EP1842992A2 - Bonnet lock - Google Patents

Abstract

The lock has a primary locking device comprising a locking pin (10) that is operatable with a Bowden cable, and a secondary locking device provided for a closing retainer (7). The secondary locking device has a rotatable safety catch (4) that is formed as a single piece with a catching hook. A leg spring is provided for rotating the safety catch and is supported at a lock housing (1), where the safety catch has a recess (6) for accommodating the retainer and a stop that works against the spring.

Description

Hood locks for locking hoods or hoods of a motor vehicle are well known. If hood locks can be unlocked on the front edge of the hood, they must be secured by a second locking mechanism, provided that they are hinged at the rear. If the driver wants to open the hood, he unlocks the hood in a first step. As a result, a primary fuse is overridden by a mounted on the bonnet striker is released. To overcome the secondary fuse, a secondary fishing hook fastened to the striker is to be pivoted between the front of the body and the underside of the bonnet, whereby the bonnet is opened.

When mounting the bonnet, the striker is attached to the bonnet and painted. The secondary fishing hook for manual opening of the hood is not yet mounted. The reason is that the paint would penetrate into the pivot axis of the secondary fishing hook and partially bond this area. In the subsequent use of the secondary catch it would then come to paint breaks. Therefore, after the painting process, the secondary fishing hook is mounted with the bonnet open by a worker in an overhead job.

The DE 103 00 640 A1 describes a device for securing the hood of a motor vehicle. It consists of a lock with catch, pawl and Bowden cable. By a special contouring of the pawl, a Bowden cable can be mounted in both left-hand and right-hand drive vehicles. When pulling on the Bowden cable, the pawl releases the catch. A return spring pivots the catch and releases the lock completely. The device does not have a secondary lock.

Based on the above-mentioned prior art, it is the object of one embodiment of the invention to provide a hood lock, which ensures a reduced installation effort while improving protection for pedestrians in a traffic accident.

The solution of this object is achieved by the features of the independent claims. Advantageous developments are represented by the features of the dependent claims.

A first embodiment of the invention relates to a hood lock for securing the hood of a motor vehicle. The hood lock has a primary lock and a secondary lock for a cooperating with the hood lock striker and is thus for the rear hinged hoods suitable. The secondary locking in this case comprises a rotary latch and a catch hook, wherein the catch and catch hooks are integrally formed.

Opposite hood locks with separate catch and (secondary) fishing hook reduces in the one-piece design, the number of required parts, simplifies the extent of the design of the hood lock and reduces the number of possibly non-functioning components.

The one-piece design of fishing hook and catch brings with it that the fishing hook is designed to be movable. If, for example, a pedestrian strikes the bonnet lock area against the bonnet due to an accident, this reduces the risk of injury compared with a bonnet lock with a rigid catch hook. A rigid, mounted on the bodywork front and upwards fishing hooks namely inherently poses a risk of injury when the located above such a fishing hook plate of the hood is already pressed.

The fishing hook is also designed body side movable, ie is not connected to the hood moving part. This facilitates the assembly of the hood lock in the manufacture of the vehicle, because the connected to the hood part of the hood lock with the striker is rigid and can therefore be painted with the hood as a unit. Subsequent mounting movable and to be fixed to the hood parts of the hood lock after painting thus eliminated.

In one embodiment of the hood lock, a first spring for rotating the rotary latch is provided and the rotary latch has a first spring counteracting the first stop. The first spring rotates the catch out of a closed position and experiences in a certain rotary latch position the counteraction of the first stop, or is rendered powerless by the first stop. In this position, the primary fuse is overcome, but secures the secondary fuse in the form of the catch hook the striker.

In one embodiment of the hood lock, the position of the first stop is selected such that the first stop of the first spring counteracts in such a rotary latch position in which an associated striker is detectable by the catch hook. The first spring is therefore powerless when the associated striker is detected by the fishing hook. By this choice prevents a force of the first spring against the fishing hook inadvertently opens it.

A realization of the counteracting of the first stop against the first spring according to a further embodiment is that the first spring is a leg spring which is supported on a lock housing, and the rotary catch has a laterally projecting first stop. The first stop, since laterally projecting, abuts during a rotational movement of the rotary latch against the legs supported on the lock housing and makes the leg spring thereby powerless.

A position selection within the meaning of the penultimate paragraph is made according to one embodiment such that the first stop then abuts in a rotary latch position against the supporting legs of the leg spring, when an associated striker is detected by the fishing hook.

In another embodiment, the hood lock has a second spring which counteracts the first spring. The second spring is used during the closing process that the fishing hook detects the inserted into the catch locking striker.

In a further embodiment, the torque exerted by the first spring on the rotary latch is greater than that of the second spring. This ensures that the primary lock can be overcome at all by means of the first spring.

In a further embodiment of the hood lock, the second spring is a leg spring fixed to a lock housing, and the rotary latch has a laterally projecting second stop.

A realization of the embodiment of the last paragraph is that the position of the second stop is selected so that the second stop abuts in the closed position of the hood lock against a leg of the leg spring.

Incidentally, the hood lock may have a primary locking, which comprises an actuatable with a Bowden pawl.

Figur 1

zeigt die Schließposition einer Ausführungsform des Haubenschlosses in einer Rückansicht,

Figur 2

zeigt das Haubenschloss der Figur 1 in einer Frontansicht,

Figur 3

zeigt das Haubenschloss der Figur 1 in einer perspektivischen Seitenansicht,

Figur 4

zeigt das Haubenschlosses der Figur 1 in einer Rückansicht nach Entsperren der Primärveriegelung,

Figur 5

zeigt das Haubenschlosses der Figur 1 in einer Vorderansicht nach einem Entsperren der Primärveriegelung,

Figur 6

zeigt das Haubenschlosses der Figur 1 in einer perspektivischen Seitenansicht nach Entsperren der Primärveriegelung,

Figur 7

zeigt das Haubenschlosses der Figur 1 in einer Rückansicht nach Entsperren der Sekundärveriegelung,

Figur 8

zeigt das Haubenschlosses der Figur 1 in einer Vorderansicht nach einem Entsperren der Sekundärveriegelung.

Other features and advantages of the claimed The invention will become apparent from the following detailed description with reference to the accompanying drawings, given below by way of non-limitative example. Here, the use of reference numerals in the figures should not be understood to the effect that the reference numerals are intended to limit the scope of the claimed invention. It shows

FIG. 1

shows the closed position of an embodiment of the hood lock in a rear view,

FIG. 2

shows the hood lock of Figure 1 in a front view,

FIG. 3

shows the hood lock of Figure 1 in a perspective side view,

FIG. 4

shows the hood lock of Figure 1 in a rear view after unlocking the primary seal,

FIG. 5

shows the hood lock of Figure 1 in a front view after unlocking the primary seal,

FIG. 6

shows the hood lock of Figure 1 in a perspective side view after unlocking the primary seal,

FIG. 7

shows the hood lock of Figure 1 in a rear view after unlocking the secondary locking,

FIG. 8

shows the hood lock of Figure 1 in a front view after unlocking the secondary locking.

Figure 1 shows an embodiment of the hood lock in a rear view, in its closed position. The hood lock has a lock housing 1, which has two inner walls 2 and 3. A rotary latch 4 is rotatably mounted about a bolt 5 fixed to the housing. The rotary latch 4 has a recess 6 for receiving the associated striker 7. Above the recess 6, the catch has the shape of a fishing hook 8. Accordingly, catch 4 and fishing hooks 8 are integrally formed.

FIG. 1 shows the hood lock in its closed position. A return spring 9 presses in a known manner a pawl 10 in the recess 6 of the rotary latch 4 and prevents rotational movement in a clockwise direction.

Pulls the driver of a vehicle equipped with this hood lock vehicle on Bowden cable 11 to the left, so the pawl 10 releases the catch 4. Thus, the primary lock of the locking pin 7 is disabled. Due to the spring force of the support against the inner wall 3 first spring 12, a leg spring, the rotary latch 4 rotates clockwise.

FIG. 2 shows the hood lock of FIG. 1 in a front view. One recognizes a second spring 13, designed as a leg spring whose left leg is fixed to the housing, and whose right leg 19 can be detected by a second stop 14 of the rotary latch 4. Of the second stop 14 is laterally from the rotary latch 4 and shows in Figure 2 opposite to the viewer. Turns the catch 4 of Figure 1 in a clockwise direction, this means in Figure 2, a compression of the second spring 13 in the counterclockwise direction. To ensure this movement when opening the hood lock, the torque of the second spring 13 is smaller than the torque of the first spring 12th

FIG. 3 shows the hood lock of FIG. 1 in a perspective side view. Here recognizes particularly well the rearwardly projecting second stop 14, but also the forwardmost first stop 15, whose operation will be explained in more detail below with Figures 4 to 6.

Figure 4 shows the rear view of the hood lock of Figure 1 with an unlocked primary lock and with a position of the rotary latch 4, which is offset from the position of Figure 1 by approximately 45 ° clockwise. In this position, the first stopper 15 counteracts the leg 18 of the first spring 12 which is supported on the inner wall 3 by abutting it and thereby rendering it powerless. The position of the first stop 15 is in this case selected so that the first stop 15 of the first spring 12 counteracts in such a rotary latch position in which the associated striker 7 from the fishing hook 8 can be detected. The striker 7 therefore remains secured.

FIG. 5 is a front view of the hood lock shown in FIG. It can be seen that the second stop 14 has rotated the right leg 19 of the second spring 13 by approximately 30 ° in the counterclockwise direction. The thus constructed spring tension causes the recess 6 facing inner Fanghakenkontur 16 in this position is pressed against the locking pin 7, see. FIG. 6. This ensures, in conjunction with the selected inner catch hook contour 16, that the striker 7 remains secured, and that the bonnet attached to it can not be released from the catch hook 8 by external forces, eg due to wind or an uneven road surface.

FIG. 6 shows the hood lock of FIG. 4 in a perspective side view. It can be seen in particular that the first stop 15 takes the right leg 18 of the first spring 12 and thereby makes them powerless.

By manually actuating the rotary latch 4 on the hood, for example, with an acting on the catch 4 (not shown) lever, the secondary latch, comprising the integrally formed with the catch hook 8 rotary latch 4 in the position of Figure 7 (rear view) or 8 (front view) brought. The bonnet can now be swiveled freely. If it is closed again, causes the outer fishing hook contour 17, ie that contour of the fishing hook 8, which is opposite in the closed position of the pawl 10, that the rotary latch 4 of Figure 7 is rotated counterclockwise. Reached the locking pin 7, the recess 6, the second spring 13 causes a further movement of the rotary latch 4 in the counterclockwise direction, whereby the fishing hook 8 lays with its inner catch hook contour 16 on the striker 7 and this secures.

LIST OF REFERENCE NUMBERS

01

lock housing

02

inner wall

03

inner wall

04

catch

05

bolt

06

recess

07

striker

08

hook

09

Return spring

10

pawl

11

Bowden

12

first spring

13

second spring

14

second stop

15

first stop

16

inner catch hook contour

17

outer catch hook contour

18

leg

19

leg

Claims (10)

Hood lock for securing the hood of a motor vehicle, comprising a primary latch (10, 11) and a secondary latch for a striker (7) to be secured, the secondary latch comprising a catch (4) integrally formed with a catch hook (8). Hood lock according to claim 1, wherein a first spring (12) is provided for rotating the rotary latch, and wherein the rotary latch has a first stop (15) counteracting the first spring. Hood lock according to claim 2, wherein the position of the first stop is selected such that the first stop of the first spring counteracts in a rotary latch position when an associated striker is detectable by the catch. Hood lock according to claim 2, wherein the first spring is a leg spring which is supported on a lock housing (1), and the rotary latch has a laterally protruding first stop. Hood lock according to claim 3, wherein the position of the first stop is selected so that the first stop abuts in a rotational latch position against the supporting leg (18) of the leg spring, if an associated striker from the fishing hook is detectable. Hood lock according to one of the preceding claims, wherein a second spring (13) is provided, which counteracts the first spring. Hood lock according to one of the preceding claims, in which the torque exerted by the first spring on the rotary latch is greater than that of the second spring. Hood lock according to one of the preceding claims, wherein the second spring is a leg spring fixed to a lock housing, and the rotary latch has a laterally projecting second stop (14). Hood lock according to claim 8, wherein the position of the second stop is selected so that the second stop abuts in the closed position of the hood lock against a leg (19) of the leg spring. Hood lock according to one of the preceding claims, in which the primary lock comprises a pawl (10) which can be actuated by a Bowden cable (11).

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