DE102011086186A1 - Gas generator, particularly for vehicle, is provided with gas storage tank and housing having drive and movable pusher element which in moved from starting position into end position - Google Patents

Abstract

The gas generator (100,100a) is provided with a gas storage tank (2) and a housing (5) having a drive (1) and a movable pusher element (8) which in moved from a starting position into an end position in response to a release signal by the drive. A piercing element (8) penetrates the breakthrough plate (6). An electromagnetic actuator (10) moves a retaining element (30) in response to the release signal.

Description

State of the art

The invention relates to a gas generator, in particular for a vehicle, according to the preamble of independent claim 1.

In the prior art, various known principles of gas generation are used for the filling of an airbag or airbag. For example, pyrotechnically generated gases can be used to fill an airbag or airbag. Disadvantages of pyrotechnics result from a correspondingly complex security concept and the cost-intensive design of the airbag or airbag due to the resulting hot gases.

Alternatively, a gas pressure vessel can be pierced, for example, by means of a pyrotechnic trigger, wherein the gas escaping from the gas pressure vessel fills the airbag or airbag. Here, too, results from the pyrotechnics used a correspondingly complex security concept. Such a gas generator for an airbag module, for example, in the published patent application DE 101 14 020 A1 described.

Furthermore, from the published patent application DE 10 2007 003 320 A1 Gas pressure vessel known, which are sealed by a solenoid valve. If necessary, the solenoid valve is opened and the outflowing gas fills the airbag or airbag. A disadvantage could be considered here that the gas-tightness over the life of the gas pressure vessel is extremely difficult to ensure, so that the function may not be guaranteed in case of need.

In the patent DE 199 51 672 C2 For example, a hybrid gas generator having an ignition device, a pyrotechnic solid charge arranged in a combustion chamber and a storage gas located in a container closed with a bursting device, which have a common longitudinal axis, are described. The bursting device is designed so that it bursts under the pressure of the storage gas, if it is not additionally supported by a support means with an abutment axially against the container internal pressure. The support device is at least partially destroyed by the pressure generated by the pyrotechnic solid charge during combustion, so that a bursting of the bursting direction is no longer opposed. By bursting the bursting means the outlet of the storage gas tank is opened and the storage gas can escape and fill a corresponding airbag or airbag.

In the published patent application DE 103 46 372 A1 For example, a gas generator for an airbag module will be described. The gas generator described comprises a storage gas container for receiving the storage gas with an outlet which is closed by a bursting device. The bursting device is designed so that it breaks under the pressure of the storage gas, if it is not additionally supported by a support device with an abutment against the internal pressure of the container. Furthermore, a pyrotechnic charge is provided, which is contained in a radially arranged to the longitudinal axis of the storage gas tank pyrotechnic assembly and the ignition of a gas is released by which the abutment is moved so that it releases an axially acting on the bursting support member and this a collapse of the bursting direction is no longer contrary. By bursting the bursting means the outlet of the storage gas tank is opened and the storage gas can escape and fill a corresponding airbag or airbag.

Disclosure of the invention

The gas generator according to the invention, in particular for a vehicle, with the features of independent claim 1 has the advantage that cold gas for filling a media consumer, such as an airbag or airbag, with high availability without pyrotechnics or valve technology can be provided. To provide the filling gas, a mechanical accumulator is used as the drive, which comprises, for example, a prestressed spring element which is expanded as required for electromagnetic release. The energy stored in the mechanical memory serves to pierce a storage gas tank and to fill the media consumer with the cold gas escaping from the storage gas tank. The pressure in the media consumer sensibly regulates a series-connected valve, which has no leakage requirements over the life in the idle state of the device.

By the generated cold gas is in the application of the gas generator according to the invention in an airbag system in an advantageous manner, the use of a less temperature-resistant, less expensive airbag material possible. In addition, can be implemented over a long life by the storage gas tank without valve extremely good tightness and a very high gas availability, resulting in a high availability in case of need advantageously. Preferably, the mechanical memory can be designed as a small-sized spring store, which also has a very high energy availability over a long time Lifetime and high reliability in case of need allows. Due to low required performance, an electromagnet can be used as the electromagnetic actuator. By embodiments of the present invention, the pyrotechnics can be completely eliminated, so that advantageously result in a greatly reduced security risk and reduced security requirements. As a result, the gas generator according to the invention can be produced more cost-effectively than conventional gas generators. To limit the pressure in the storage gas tank, for example, at high temperatures in case of fire, a pressure relief valve can be arranged as a low-cost standard assembly on the pressure accumulator. The pressure limiting valve DBV is thus not integrated in the triggering mechanism, thereby keeping the structure of the storage gas tank simple.

Embodiments of the present invention provide a gas generator, in particular for a vehicle, comprising a storage gas container having a housing and a housing piercing plate, a drive and a movable piercing element which, in response to a release signal by the drive from an initial position in an end position can be moved in which the piercing member punctures the piercing plate, the gas stored in the storage gas container escaping through the pierced piercing plate from the storage gas container to a port to which a media consumer can be connected. According to the invention, the drive is designed as a mechanical memory, the stored energy is retained in the initial position of restraint means, wherein an electromagnetic actuator moves the retaining means in response to the release signal in a release position in which the energy stored in the mechanical memory is released and drives the piercing element and moved from the starting position to the end position.

The measures and refinements recited in the dependent claims advantageous improvements of the independent claim 1 gas generator, in particular for a vehicle are possible.

It is particularly advantageous that the electromagnetic actuating device releases the retaining means by means of an actuation in a predetermined actuating direction, which runs substantially perpendicular or opposite to the direction of movement of the piercing element. This means that the electromagnetic actuator can be mounted radially or axially with respect to a longitudinal axis of the gas generator to a housing of the mechanical storage device and / or a needle housing.

In an advantageous embodiment of the gas generator according to the invention, the mechanical memory can be designed as a spring store with a spring housing in which at least one tensioned spring element and a spring plate are arranged. The spring element can be performed, for example, as a spiral, sheet, form, plate spring.

In a further advantageous embodiment of the gas generator according to the invention, a pressure relief valve can be arranged on the storage gas tank, which can degrade in an emergency, for example in case of fire, resulting pressure in the storage gas tank.

In a further advantageous embodiment of the gas generator according to the invention, the piercing element can be designed as an axially movable, pointed at one end and at least partially hollow needle. The tip can be made, for example, as a slope or other suitable shape to easily pierce the puncture plate of the gas storage, if necessary. In addition, the piercing element designed as a hollow needle may comprise a longitudinal bore, which completely penetrates the piercing element, or a longitudinal bore, which is introduced into the piercing element to a predetermined depth, and a transverse bore crossing the longitudinal bore. This allows depending on the embodiment of the holes either a discharge of the released gas from the storage gas container in the axial direction, ie parallel to the longitudinal direction of the piercing element, or by a deflection in the transverse bore in any direction preferably perpendicular to the longitudinal axis of the piercing element. The continuous longitudinal bore in the piercing element can be connected directly to the connection for the media consumer. The gas consumer, for example the airbag or airbag, can then be connected directly and without leakage to the puncture element designed as a hollow needle. As a result, the efficiency of the gas generator can be increased since, in addition to the piercing point of the piercing element in the piercing plate, there are no further pressure losses, for example due to diameter jumps, etc., and leakage possibilities, for example due to annular gaps. For this, the movement of the piercing element must be compensated, for example, by a flexible design of the connecting cable. This is associated with effort, possibly also the acceleration and the movement of the piercing element can be influenced.

In a further advantageous embodiment of the gas generator according to the invention, the spring plate can transmit the force of the tensioned spring element to the other end of the piercing element or to a shoulder formed on the piercing element or collar. The other end of the piercing element is preferably arranged in the vicinity of the spring plate. In the initial state, the piercing element need not touch the piercing plate and / or the spring plate. However, the touch or even a certain bias may be useful to achieve a favorable force and acceleration transmission from the spring to the spring plate or on the piercing element and a low penetration of the piercing plate.

In a further advantageous embodiment of the gas generator according to the invention, the spring plate may have a centering for the other end of the piercing element in order to avoid jamming of the piercing element in a corresponding guide in a needle housing. The centering can be performed for example as a shallow depression in the spring plate. Alternatively, the other end of the piercing element can rest flat on the spring plate without centering. The piercing element should be made as short as possible in order to allow only small throttling effects in the relatively narrow inner bore of the piercing element.

In a further advantageous embodiment of the gas generator according to the invention, the other end of the piercing element can be guided in a recess formed on the spring plate, wherein the spring plate can be guided over an edge bead in the inner diameter of the spring housing. As a result, the needle housing, in which the piercing element is guided, are made relatively short and a compact design of the gas generator can be achieved. Due to the extended guidance of the piercing element in the recess of the spring plate jamming and hooking of the piercing element can be avoided in an advantageous manner. Additionally or alternatively, the outer bead can be greatly extended to improve the leadership of the spring plate in the spring housing.

In a further advantageous embodiment of the gas generator according to the invention, the piercing element can be extended and guided by a bore in the spring plate and by a trained on the spring housing guide point and be supported on a contact surface on the integrally formed collar on the spring plate. The power transmission from the spring plate on the piercing element is then form-fitting manner via the contact surface on the integrally formed collar. Alternatively, the piercing element, which remains unchanged in diameter as far as the point of contact with the spring plate, can be reduced in diameter as from this contact point, so that a shoulder with a contact surface is formed. The power transmission from the spring plate to the piercing element then takes place via the remaining annular surface of the shoulder on the piercing element.

In a further advantageous embodiment of the gas generator according to the invention, the needle housing in which the piercing element is guided in a longitudinal bore axially movable, fluid-tight manner connected to the storage gas tank. The connection can be carried out, for example, as a welded joint and / or caulking.

In a further advantageous embodiment of the gas generator according to the invention, the needle housing may have a transverse bore which connects the longitudinal bore in the needle housing with the connection for the media consumer. The transverse bore in the needle housing is arranged so that it is aligned in the end position of the piercing member with the transverse bore in the piercing member to deflect the gas escaping from the storage gas tank. This means that the longitudinal bore in the piercing element is connected via the transverse bore in the piercing element and the transverse bore in the needle housing to the connection for the media consumer.

In a further advantageous embodiment of the gas generator according to the invention, the spring housing, which centers the spring element and supports and guides the spring plate, axially connected to the needle housing. The connection between the spring housing and the needle housing is preferably made by caulking. Alternatively, the connection between the spring housing and the needle housing can be made by a weld or other types of connection which are adapted to receive the spring force of the spring element. The connection between the spring housing and the needle housing must not be tight, but a certain tightness, for example, as protection against contamination, useful for the restraint.

In a further advantageous embodiment of the gas generator according to the invention, the electromagnetic actuator comprises a housing in which a coil winding and a movable armature are arranged, wherein the armature is movable in response to a magnetic field generated by the coil winding from a starting position to an end position. The housing may for example comprise a housing pot and a housing cover, which forms a first pole face, which is separated in the initial state by an air gap of a second pole face of the movable armature. Alternatively, the housing may comprise a first tube piece and a first disc connected to the first tube piece, which form a housing pot, and comprise a second disc and a pole core connected to the second disc, which forms the housing cover, wherein on the pole core, a first pole face is formed, and wherein the anchor comprises a second tube piece and an actuator connected to the second tube piece and a second pole face forms, which is separated in the initial state by an air gap of the first pole face. The alternative embodiment allows the construction of the electromagnetic actuator of very simple items, which require very little Zerspan- or forming work, which may result in a cost advantage.

In a further advantageous embodiment of the gas generator according to the invention, a return spring can be arranged between the first pole face formed on the housing cover and the second pole face formed on the armature. The return spring can be guided in a bore in the armature and / or in a bore in the housing cover. Thereby, the return spring is arranged in or near the air gap between the armature and the housing. The return spring may preferably be designed as a spiral spring. But it is also possible a version as a flat-building leaf, plate or form spring. The return spring holds in the de-energized state advantageously the anchor in the starting position, so that the spring accumulator remains in the tensioned state.

In a further advantageous embodiment of the gas generator according to the invention, the movable armature can act directly or via an actuating element on the retaining means, wherein the retaining means can be moved by the movement of the armature from a retaining position to the release position. The electromagnetic actuator can be attached via the housing to the needle housing and / or on the spring housing, for example screwed or caulked by a flange.

In a further advantageous embodiment of the gas generator according to the invention, the retaining means can act directly or via the piercing element on the mechanical memory. The restraint element must absorb the forces of the mechanical storage in the idle state.

In a further advantageous embodiment of the gas generator according to the invention, the retaining means can be designed as a pin arrangement and act on a designed as a retaining pin retaining element on the mechanical memory. This is the easiest way to implement the retention of the tensioned spring element on the spring plate. In practice, however, a multiple retention may be useful to avoid that the spring element unevenly relaxed or unacceptable buckles. Thus, for example, a plurality of retaining elements designed as retention pins can be provided with further corresponding synchronously triggering electromagnetic actuation devices which can act on the spring plate at several points.

In a further advantageous embodiment of the gas generator according to the invention, the retaining means can be designed as a fork assembly, which act in contrast to a retaining pin on at least one retaining surface on the spring plate of the mechanical memory. Again, at least one second fork and correspondingly at least one further, synchronously triggering, electromagnetic actuator can be provided for a symmetrical spring restraint.

In a further advantageous embodiment of the gas generator according to the invention, the retaining means can be designed as a parallelogram, which has a flat Parallelogrammform in the initial state and acts on a plurality of retaining surfaces on the spring plate of the mechanical memory, the parallelogram in the release state has a square shape, which releases the spring plate of the mechanical memory , The parallelogram shape advantageously requires only a single electromagnetic actuating device with corresponding retention means for the mechanical accumulator. The parallelogram arrangement comprises, for example, four levers pivotally connected at their ends via joints, a first joint being coupled via an actuating element to the armature of the electromagnetic actuating device and being movable in a predetermined direction of movement, a second and a third joint being guided in corresponding guide slots allow only a vertical movement to the predetermined direction of movement, and wherein a fourth joint opposite the first joint performs a movement opposite to the predetermined direction of movement.

In a further advantageous embodiment of the gas generator according to the invention, the retaining means can be designed as a first lever arrangement, which comprises a lever which is supported in a rotary joint on the needle housing and acts in the initial state on the spring plate of the mechanical memory, wherein the armature of the electromagnetic actuator via an actuating element engages laterally on the lever with a predetermined distance to the hinge. Such a Hubübersetzung with power support can advantageously the relatively small strokes of the electromagnetic actuator and the relatively large lateral force on the armature can be compensated by the prestressed spring.

In a further advantageous embodiment of the gas generator according to the invention the retaining means can be designed as a second lever arrangement which comprises at least one lever which has a hook geometry at one end, which engages in a formed on the piercing engagement edge, wherein the piercing element formed in the initial state via a contact surface on Paragraph or the integrally formed collar on the spring plate of the mechanical memory is supported, the anchor acts via a trained anchor slope directly on a geometry of the at least one lever and aushakt the hook geometry to release the retaining means. The hook geometry of the second lever arrangement and the engagement edge formed on the puncturing element can be arranged, for example, outside the spring housing. Alternatively, the hook geometry of the second lever arrangement and the engagement edge formed on the puncturing element can be arranged within the spring housing in a free space formed within the spring element designed as a spiral spring.

Such axial mounting of the electromagnetic actuator allows a slim design of the gas generator with advantages in installation in spars, columns, etc. of a motor vehicle body. The electromagnetically actuated retaining means are arranged in the direction of the longitudinal axis and act on the piercing element and not on the spring plate. For the piercing element is running quite long and leads through holes in the spring plate and the spring housing and ends with a suitable geometry, for example, with a recess with engagement edge. At least one lever with its hook geometry engages in this engagement edge. Preferably, however, several levers in a meaningful angular pitch, d. H. same / symmetrical or uneven angular pitch, distributed over the circumference.

As a result of the alternative embodiment, the space available within the spring element can be used for the retaining means, so that the entire assembly is made considerably shorter without increasing the outside diameter.

Embodiments of the gas generator according to the invention can be used for airbag systems or other gas / media consumers in motor vehicles or for other industrial applications.

Embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description. In the drawings, like reference numerals designate components that perform the same or analog functions.

Brief description of the drawings

1 shows a schematic sectional view of a first embodiment of a gas generator according to the invention in the initial state.

2 shows a schematic sectional view of the first embodiment of a gas generator according to the invention 1 in the triggered state.

3 shows a schematic sectional view of an embodiment of a mechanical memory in the initial state for the gas generator according to the invention 1 or 2 ,

4 shows a schematic sectional view of an embodiment of a spring plate for the mechanical memory 3 ,

5 shows a schematic sectional view of another embodiment of a mechanical memory in the initial state for the gas generator according to the invention 1 or 2 ,

6 shows a schematic sectional view of an embodiment of a piercing element for the mechanical memory 5 ,

7 shows a schematic sectional view of a second embodiment of a gas generator according to the invention in the initial state.

8th shows a schematic sectional view of a first embodiment of retaining means in a starting position for the gas generators according to the invention 1 . 2 or 7 ,

9 shows a schematic sectional view of a second embodiment of retaining means in a starting position for the gas generators according to the invention 1 . 2 or 7 ,

10 shows a schematic sectional view of the second embodiment of retaining means 8th in a release position.

11 shows a schematic sectional view of a third embodiment of retaining means in a starting position for the gas generators according to the invention 1 . 2 or 7 ,

12 shows a schematic sectional view of a first embodiment of an electromagnetic actuator in an initial position for the gas generators according to the invention 1 . 2 or 7 ,

13 shows a schematic sectional view of a second embodiment of an electromagnetic actuator in an initial position for the gas generators according to the invention 1 . 2 or 7 ,

14 shows a schematic sectional view of a third embodiment of a gas generator according to the invention in the initial state.

15 shows a schematic sectional view of a fourth embodiment of a gas generator according to the invention in the initial state.

16 shows a schematic sectional view of the fourth embodiment of a gas generator according to the invention 15 in the triggered state.

Embodiments of the invention

How out 1 to 16 can be seen, the illustrated embodiments include gas generators according to the invention 100 . 100a . 100b . 100c . 100d one storage gas tank each 2 , which is designed as a storage tube housing 5 and a close-fitting puncture plate 6 includes a drive 1 and a movable piercing element 8th , which in response to a release signal by the drive 1 from a starting position into an end position is movable, in which the piercing element 8th the puncture plate 6 pierces. This escapes in the storage gas tank 2 stored gas 3 through the pierced piercing plate 6 from the storage gas tank 2 to a connection 7.2 . 7.2a . 7.2b . 7.2c to which an unillustrated media consumer, such as an airbag or airbag, is connected. The pressure in the media consumer regulates an unillustrated valve that between the port 7.2 . 7.2a . 7.2b . 7.2c and the media consumer is arranged.

According to the invention, the drive as a mechanical memory 1 executed, whose stored energy in the initial position of retaining means 30 is retained, wherein an electromagnetic actuator 10 . 10a . 10b . 10c . 10d . 10e the retention means 30 moved in response to the release signal in a release position in which the mechanical memory 1 stored energy is released, which the puncture element 8th drives and moves from the starting position to the end position. Preferably, the mechanical memory 1 as spring storage 1a . 1b . 1c . 1d . 1e . 1f with a spring housing 1.2 . 1.2a . 1.2b . 1.2c . 1.2d . 1.2e executed, in which a spring element 1.1 and a spring plate 9 . 9a . 9b . 9c . 9d are arranged.

1 shows a first embodiment of the gas generator according to the invention 100 . 100a in the initial state, and 2 shows the first embodiment of the gas generator according to the invention 100 . 100a out 1 in the triggered state.

How out 1 and 2 is apparent, is the storage gas tank 2 fluid-tight to a needle housing 7 . 7a assembled. In addition, the storage gas tank 2 with a pressure relief valve (DBV) 4 fitted. In the needle housing 7 . 7a is centrally or alternatively decentralized the axially movable piercing element 8th led, which as a partially hollow needle 8a is executed. In the illustrated embodiment, the needle housing 7 . 7a symmetrically around the connection axis to reduce the installation effort. The longitudinal bore 7.1 . 7.1a for the puncture element 8th . 8a is with the connection 7.2 . 7.2a connected, which leads to the media consumer, not shown. The piercing element 8th . 8a is at one end 8.1 sharpened in an oblique or other favorable shape, if necessary, the puncture plate 6 of the storage gas tank 2 easy to pierce. The other end 8.2 . 8.2a the piercing element 8th . 8a is near a spring plate 9 . 9a , In the initial state, the puncture element 8th . 8a the puncture plate 6 and / or the spring plate 9 . 9a do not touch. The touch or even a certain bias, however, may be useful to a favorable force and acceleration transmission of a spring element 1.1 , on the spring plate 9 . 9a or on the puncture element 8th . 8a and a cheap puncture of the puncture plate 6 to enable. The spring plate 9 . 9a transfers the spring force from the spring element designed as a spiral spring 1.1 on the puncture element 8th . 8a , In the illustrated embodiment, the spring plate 9 . 9a a centering 59 for the puncture element 8th . 8a on to a jamming of the piercing element 8th . 8a in the longitudinal bore 7.1 . 7.1a in the needle housing 7 . 7a to avoid. In an alternative embodiment, not shown, the spring plate is designed without centering and the piercing element is flat on the spring plate.

How out 1 is further apparent, the spring plate 9 . 9a and the highly preloaded spring element 1.1 in the initial state of restraints 30 . 30a held in position, which via the electromagnetic actuator 10 . 10a be operated. In the illustrated Embodiment are the retaining means as a pin arrangement 30a executed. The spring element 1.1 comes from a spring case 1.2 . 1.2a centered and supported, which in turn with the needle housing 7 . 7a connected is. This connection 1.3 is executed in the illustrated embodiment as caulking. Alternatively, a welded connection or other types of connection can be used, which the spring force of the spring element 1.1 be able to record. The connection 1.3 does not have to be tight, however, a certain tightness as protection against contamination for the retaining means 30 . 30a meaningful.

How out 1 is further apparent, comprises the electromagnetic actuator 10 . 10a a housing 60 . 60a with a housing pot 13 and a housing cover 14 . 14a , a coil winding 15 with or without winding carrier 16 . 16a and with electrical connections 17 and an anchor 18 . 18a , which with one or more parts executed and joined retaining means 30 . 30a is coupled, which in the illustrated embodiment as a retaining pin 19a executed retaining element 19 include. The electromagnetic actuator 10 . 10a is for example via the housing pot 13 in a manner not shown substantially perpendicular to the direction of movement of the piercing element 8th . 8th on the needle housing 7 . 7a and / or on the spring housing 1.2 . 1.2a attached. The electromagnetic actuator 10 . 10a can be screwed or caulked for example via a flange. The if necessary by the electrical connections 17 in the coil winding 15 guided electric current generates a magnetic field with magnetic flux 20 . 20a in the housing pot 13 and in the housing cover 14 . 14a , The housing cover 14 . 14a forms a first pole surface 21 . 21a out, which in the illustrated initial state by an air gap 23 . 23a from an opposite second pole face 22 . 22a of the anchor 18 . 18a is disconnected.

For a better mobility the anchor makes 18 . 18a radially an air gap to the housing pot 13 out. In addition, the anchor becomes 18 . 18a for example in the winding carrier 16 . 16a guided and is anxious for an applied magnetic field, the between the pole faces 21 . 21a . 22 . 22a lying air gap 23 . 23a to close, ie it moves up in the illustrated embodiment. In this case, the retaining element 19 . 19a in front of the spring plate 9 . 9a removed, the spring element 1.1 can relax and the top 8.1 the piercing element 8th . 8a can in and through the puncture plate 6 of the pressure vessel 2 bump. This final state is in 2 shown. The gas stored under an internal pressure 3 flows over one in the puncture element 8th . 8a arranged longitudinal bore 8.3 . 8.3a and one in the puncture element 8th . 8a arranged transverse bore 8.7 . 8.7a and a transverse bore 7.3 . 7.3a of the needle housing 7 . 7a to the connection 7.2 . 7.2 and further in the direction of the connected "consumer", eg the airbag or airbag.

The retaining element 19 . 19a at rest, the forces of the prestressed spring element 1.1 take up. This must be in the design of the retention element 19 . 19a , the anchor 18 . 18a and the corresponding guides. At the in 1 and 2 illustrated simple embodiment, are the retaining means 30 as a pin arrangement 30a executed, which as a retention pin 19a executed retaining element 19 includes. In practice, a multiple retention will be useful to avoid that the spring element 1.1 unevenly relaxed or inadmissible buckling. For example, several on the circumference of the spring plate 9 . 9a distributed retention pins 19a with corresponding electromagnetic actuators 10 . 10a be provided. Other suitable embodiments will be described below with reference to FIG 9 to 11 described.

In the illustrated embodiment, the needle housing 7 . 7a executed relatively short. This could cause problems in guiding the piercing element 8th . 8a resulting in jamming and hooking of the piercing element 8th . 8a can result. To avoid this, there is an in 3 illustrated extended guidance of the piercing element 8th . 8b at. How out 3 it can be seen, the piercing element 8th . 8b extended and the other end 8.2 . 8.2b the piercing element 8th . 8b is in an enlarged recess 52 of the spring plate 9 . 9a guided, which in turn has an edge formed on the outer bead 54 inside diameter 53 of the spring housing 1.2 . 1.2a is guided. To improve the guidance of the spring plate 9 . 9c in the spring housing 1.2 . 1.2a can the outer bead 54.1 strongly extended, like out 4 is apparent.

How out 5 can be further seen, the piercing element 8th . 8c be extended further and through a hole 56 in the spring plate 9 . 9d up to a guide 55 . 55a at the bottom of the spring housing 1.2 . 1.2b rich, in which the other end 8.2 . 8.2c the extended piercing element 8th . 8c to be led. The power transmission from the spring plate 9 . 9d on the puncture element 8th . 8c takes place in the illustrated embodiment form fit via a to the piercing element 8th . 8c molded ring collar 8.4 . 8.4a , which with a ring surface 58 . 58a on the spring plate 9 . 9d rests. How out 6 can be seen, alternatively, up to the point of contact with the spring plate 9 . 9d in diameter unchanged piercing element 8th . 8d , from the contact point in the further course in the diameter be reduced, leaving a paragraph 8.8 to the other end 8.2 . 8.2d the piercing element 8th . 8d arises. The power transmission from the spring plate 9 . 9d on the puncture element 8th . 8d then takes place over a remaining annular surface 58 . 58b at the heel 8.8 the piercing element 8th . 8d ,

7 shows a second embodiment of the gas generator according to the invention 100 . 100b in the initial state. How out 7 it can be seen, the piercing element 8th . 8e with a continuous longitudinal bore 8.3 . 8.3b be performed and executed by a bore as a guide point 55 . 55b in the spring housing 1.2 . 1.2c be guided. To the piercing element designed as a hollow needle 8th . 8e Then the "gas consumer", eg the airbag or airbag directly and without leakage on the port 7.2 . 7.2b connected, which at the other end 8.2 . 8.2e the piercing element 8th . 8e is trained. This allows the efficiency of the gas generator 100 . 100b be increased, because there is next to the piercing of the piercing element 8th . 8e in the puncture plate 6 no further pressure losses, such as by diameter jumps, etc., and / or leakage possibilities, such as an annular gap in the needle housing 7 . 7b , In the needle housing 7 . 7b is only the longitudinal bore 7.1 . 7.1b for guiding the piercing element 8th . 8e arranged. This requires the movement of the piercing element 8th . 8e be compensated, for example by a flexible connecting cable. In addition, due to the flexible connection line, the acceleration and / or movement behavior of the piercing element 8th . 8e be negatively influenced. The piercing element 8th . 8e should be performed as short as possible, to only small throttle effects in the relatively narrow longitudinal bore 8.3 . 8.3b in the puncture element 8th . 8e permit. The power transmission from the spring plate 9 . 9d on the puncture element 8th . 8e also takes place here form fit via a to the puncture element 8th . 8e molded ring collar 8.4 . 8.4c , which with a ring surface 58 . 58c on the spring plate 9 . 9d rests.

The following will be with reference to 8th to 11 various embodiments of the retaining means 30 described which in the embodiments described so far as an alternative to the pin assembly 30a with the as a retention pin 19a executed retaining element 19 can be used.

How out 8th can be further seen, include the fork assembly 30b executed retention means 30 a retaining fork 31 , which the circular spring plate shown 9 . 9a . 9b . 9c . 9d hold in its starting position. For this purpose, the retaining fork 31 in the illustrated embodiment, two contact surfaces or retaining surfaces 40 with the spring plate 9 . 9a . 9b . 9c . 9d on. With a movement of the retaining fork 31 in the arrow direction above, which by the electromagnetic actuator 10 . 10a in conjunction with the anchor 18 . 18a and one with the anchor 18 . 18a connected actuator 19b is effected, the spring plate 9 . 9a . 9b . 9c . 9d free and can move appropriately (in this view out of the drawing plane). In addition, a second retaining fork can be used for symmetrical spring retention 31 and according to another, synchronously triggering, electromagnetic actuator 10 . 10a be used.

How out 9 and 10 is further apparent, have the as a parallelogram 30c executed retention means 30 the shape of a parallelogram. The four sides of the parallelogram are levered 32 . 33 . 34 . 35 formed, which rotatably at their ends, for example via rotational joints 36 . 37 . 38 . 39 , are interconnected. A first pivot point 38 is over at a coupling area 41 on the actuator 19c with the anchor 18 . 18a the electromagnetic actuator 10 . 10a connected and can therefore move in case of need in the direction of arrow up accordingly. The pivot points of the two rotational joints 37 . 39 be in housing-fixed guide slots 42 . 43 guided. The guide slots 42 . 43 allow only a movement of the two rotational joints 37 . 39 at right angles to the direction of movement of the first point of articulation 38 , The lower hinge point 36 leads due to the parallel gram structure a the first hinge point 38 opposite movement down. Im in 9 illustrated initial state of the described gas generator 100 . 100a . 100b shows the parallelogram arrangement 30c the shape of a flattened parallelogram and the levers 32 . 33 . 34 . 35 each have a contact surface or retention surface 40 with the spring plate 9 . 9a . 9b . 9c . 9d on. This will make the spring plate 9 . 9a . 9b . 9c . 9d kept in initial position. If necessary, the first pivot point 38 Moves upwards in the arrow direction, the shape of the parallelogram is 30c into a square shape that changes into 10 is shown. This leads to no contact surfaces or retention surfaces 40 more between the levers 32 . 33 . 34 . 35 and the spring plate 9 . 9a . 9b . 9c . 9d consist. This will make the spring plate 9 . 9a . 9b . 9c . 9d no longer held back, the prestressed spring element 1.1 can relax freely and the spring plate 9 . 9a . 9b . 9c . 9d with the piercing element 8th move (here out of the drawing). Through the parallelogram arrangement 30c is advantageously only a single electromagnetic actuator 10 . 10a for actuating corresponding retaining means 30 with several retention surfaces 40 required.

How out 11 is further apparent, as the first lever arrangement 30d executed retention means 30 on the spring plate 9 . 9a act, a Hubübersetzung with power support. Here, the lever is supported 50 in a swiveled 51 on the needle housing 7 . 7a from and holds the spring element 1.1 with spring plate 9 . 9a back. Laterally on the lever 50 engages the anchor 18 . 18a the electromagnetic actuator 10 . 10 via an actuating element 19d at. The ratios of the lever lengths L1 and L2 result in a stroke ratio of the armature stroke to the tripping stroke according to equation (1) Stroke = Stroke (Anchor) · (L1 + L2) / L2 (1).

The strokes of electromagnetic linear actuators are relatively small, possibly too small to the biased spring element 1.1 sufficiently safe to retain and release if necessary. The through the preloaded spring 1 applied force, which is a lateral force on the anchor 18 . 18a the electromagnetic actuator 10 . 10a is relatively large. Both points can be compensated in an advantageous manner by first lever arrangement.

The following will be with reference to 12 and 13 various embodiments of the electromagnetic actuator 10 . 10b . 10c described which in the embodiments described so far as an alternative to the electromagnetic actuator 10a can be used.

How out 12 is further apparent, comprises the electromagnetic actuator 10 . 10b analogous to the electromagnetic actuator 10 . 10a a housing 60 . 60a with a housing pot 13 and a housing cover 14 . 14a , a coil winding 15 with electrical connections 17 and an anchor 18 . 18b , which via a retaining element or actuating element 19 with one or more parts executed and joined retention means 30 is coupled. The if necessary by the electrical connections 17 in the coil winding 15 guided electric current creates a magnetic field with magnetic flux in the housing pot 13 and in the housing cover 14 . 14a , The housing cover 14 . 14a forms a first pole surface 21 . 21a out, which in the illustrated initial state by an air gap 23 . 23b from an opposite second pole face 22 . 22b of the anchor 18 . 18b is disconnected. In contrast to the electromagnetic actuator 10 . 10a is in or near the air gap 23 . 23b between the anchor 18 . 18b and the housing cover 14 . 14a a return spring 70 . 70a arranged. In the illustrated embodiment, the return spring 70 . 70a in a hole 18.1 . 18.1a in the anchor 18 . 18b arranged. Additionally or alternatively, for guiding the return spring 70 . 70a a hole in the housing cover 14 . 14a be introduced. In the illustrated embodiment, the return spring 70 . 70a designed as a spiral spring. But are also possible flat-building leaf, plate or shaped springs. The return spring 70 . 70a holds the anchor in the de-energized state 18 . 18b with the retaining element or actuating element 19 in the starting position and thus also the spring plate 9 and the piercing element 8th in the starting position.

How out 13 can be further seen, the electromagnetic actuator 10 . 10c be built from very simple items that require very little Zerspan- or forming work. Thus, the housing pot is in two parts from a first piece of pipe 72 and a first disc 73 executed. The anchor 18 . 18c is also in two parts from a second piece of pipe 71 and a retaining element or actuating element 19 built up. The housing cover is also in two parts of a pole core 74 . 74a and a second disc 75 . 75a built up. The if necessary by the electrical connections 17 in the coil winding 15 guided electric current generates a magnetic field with magnetic flux in the first piece of pipe 72 , in the first disc 73 , in the second piece of pipe 71 , in the pole core 74 . 74a and in the second disc 75 . 75a , The Polkern 74 . 74a forms a first pole surface 21 . 21b out, which in the illustrated initial state by an air gap 23 . 23b from an opposite second pole face 22 . 22b of the anchor 18 . 18b is disconnected. In or near the air gap 23 . 23b between the anchor 18 . 18b and the pole core 74 . 74a is a return spring 70 . 70b arranged. In the illustrated embodiment, the return spring 70 . 70b in a depression 18.1 . 18.1b in the anchor 18 . 18b arranged. Additionally or alternatively, for guiding the return spring 70 . 70b a hole in the pole core 74 . 74a be introduced.

14 shows a third embodiment of the gas generator according to the invention 100 . 100c in the initial state. How out 14 can be seen, allowed the axial mounting of the electromagnetic actuator 10 . 10d a slim design of the gas generator 100 . 100c with advantages when installing in spars, columns, etc. of a motor vehicle body. To avoid repetition, the arrangement of the piercing element will be concerned 8th . 8f , of the needle housing 1.2 . 1.2d , the connection 7.2 . 7.2c , the needle housing 7 . 7c and the pressure accumulator 2 will apply to the comments 1 directed.

How out 14 can be seen, are retention means 30 . 30e and the electromagnetic actuator 10 . 10d arranged in the direction of the longitudinal axis and act on the piercing element 8th . 8f while in the first embodiment according to 1 and 2 the effect of Retention means 30 on the spring plate 9 he follows. This is the puncture element 8th . 8f Run relatively long and leads through holes 56 . 55 . 55c in the spring plate 9 . 9d and in the spring housing 1.2 . 1.2d through and ends with a suitable geometry, such as a recess 8.5 . 8.5a with an engaging edge 8.6 . 8.6a , In this turn 8.5 . 8.5a grab at least one or more levers 44 . 44a with a hook geometry 45 . 45a a, which are distributed over the circumference for clear assembly in reasonable angular pitch, ie equal / symmetric or non-uniform angular pitch. The levers 44 . 44a be at the other end 46 . 46a between a step of the housing 60 . 60c and a disc 61 . 61a held. In addition, there are the levers 44 . 44a with a suitable investment geometry 47 . 47a , which is for example rounded or flat, on a slope 18.2 . 18.2a the anchor 18 . 18c the electromagnetic actuator 10 . 10d at. The anchor 18 . 18c is in the winding carrier 16 . 16b radially mechanically guided. The winding carrier 16 . 16b is axially in the housing 60 . 60c mounted, for example by pressing, and carries the positionally stable pole core 74 . 74b , which is for example also pressed. The anchor 18 . 18c is in the initial state, ie energized coil winding 15 , by a return spring 70 . 70c from the pole core 74 . 74b pushed away until it stops him 48 . 48a touched. In this position, ie anchor 18 . 18c is at the stop 48 . 48a on, the levers touch 44 . 44a at the same time and without play the anchor 18 . 18c , the puncture element 8th . 8f and the case 60 . 60c , The stop 48 For example, by the piercing element 8th . 8f or by a spacer on the piercing element 8th . 8f or by a stop geometry on the levers 40 . 44 or by a pen 48a are formed, which across the housing 60 . 60c is plugged. The housing 60 . 60c is suitably on the spring housing 1.2 . 1.2d attached. The anchor 18 . 18c is part of a solenoid circuit, which by applying a current to the coil winding 15 arises. The magnetic flux 20 . 20b flows in the pole core 74 . 74b , in anchor 18 . 18c , in the disk 61 . 61 , in the housing 60 . 60c and in the cover 14 . 14c ,

By applying the current to the electrical connections 17 becomes the anchor 18 . 18c against the force of the return spring 70 . 70c in the direction of Polkern 74 . 74b drawn. The anchor slope 18.2 . 18.a pushes the levers 44 . 44a radially outward. That's how the hook ends 45 . 45a from the engagement edge 8.6 . 8.6a the rotation 8.5 . 8.5a the piercing element 8th . 8f unhooked, leaving no restraining force for the tensioned spring element 1.1 is present. The spring element 1.1 relaxes and accelerates the spring plate 9 . 9d and the piercing element 8th . 8f with a ring collar 8.4 . 8.4d so that the puncture element 8th . 8f with the pointed end 8.1 the puncture plate 6 of the accumulator 2 pierces. The power transmission from the spring plate 9 . 9d on the puncture element 8th . 8f takes place in the illustrated embodiment, a form-fitting via the at the piercing element 8th . 8f molded ring collar 8.4 . 8.4d , which with a ring surface 58 . 58d on the spring plate 9 . 9d rests. So that the puncture element 8th . 8f can complete this movement, the bore can 55 . 55c on the spring housing 1.2 . 1.2d with a slope 57 or a flanging be provided so that the recess 8.5 . 8.5a the piercing element 8th . 8f does not get stuck.

Alternatively, the levers 44 . 44a with a spring device, for example, as a dashed circumferential worm spring 49 is executed, held. This can be helpful for mounting and maintaining the position in the initial state. However, it should be noted that, if necessary, the electromagnetic actuator 10 . 10d the levers 44 . 44a against this worm's feather 49 from the recess 8.5 . 8.5a must lift and also the force of the return spring 70 . 70c must overcome. A sufficient excess of force of the electromagnetic actuator 10 . 10d should therefore be provided.

15 shows a fourth embodiment of the gas generator according to the invention 100 . 100d in the initial state, and 16 shows the fourth embodiment of the gas generator according to the invention 100 . 100d out 1 in the triggered state.

How on 15 and 16 is apparent is in the fourth embodiment, in contrast to the third embodiment according to 14 a within the spring element 1.1 in the spring housing 1.2 . 1.2e existing space for the retention means 30 . 30f used. Thus, the entire assembly without enlargement of the outer diameter can be made considerably shorter. The retaining levers 44 . 44b be between the spring housing 1.2 . 1.2f and the disc 61 . 61b held. The anchor 18 . 18d is in the initial state, ie energized coil winding 15 , by a return spring 70 . 70d from the pole core 74 . 74c pushed away until it stops him 48 . 48b touched. In this position, ie anchor 18 . 18d is at the stop 48 . 48d on, the levers touch 44 . 44b at the same time and without play the anchor 18 . 18d about the investment geometry 47 . 47b , the puncture element 8th . 8f over the hook geometry 45 . 45b and the case 60 . 60c over the end of the lever 46 . 46b , The electromagnetic flow 20 . 20c will be in the disk 61 . 61b , the housing 60 . 60b , which is designed for example as a piece of pipe, the one-piece or multi-part pole core 74 . 74c with the pole core disk 75 . 75b and the anchor 18 . 18d directed. The housing 60 . 60b can, for example, an adapted diameter range of the spring housing 1.2 . 1.2e be mounted, for example by Pressing on. In the case 60 . 60b is the winding carrier 16 . 16c with the coil winding 15 firmly installed. The winding carrier 16 . 16c leads the anchor 18 . 18d radially and can be made of plastic, for example.

The triggered retention means 30 . 30f are in 16 represented: The anchor 18 . 18d has the air gap 23 . 23d overcome and lies at the pole core 74 . 74c at. The levers 44 . 44b are due to the anchor slope 18.2 . 18.2b pivoted outwards so that the hook ends 45 . 45b from the engagement edge 8.6 . 8.6b the rotation 8.5 . 8.5b in the puncture element 8th . 8g unhooked and the puncture element 8th . 8g , the spring element 1.1 and the spring plate 9 . 9d are released. The spring element 1.1 has relaxed and the puncture element 8th . 8g has the puncture plate 6 punctured. The power transmission from the spring plate 9 . 9d on the puncture element 8th . 8g takes place in the illustrated embodiment, also form-fitting via a to the piercing element 8th . 8f molded ring collar 8.4 . 8.4d , which with a ring surface 58 . 58d on the spring plate 9 . 9d rests. The escaping gas 3 supplied after passing the connection 7.2 . 7.2c and a valve connected in series, not shown, which is designed for example as a pressure regulating and / or Druckeinstellventil, the media consumer.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10114020 A1 [0003]
• DE 102007003320 A1 [0004]
• DE 19951672 C2 [0005]
• DE 10346372 A1 [0006]

Claims (29)

Gas generator, in particular for a vehicle, having a storage gas tank ( 2 ), which a housing ( 5 ) and a housing ( 5 ) final puncture plate ( 6 ), a drive ( 1 ) and a movable piercing element ( 8th ), which in response to a release signal by the drive ( 1 ) is movable from an initial position to an end position, in which the piercing element ( 8th ) the puncture plate ( 6 ) penetrates, wherein in the storage gas tank ( 2 stored gas ( 3 ) through the pierced puncture plate ( 6 ) from the storage gas tank ( 2 ) to a connection ( 7.2 ) escapes, to which a media consumer can be connected, characterized in that the drive as a mechanical memory ( 1 ) is carried out, the stored energy in the initial position of restraining means ( 30 ), wherein an electromagnetic actuator ( 10 ) the retaining means ( 30 ) is moved in response to the release signal in a release position in which the in the mechanical memory ( 1 stored energy is released and the puncture element ( 8th ) and moves from the starting position to the end position. Gas generator according to claim 1, characterized in that the electromagnetic actuator ( 10 ) the retaining means ( 30 ) releases by means of an actuation in a predetermined actuating direction, which is substantially perpendicular or opposite to the direction of movement of the piercing element ( 8th ) runs. Gas generator according to claim 1 or 2, characterized in that the mechanical memory ( 1 ) as a spring accumulator with a spring housing ( 1.2 ) is executed, in which at least one tensioned spring element ( 1.1 ) and a spring plate ( 9 ) are arranged. Gas generator according to one of claims 1 to 3, characterized in that the storage gas tank ( 2 ) a pressure relief valve ( 4 ), which is formed in an emergency overpressure in the storage gas tank ( 2 ) degrades. Gas generator according to one of claims 1 to 4, characterized in that the piercing element ( 8th ) as axially movable, at one end ( 8.1 ) sharpened and at least partially hollow needle ( 8a . 8b . 8c . 8d . 8e . 8f . 8g ) is executed. Gas generator according to claim 5, characterized in that the hollow needle ( 8a . 8b . 8c . 8d . 8e . 8f . 8g ) puncture element ( 8th ) a longitudinal bore ( 8.3b ), which the puncture element ( 8e ) completely penetrates, or a longitudinal bore ( 8.3a . 8.3c ), which up to a predetermined depth in the piercing element ( 8a . 8b . 8c . 8f . 8g ) is introduced, and a longitudinal bore ( 8.3a . 83.c ) crossing transverse bore ( 8.7 ). Gas generator according to claim 6, characterized in that the continuous longitudinal bore ( 8.3b ) in the puncture element ( 8e ) directly to the port ( 7.2b ) is connected to the media consumer. Gas generator according to one of claims 3 to 7, characterized in that the spring plate ( 9 ) the force of the tensioned spring element ( 1.1 ) to the other end ( 8.2 ) of the piercing element ( 8th ) or at the puncture element ( 8th ) trained federation ( 8.4 ) or paragraph ( 8.8 ) transmits. Gas generator according to claim 8, characterized in that the spring plate ( 9a ) a centering ( 59 ) for the other end ( 8.2a ) of the piercing element ( 8a ) having. Gas generator according to one of claims 8 to 9, characterized in that the other end ( 8.2b ) of the piercing element ( 8b ) in one on the spring plate ( 9b ) formed recess ( 52 ) is guided, wherein the spring plate ( 9b ) over an edge bead ( 54 ) in the inner diameter ( 53 ) of the spring housing ( 1.2 ) is guided. Gas generator according to claim 8, characterized in that the piercing element ( 8c . 8d . 8e . 8f ) through a hole ( 56 ) in the spring plate ( 9d ) and by a spring housing ( 1.2b . 1.2c . 1.2d ) trained management position ( 55 ) is guided and over a contact surface ( 58 ) at the formed paragraph ( 8.8 ) or on the molded collar ( 8.4 ) on the spring plate ( 9d ) is supported. Gas generator according to one of claims 1 to 11, characterized in that a needle housing ( 7 ), in which the puncture element ( 8th ) in a longitudinal bore ( 7.1 ) is axially movable, axially fluid-tight with the storage gas tank ( 2 ) connected is. Gas generator according to claim 12, characterized in that the needle housing ( 7a . 7c ) a transverse bore ( 7.3 ), which the longitudinal bore ( 7.1 ) in the needle housing ( 7a . 7c ) with the connection ( 7.2a . 7.2c ) for the media consumer. Gas generator according to claim 13, characterized in that the longitudinal bore ( 8.3a . 8.3c ) in the puncture element ( 8a . 8b . 8c . 8f . 8g ) over the transverse bore ( 7.3 ) in the puncture element ( 8a . 8b . 8c . 8f . 8g ) and the transverse bore ( 7.3 ) in the needle housing ( 7 ) with the connection ( 7.2a . 7.2c ) is connected to the media consumer. Gas generator according to one of claims 12 to 14, characterized in that the spring housing ( 1.2 ), which the spring element ( 1.1 ) centers and supports and the spring plate ( 9 ), axially with the needle housing ( 7 ) connected is. Gas generator according to one of claims 1 to 15, characterized in that the electromagnetic actuator ( 10 ) a housing ( 60 ), in which a coil winding ( 15 ) and a movable anchor ( 18 ) are arranged, wherein the anchor ( 18 ) depending on a through the coil winding ( 15 ) generated magnetic field ( 20 ) is movable from a starting position into an end position. Gas generator according to claim 16, characterized in that the housing ( 60a ) a housing pot ( 13 ) and a housing cover ( 14a ), which has a first pole face ( 21a ), which in the initial state through an air gap ( 23 ) from a second pole face ( 22 ) of the movable armature ( 18 ) is disconnected. Gas generator according to claim 16, characterized in that the housing ( 60b ) a first piece of pipe ( 72 ) and one with the first piece of pipe ( 72 ) connected first disc ( 73 ), which form a housing pot, and a second disc ( 75 ) and one with the second disc ( 75 ) connected pole core ( 74 ), which covers the housing cover ( 14b ), whereby at the pole core ( 74 ) a first pole face ( 21b ), and wherein the armature ( 18b ) a second piece of pipe ( 71 ) and one with the second piece of pipe ( 71 ) associated actuator ( 19b ) and a second pole face ( 22b ), which in the initial state through an air gap ( 23b ) from the first pole face ( 21b ) is disconnected. Gas generator according to claim 17 or 18, characterized in that between the on the housing cover ( 14 ) formed first pole face ( 21 ) and the anchor ( 18 ) formed second pole face ( 22 ) a return spring ( 70 ), wherein the return spring in a bore in the armature ( 18.1 ) and / or in a bore in the housing cover ( 14 ) is guided. Gas generator according to one of claims 16 to 19, characterized in that the movable armature ( 18 ) directly or via an actuator ( 19b . 19c . 19d ) on the retaining means ( 30 ), the retention means ( 30 ) by the movement of the armature ( 18 ) are movable from a retaining position to the release position. Gas generator according to one of claims 1 to 20, characterized in that the retaining means ( 30 ) directly or via the piercing element ( 8th ) on the mechanical memory ( 1 ) Act. Gas generator according to claim 21, characterized in that the retaining means ( 30 ) as a pin arrangement ( 30a ) and via a retention pin ( 19a ) executed retaining element ( 19 ) on the mechanical memory ( 1a . 1b . 1c ) Act. Gas generator according to claim 21, characterized in that the retaining means ( 30 ) as a fork assembly ( 30b ) are executed, which over at least one retaining surface ( 40 ) on the spring plate ( 9a . 9b . 9c . 9d ) of the mechanical memory ( 1a . 1b . 1c . 1d ) acts. Gas generator according to claim 21, characterized in that the retaining means ( 30 ) as a parallelogram arrangement ( 30c ) are executed, which has a flat parallelogram shape in the initial state and over a plurality of retaining surfaces ( 40 ) on the spring plate ( 9a . 9b . 9c . 9d ) of the mechanical memory ( 1a . 1b . 1c . 1d ), the parallelogram arrangement ( 30c ) in the release state has a square shape, which the spring plate ( 9a . 9b . 9c . 9d ) of the mechanical memory ( 1a . 1b . 1c . 1d ) releases. Gas generator according to claim 24, characterized in that the parallelogram arrangement ( 30c ) four at their ends via joints ( 36 . 37 . 38 . 39 ) rotatably connected levers ( 32 . 33 . 34 . 35 ), wherein a first joint ( 38 ) via an actuating element ( 19c ) with the anchor ( 18 ) of the electromagnetic actuator ( 10 ) and is movable in a predetermined direction of movement, wherein a second and a third joint ( 37 . 39 ) in corresponding guide slots ( 42 . 43 ) are guided, which allow only a vertical movement to the predetermined direction of movement, and wherein the first joint ( 38 ) Opposite fourth joint ( 36 ) performs a movement opposite to the predetermined direction of movement. Gas generator according to claim 21, characterized in that the retaining means ( 30 ) as a first lever arrangement ( 30d ) are executed, which a lever ( 50 ), which is located in a rotary joint ( 51 ) on the needle housing ( 7 ) and in the initial state on the spring plate ( 9a ) of the mechanical memory ( 1a ), the anchor ( 18 ) of the electromagnetic actuator ( 10 ) via an actuating element ( 19d ) with a predetermined distance (L2) to the rotary joint ( 51 ) on the side of the lever ( 50 ) attacks. Gas generator according to claim 21, characterized in that the retaining means ( 30 ) as a second lever arrangement ( 30e . 30f ) are executed, which at least one lever ( 44 ), which at one end has a hook geometry ( 45 ) having, which in one at the puncture element ( 8e . 8f ) formed engaging edge ( 8.6 ), wherein the piercing element ( 8e . 8f ) in the initial state via a contact surface ( 58d ) at the formed paragraph ( 8.8 ) or on the molded collar ( 8.4d ) on the spring plate ( 9d ) of the mechanical memory ( 1e . 1f ), wherein the armature ( 18c . 18d ) via a trained anchor slope ( 18.2 ) directly on a system geometry ( 47 ) of the at least one lever ( 44 ) and the hook geometry ( 45 ) to unlock the retaining means ( 30 ). Gas generator according to claim 27, characterized in that the hook geometry ( 45a ) the second lever arrangement ( 30e ) and the at the piercing element ( 8e ) formed engaging edge ( 8.6a ) outside the spring housing ( 1.2d ) are arranged. Gas generator according to claim 27, characterized in that the hook geometry ( 45b ) the second lever arrangement ( 30f ) and the at the piercing element ( 8f ) formed engaging edge ( 8.6b ) within the spring housing ( 1.2e ) in a spring element (in the form of a spiral spring) 1.1 ) formed free space are arranged.

Images