking element 15 interacts with complementary recesses (not shown). These recesses are, for example, as a quiescent current notch and working current notch in or on the door opener housing 12 at a defined distance, so that the rotary stop 10 can be rotated with a normal commercially available screwdriver so that the detent 15 engages in the quiescent current notch or in the working current notch.

In an advantageous embodiment, the rotary stop 10 is non-rotatably connected to a locking pin 30, and its rotary movement D ↔ E is via an elongated hole 31 in a disc-shaped part 32 of the locking pin 30 and an engaging element (not shown) on the housing 12 or limited to the base plate 3.

On the surface of the rotary stop 10, two peg-like elements 19 are arranged to limit the pivoting movement of the armature 8 which is designed as a pivot bracket.

3 shows the approximately circular sector-shaped configuration of the pins 19. These pins 19 are formed almost diametrically to one another on the surface of the rotary stop 10 and cooperate with the armature 8. Wedge-shaped control surfaces 27 of the armature 8 lie in the effective range of the magnetic coil 13 (FIG. 1).

An arrow 20 in FIG. 2 illustrates the pivoting movement of the armature 8 and the unlocking or locking position brought about by the change 6 and in particular by the change head 17 with regard to the door opener latch 4.

The switching positions, which are achieved by an almost T-shaped interchangeable head 17 in vertical longitudinal section and a square recess 25 in armature 8, are denoted by A, B and C. From these three switching positions A, B and C, which correspond to the unlocked-locked-unlocked position, one switching position and one unlocked switching position is locked with the help of the rotary stop 10.

This blocking with regard to a closed-current door opener and an open-circuit door opener is described in connection with FIGS. 6 to 9.

An anchor 8 is shown in FIG. 4 and a change 6 in FIG. 5. The interchangeable head 17 with an upper horizontal notch 23 and a lower horizontal notch 24 interacts with the recess 25 of the armature 8. In the right unlocked position A (FIG. 2), the switch 6 thus has freedom of movement.

In FIGS. 6 and 7, the rotary stop 10 is in a quiescent current position. These are visible in sections Representation of a quiescent current door opener 2, a coil core 22, which is not energized. The armature 8 is therefore pressed to the right by the armature spring 28.

This position corresponds to position A in FIG. 2 and means that the change 6 holds the door opener latch 4 in an unlocked position. From the rotary stop 10, only an upper pin 19 is visible, which, as is clear from FIG. 7, limits the swiveling movement of the armature 8 to the left after energization of the magnet coil 13. In FIG. 7, the armature 8 and the change 6 are in the central locked position B according to FIG. 2.

8 and 9 show a detail of an electric door opener 2 in a working current version. The rotary stop 10 was rotated about its axis of rotation 11 into the working current position in order to implement a working current door opener, which is clearly evident from the changed position of the pins 19 compared to FIGS. 6 and 7.

FIG. 8 shows the magnet coil 13 in the de-energized state, which is why the armature 8 is in the middle position B according to FIG. 2. The change 6 is held in the recess 25 with its change head 17, which is why the door opener latch 4 is locked.

In FIG. 9, the armature 8 is moved from the coil core 22 to the left unlocked position C according to FIG. 2 as a result of energizing the magnet coil 13, so that the change 6 can slide past the armature 8 in the “open” direction.

Claims (9)

Electric door opener with a change (6) which can be acted upon by an armature (8) and a magnetic coil (13) and which is arranged to be adjustable in order to release or lock a door opener latch (4),
characterized by
that a device (10) is provided for optional type switching between closed-circuit and open-circuit type by means of a three-point armature travel limitation, which defines the one type in one position and the other type in two alternatively adjustable positions. Electrical door opener according to claim 1,
characterized by
that the armature (8) is adjustable to a third position in addition to a change (6) and the door opener latch (4) releasing or locking, and that the device (10) is a closed-circuit or open-circuit operation with two different positions of the armature (8) is adjustable. Electric door opener according to claim 1 or 2,
characterized by
that as a means (10) for switching the armature (8) and with the armature (8) interacting change (6) a rotary stop (10) is provided which is parallel to a pivot axis (16) of the change (6) and a pivot axis (9) of the armature (8) arranged axis of rotation (11) is adjustable. Electric door opener according to claim 3,
characterized by
that the rotary stop (10) for operating current-to-quiescent current switching is provided with a latching element (15) and that in or on a door opener housing (12) or on a base plate (3) complementary recesses in a quiescent current and operating current arrangement for receiving the Locking element (15) are provided. Electrical door opener according to claim 4,
characterized by
that the latching element (15) is formed on the circumference of the rotary stop (10) and is received in quiescent current or working current recesses in the door opener housing (12). Electric door opener according to one of the preceding claims 3 to 5,
characterized by
that the rotary stop (10) is arranged below the armature (8) and is provided with limiting elements (19) which have an unlocking and locking position of the armature (8) and the change (6) in the closed-circuit or open-circuit position of the rotary stop ( 10) allow. Electric door opener according to claim 6,
characterized by
that are provided as limiting elements (19) shaped like a sector of a circle on the surface of the rotary stop. Electric door opener according to one of the preceding claims,
characterized by
that the armature (8) is designed as a swivel lever and has a recess (25) for receiving or locking a replaceable head (17) of the changer (6). Electric door opener according to claim 8,
characterized by
that the interchangeable head (17) is complementary to the recess (25) of the armature (8) and is provided with an upper horizontal notch (23) and a lower horizontal notch (24).

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