EP0431518A2 - Furniture lock - Google Patents

Abstract

The invention relates to a furniture lock (1) made of plastic, which is mounted on a door (2) or the like in an installation orifice (3). A housing (6) having a bolt part (8) prestressed into the closing position by a spring (7) is arranged on the inner face (4) of the door (2), a gripping recess (9) having a rear wall (10) being provided on the outer face (5) of the door (2). Pivotably mounted in the gripping recess (9) is an actuating element (11) which is so connected operatively to the bolt part (8) by means of a push lever (12) that, during the pivoting of the actuating element (11), the bolt part (8) is retracted in the opening direction counter to the spring prestress. When the furniture lock (1) is being mounted in the installation orifice (3), the gripping recess (9) is connected to the housing (6) via connecting elements (13). The housing (6) together with the spring (7) and the bolt part (8) is designed as a first one-piece plastic part (14). The gripping recess (9) together with its rear wall (10), the actuating element (11) and the push lever (12) is designed as a second one-piece plastic part (15).

Description

The invention relates to a furniture lock made of plastic, which od. is mounted in an installation opening, on the inside of the door a housing with a locking part biased by a spring in the closing direction is arranged and on the outside of the door a recessed handle recess is provided, in which an actuating element is pivotally mounted, which with a push lever is operatively connected to the locking part in such a way that when the actuating element is pivoted, the locking part is retracted against the spring preload in the opening direction and the recessed grip is also connected to the housing via connecting elements during the assembly of the furniture lock in the installation opening.

Such furniture locks, which are also used in particular in camping vehicles of all types, are generally known as so-called "snap locks", the actuating element being formed in many cases by the handle bar of the recessed grip, so that when pulling to open the door or the like, the same time Bolt is pushed back.

Known furniture locks of this type, as are generally available on the market, use a relatively large number of individual parts. For example, the actuating element is mounted on a separately insertable axis in the recessed grip. The bolt and spring are also usually manufactured as individual parts and in the Lock housing used. A number of screws are usually used to connect the recessed grip, which also contains a separate rear wall, which is also to be assembled as an individual part, and is screwed into the corresponding holes in the recessed grip from the housing side. Due to the large number of individual parts and the type of connection between the recessed grip and the housing, the assembly and installation of such known furniture locks is a comparatively labor-intensive process. In addition, both the manufacture and the position of the necessary individual parts are cumbersome.

In other types of furniture locks, such as three-bolt locks, it is known from DE-OS 26 05 427 to press the lock housing consisting of many individual parts directly into the installation opening from the rear of the door and to fasten it there by means of a harpoon-shaped central pin. The central pin also serves as a key guide, so that only a corresponding bezel is attached to the front of the door.

From DE-GM 75 23 149 a caravan lock is also known, in which the lock consists of two main parts, which in turn are made from a large number of individual parts. One of the main parts is arranged on the inner surface of the door, while the other counterpart, which forms the handle mounting, is embedded on the opposite side of the door. The two parts are connected to each other in a cylindrical and comparatively precise entry opening in that the jacket of the inner end of the cylinder housing fastened in a twist grip has a plurality of toothed longitudinal ribs which engage in corresponding formations of the opposite lock part. This makes it possible to install such a lock in doors of different wall thicknesses.

Starting from a furniture lock of the type mentioned, the object of the invention is to manufacture it from as few individual parts as possible and thus to considerably facilitate the assembly and installation of such a furniture lock without its functionality and, inter alia, also the ability to operate in doors of various strengths to be installed, is reduced.

This object is achieved in that the housing with the spring and the locking part is formed as a first one-piece plastic part and that the recessed grip with the rear wall of the actuating element and the push lever is designed as a one-piece second plastic part.

It is obvious that with this type of design the complete furniture lock consists of two individual parts, which can be assembled into a complete lock by simple manipulations.

In a preferred embodiment according to the invention, the connecting elements are integrally formed as a complementarily shaped, positive locking device on the housing and the recessed grip on surfaces of the housing and the recessed grip which are opposite one another in the installed position of the furniture lock. In this way, when installing the furniture lock, it is achieved that again no loose individual parts are to be used, but that the furniture lock according to the invention can be installed by simply pressing it together over the installation opening.

In particular, the invention can be further developed in that the spring is provided at its end opposite the connection with the locking part with a support plate and that the support plate is connected via a film hinge to a wall of the housing in such a way that the spring with the locking part can be pivoted into the interior of the housing for assembly. In other words, the functional locking part of the furniture lock during assembly made that by compressing the plastic spring this is simply folded together with the locking part in the housing.

The guide for the locking part is preferably formed by wall sections extending from the bottom of the housing. The latch is folded between them during assembly.

In a particularly preferred embodiment of the invention it is provided that the rear wall is connected to a side wall of the recessed grip via a film hinge in such a way that the rear wall can be pivoted for mounting on the lower edges of the side walls of the recessed grip. This also makes it possible to mount the recessed grip by simply pivoting the rear wall.

It is further preferred that the rear wall can be fixed on the lower edges of the recessed grip, it being provided in a preferred embodiment according to the invention that the rear wall can be snapped onto the lower edges by means of locking strips. This ensures that the recessed grip is designed to be easy to handle during assembly and that it is not necessary to hold the rear wall in place in any way during assembly.

In a particularly preferred embodiment according to the invention, the actuating element is connected to the recessed grip by a hinge which is formed by a notch which linearly weakens the wall thickness.

In the embodiment according to the invention described so far, it is obvious that by connecting all of the movable parts, either during assembly or when using movable hinges formed by the plastic itself, an extremely simple design of the shapes required for production is possible, since both the recessed grip and also the housing with its functional elements in an extended, extended position - made of plastic can be sprayed, so that complicated undercuts can be omitted. The more complex structure of the two individual parts is achieved by pivoting the corresponding sections.

According to this basic idea, it is further preferred to establish the operative connection between the actuating element and the locking part by the engagement of the free end in a recess in the locking part in a clearance fit. This on the one hand achieves a simple design and on the other hand also facilitates installation, since a special connection of the push lever to the locking part is not required.

In a particularly preferred embodiment according to the invention it is further provided that the locking devices forming the connecting elements consist of a number of spring tongues formed on the housing with sawtooth-shaped teeth and corresponding counter-teeth on the recessed grip.

The teeth are preferably arranged on the side of the spring tongues facing the center of the housing and the counter teeth are formed on the outside of the side walls of the recessed grip.

Furthermore, it is particularly preferred that the spring tongues are arranged opposite one another and at a distance inwards opposite two side walls of the housing.

It is particularly advantageous to provide at least two, preferably four spring tongues on each of the two side walls.

In particular, the invention can be further developed in that, in the case of spring tongues lying next to one another in pairs, the toothing of one spring tongue against the toothing of the adjacent spring tongue by half the tooth pitch in the longitudinal direction the spring tongue is offset.

In this way it is achieved, for example, if the pitch of the toothing and the counter toothing is 1 mm, that tolerances of the thickness of the door or the like can be compensated for in steps of 0.5 mm, a spring tongue of a pair then engaging with the counter toothing stands on the recessed grip. As a result, the gears can be made correspondingly stronger despite the minimal gradation in tolerance compensation, so that a secure hold of the housing and recessed grip is ensured.

To facilitate assembly, it is also preferred to provide mating guide pins and corresponding guide bores on the recessed grip and the housing, which ensure that the two parts are moved towards one another in the correct orientation when they are positioned over the installation opening of a door . Like. Be installed. The installation is done by simply pressing the two parts together.

Fig. 1

die Vorderansicht einer Tür od. dgl. mit einem erfindungsgemäßen Möbelschloß;

Fig. 2

eine schematische Schnittansicht längs der Linie II-II von Fig. 1;

Fig. 3

eine Ansicht des Möbelschlosses in der Tür in Richtung des Pfeiles III von Fig. 1;

Fig. 4

eine Schnittansicht längs der Linie IV-IV von Fig. 1;

Fig. 5

eine Draufsicht auf den offenen Gehäuseteil in der Ebene V-V von Fig. 4;

Fig. 6

eine Draufsicht auf die Griffmulde in einem Zustand, wie sie nach dem Spritzgießen vorliegt;

Fig. 7

eine Unteransicht der Griffmulde gemäß Fig. 6;

Fig. 8

eine Draufsicht auf das Gehäuse in einem Zustand, wie dieses die Spritzgießmaschine verläßt;

Fig. 9

eine Schnittansicht längs der Linie IX-IX von Fig. 8;

Fig. 10

eine Schnittansicht längs der Linie X-X von Fig. 8;

Fig. 11

eine Ansicht in Richtung des Pfeiles XI von Fig. 9;

Fig. 12

eine Schnittansicht längs der Linie XII-XII in Fig. 6;

Fig. 13

in etwa 10-fach vergrößertem Maßstab die Einzelheit XIII von Fig. 12;

Fig. 14

eine teilweise aufgebrochene Seitenansicht in Richtung des Pfeils XIV von Fig. 6;

Fig. 15

die Einzelheit XV von Fig. 14 in etwa 10-fach vergrößertem Maßstab und

Fig. 16

die Ansichten A und B der Federzungen in der in Fig. 9 mit den Pfeilen A und B dargestellten Richtungen, ebenfalls in etwa 10-fach vergrößertem Maßstab.

The invention is explained in more detail below with reference to an embodiment illustrated by way of example in the drawings. It shows:

Fig. 1

the front view of a door or the like. With a furniture lock according to the invention;

Fig. 2

is a schematic sectional view taken along line II-II of Fig. 1;

Fig. 3

a view of the furniture lock in the door in the direction of arrow III of Fig. 1;

Fig. 4

a sectional view taken along line IV-IV of Fig. 1;

Fig. 5

a plan view of the open housing part in the plane VV of Fig. 4;

Fig. 6

a plan view of the recessed grip in a state as it is after injection molding;

Fig. 7

a bottom view of the recessed grip according to FIG. 6;

Fig. 8

a plan view of the housing in a state as it leaves the injection molding machine;

Fig. 9

a sectional view taken along line IX-IX of Fig. 8;

Fig. 10

a sectional view taken along line XX of Fig. 8;

Fig. 11

a view in the direction of arrow XI of Fig. 9;

Fig. 12

a sectional view taken along the line XII-XII in Fig. 6;

Fig. 13

the detail XIII of Fig. 12 on an approximately 10-fold enlarged scale;

Fig. 14

a partially broken side view in the direction of arrow XIV of Fig. 6;

Fig. 15

the detail XV of Fig. 14 on an approximately 10 times enlarged scale and

Fig. 16

the views A and B of the spring tongues in the directions shown in Fig. 9 with the arrows A and B, also on an approximately 10 times enlarged scale.

The furniture lock 1 illustrated in the drawings, which is made of plastic, is illustrated in FIGS. 1 to 5 installed on a door 2 or the like above an installation opening 3. The furniture lock 1 bridges the inside 4 of the door and the outside 5 thereof through the installation opening 3.

On the inside 4 of the door 2, a housing 6 is arranged, which is biased by a spring 7 in the closing direction Tes locking member 8, which projects laterally from the housing 6 in the biased closed position.

On the front, i.e. on the outside 5 of the door 2 there is a recessed grip 9 which is partially closed by a rear wall 10. An actuating element 11 is pivotally mounted in the recessed grip 9 and is connected to the locking part 8 via an integrally molded thrust lever 12.

The arrangement is such that the actuating element 11 practically forms the grip bar of the recessed grip 9, so that when the door is opened, the actuating element 11 is first pivoted outward and thereby moves the locking part 8 into the housing 6 via the push lever 12, so that the door can be opened.

The two main parts of the furniture lock, i.e. the housing 6 and the recessed grip 9 are connected to one another via connecting elements generally designated 13 and cover the installation opening 3 on both sides.

According to the invention, the housing 6 is designed together with the spring 7 and the locking part 8 as an integral plastic part 14.

Likewise, the recessed grip 9, together with the rear wall 10 and the actuating element 11, on which the thrust lever 12 is molded, forms an integral second plastic part 15, which is connected to one another by the connecting elements 13 in the installation position shown in detail in FIGS. 1 to 5 .

As shown, the connecting elements 13 are designed as complementarily shaped, form-fitting latching devices 16, which are also integrally formed on the mutually opposite surfaces 17 and 18 of the housing 6 or the recessed grip 9. In the following, reference is first made to FIGS. 6 to 16, on the basis of which the preferred starting shape of the housing 6 and the recessed grip 9 are described, as they are designed for the simplest possible production by injection molding.

The housing 6, which is shown in more detail in FIGS. 8 to 11 and 16, is formed in one piece with the connecting elements 13, the spring 7 and the locking part 8. The spring 7 is integrally formed on the locking part 8 with one end 19 and has a support plate 21 which is also integrally formed on its opposite end 20.

The housing 6 has side walls 22, 23, 24 and 25 and a bottom 26, which together enclose an interior space 27, which in the illustrated embodiment has the shape of a bowl.

The support plate 21 at the end 20 of the spring 7 is connected via a film hinge 28 to the side wall 23 of the housing 6, whereby, as can be seen in particular from FIG. 9, the spring 7 with the locking part 8 attached to it for mounting the furniture lock 1 in the interior 27 of the housing 6 can be pivoted away over the side wall 23, in order then to assume the position illustrated in FIGS. 4 and 5 together with the locking part 8. Here, the spring 7 is compressed at the same time.

As shown in FIG. 4, the locking part 8 is held with a stop 56 formed on its underside behind a stop 57 formed on the bottom 26 of the housing 6. After this simple pivoting movement of the unit consisting of the spring 7 and the locking part 8 into the interior 27 of the housing, the part of the furniture lock 1 which forms the actual locking device is already fully functional and only has to be connected to the recessed grip 9.

The guide 29 for the locking part 8 is in this case formed by upstanding wall sections 30, 31, 32 and 33 starting from the bottom 26 of the housing 6, of which the wall sections 30 and 31 take over the lateral guidance of the locking part 8, while the wall sections 32 and 33 form the guides on which the bolt part 8 slides with its back.

The recessed grip 9 illustrated in its state as it leaves the injection molding machine in FIGS. 6, 7 and in details 12 to 15 has side walls 34, 35, 36 and 37. A film hinge 38 is formed on the side wall 38 of the recessed grip 9, which is illustrated in a greatly enlarged manner in FIG. 13. The rear wall 10 is also integrally connected to the recessed grip 9 via the film hinge 38 and can be pivoted against the lower edges 39, 40, 41 and 42 of the side walls 34, 35, 36 and 37 in order to mount the recessed grip 9.

After this pivoting process of the rear wall 10, it can preferably be fixed on the lower edges 39, 40, 41 and 42, with locking strips 43 being provided for this purpose in the illustrated embodiment, on which the rear wall 10 can snap.

The actuating element 11 is also connected in one piece to the recessed grip 9 by a hinge 44, which is similar to a film hinge, but is made stronger due to the frequency of actuation.

As illustrated, the hinge 44 is formed by a notch 45 which linearly weakens the wall thickness of the recessed grip 9 at this point. The notch 45 here has an angle on the order of approximately 90 ° between its two side surfaces 58 and 59, so that these side surfaces 58 and 59 simultaneously represent a limitation for the pivoting movement of the actuating element 11.

As already mentioned above, the operative connection between the actuating element 11 and the locking part 8 produced in that the free end 46 of the push lever 12 engages in a recess 47 formed on the locking part 8 from above or from the outside 5 of the door 2 in a clearance fit. Consequently, when the recessed grip 9 is joined to the housing part 6, the drive of the locking part 8 via the push lever 12 becomes functional at the same time.

As can be seen from FIGS. 6 to 16, due to the described and illustrated spatial design of the individual parts of the furniture lock 1, these can be produced with minimal molding costs, since they can be injection molded practically in an exploded arrangement and with minimal parting planes.

As further shown, the locking devices 16 forming the connecting elements 13 consist of a number of spring tongues 47 and 48 formed on the housing 6, which on their side pointing towards the center of the housing 6 with sawtooth-like toothing 49 and 50 illustrated on an enlarged scale in FIG. 6 are trained.

The associated counter-teeth 51 and 52 are formed on the outside of the side walls 36 and 39 of the recessed grip and are illustrated in a greatly enlarged scale in FIG. 15.

In the illustrated embodiment, the teeth 49 and 50 and the counter teeth 51 and 52 on the recessed grip 9 have a pitch on the order of 1 mm.

The spring tongues 47 and 48 are also integrally formed on opposite sides at a distance from the associated side walls 22 and 24 of the housing 6.

At least two such spring tongues 47 and 48 are arranged on each of the two side walls 22 and 24, with four such springs in the preferred embodiment tongues 47 and 48 are provided.

Each spring tongue 47 forms a pair with a spring tongue 48, the spring tongues 47 and 48 therefore being arranged in pairs next to one another.

Here, the toothing 49 of one spring tongue 47, as illustrated in FIG. 16, is offset from the toothing 50 of the adjacent spring tongue 48 by half a tooth pitch in the longitudinal direction of the spring tongues.

This arrangement ensures that if, for example, as shown, the pitch of the toothings 47 and 48 and the counter toothing 51 and 52 is 1 mm for reasons of strength, the spacing between the recessed grip 9 and the housing 6 is nevertheless stepped in steps of 0, 5 mm is possible, with only one of the spring tongues 47 or 48 being in engagement with the corresponding counter toothing 51, 52, as is indicated in FIG. 2.

As further shown in the drawings, 9 guide devices are provided on the housing 6 and the recessed grip, which facilitate the assembly of the two parts. In the illustrated embodiment, this is a guide pin 53, which can be inserted into a guide bore 54.

For the sake of completeness, reference is made to a preferred detail with regard to the design of the spring 7. As shown in FIGS. 4 and 5, the spring 7 is preferably formed by a corrugated preformed wall section 55 which has the same height as the locking part 8. On the one hand, this increases the spring force possible in the available space and, on the other hand, supports safe guidance of the locking part 8 by the wall section 55, which forms the spring 7, also being guided by the guide 29, which is guided through the wall sections 30, 31, 32 and 33 is formed.

All of the features and advantages of the invention, including constructive details and spatial arrangements, resulting from the description, the claims and drawings can be essential to the invention both individually and in any combination.

Claims (10)

Furniture lock made of plastic, which is mounted on a door or the like in an installation opening, on the inside of the door a housing is arranged with a locking part biased by a spring in the closing direction and on the outside of the door a recessed handle recess is provided is in which an actuating element is pivotally mounted, which is operatively connected to the locking part with a push lever such that when the actuating element is pivoted, the locking part is retracted against the spring preload in the opening direction and, furthermore, the recessed grip with the housing via connecting elements during the assembly of the Furniture lock is connected in the installation opening, characterized net gekennzeich in that the housing (6) is formed with the spring (7) and the bolt part (8) as a first one-piece plastic part (14), and in that the recessed grip (9) with the rear wall ( 10), the actuating element (11) and the thrust lever (12) as one-piece second plastic part is formed. Furniture lock according to claim 1, characterized in that the connecting elements (13) as a complementary shape conclusive locking devices (16) on the housing (6) and the recessed grip (9) on in the installed position of the furniture lock (1) opposite surfaces (17, 18) of the housing (6) and the recessed grip (9) are integrally formed that the spring (7) is provided at its end (20) opposite the connection with the locking part (8) with a support plate (21), and that the support plate (21) via a film hinge (28) in this way with a wall (23) of the Housing (6) is connected so that the spring (7) with the locking part (8) for mounting in the interior (27) of the housing (6) can be pivoted. Furniture lock according to claim 1 or 2, characterized in that the guide (29) for the locking part (8) is formed by wall sections (30, 31, 32, 33) starting from the bottom (26) of the housing (6). Furniture lock according to one of the preceding claims, characterized in that the rear wall (10) is connected to a side wall (37) of the recessed grip (9) via a film hinge (38) such that the rear wall (10) is mounted on the lower edges (39 , 40, 41, 42) of the side walls (34, 35, 36, 37) can be pivoted such that the rear wall (10) on the lower edges (39, 40, 41, 42) of the side walls (34, 35, 36, 37) can be fixed, and that the rear wall (10) by means of locking strips (43) on the lower edges (39, 40, 41, 42) can be snapped. Furniture lock according to one of the preceding claims, characterized in that the actuating element (11) is connected to the recessed grip (9) by a hinge (44) which is formed by a notch (45) which linearly weakens the wall thickness. Furniture lock according to one of the preceding claims, characterized in that the operative connection between the actuating element (11) and the locking part (8) by the engagement of the free end (46) of the push lever (12) in a recess (47) in the locking part (8) is made in game fit. Furniture lock according to one of the preceding claims, characterized in that the latching devices (16) forming the connecting elements (13) consist of a number of spring tongues (47, 48) formed on the housing (6) with sawtooth-shaped teeth (49, 50) and corresponding counter-teeth (51, 52) on the recessed grip (9), that the teeth (49, 50) are arranged on the side of the spring tongues facing the center of the housing (6), that the counter teeth (51, 52) on the outside of the side walls (36, 39) of the recessed grip (9) are formed, and that the spring tongues (47, 48) are arranged opposite one another and at a distance inwards opposite two side walls (22, 24) of the housing (6). Furniture lock according to claim 7, characterized in that at least two, preferably four spring tongues (47 and 48) are provided on each of the two side walls (22, 24), and in the case of spring tongues (47, 48) lying next to one another in pairs, the toothing (49) one spring tongue (47) is offset from the toothing (50) of the adjacent spring tongue (48) by half the tooth pitch in the longitudinal direction of the spring tongues. Furniture lock according to claim 7 or 8, characterized in that the pitch of the teeth (49, 50) and the counter teeth (51, 52) is 1 mm. Furniture lock according to one of the preceding claims, characterized in that mating guide pins (53) and guide bores (54) are provided on the recessed grip (9) and the housing (6).

Images