DE2904420A1 - BUCKLE FOR SEAT BELTS - Google Patents

Description

SECURAIGLON SA
Trelaze, Maine-et - Loire / France

BUCKLE FOR SEAT BELTS

The invention relates to a buckle for seat belts or belt systems, which consists of a buckle tongue and a housing, which consists essentially of a housing base and parallel side walls is formed, which extend in their upper part at least partially towards the interior of the housing, as well as from Sections which are bent over in a plane parallel to the housing bottom to form guide rails, and which has at least one locking lever articulated to the side walls, which both at least has a locking part for the buckle tongue and a support surface, the housing further comprises actuating devices for release, consisting of a push button with lateral guides exist, which interact with the guide rails

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ken, and also one limited by two side surfaces Has cutout on the back, the two side surfaces each having two mutually parallel guide slopes exhibit.

In particular, the invention relates to such a buckle for seat belts in motor vehicles and Aircraft that are used in particular with one hand and let it seal.

Numerous proposals have already been made for the formation of seat belt buckles. The biggest part These buckles consist of a locking tongue that is inserted into a housing or a main part of the buckle which the locking tongue is held, the tongue being released by acting on an external actuator pushes, pulls, or lets it slide out.

For example, the French utility model No. 74 29 672 relates to a buckle for safety belts, in which a tongue with an opening is inserted into a cavity formed in the main buckle part and enclosed by two fixed side plates and guide elements, the guide elements cooperating with two longitudinal edges of the tongue and wherein the main buckle part also has a latch for locking, which is attached to one of the side plates and is supported in the locking position against the other plate. With an actuating device which acts on the latch, it is possible, whose

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Protrusion that was inserted into the locking tongue, too relocate and thus ensure its release.

To keep the locking tongue locked, such a device requires three different parts: two plates and a latch, not to mention springs, which increases manufacturing costs quite significantly increase and the assembly time becomes very long.

Furthermore, in the French patent specification 1.483.220 describes a buckle for a seat belt which has two levers. The first lever is with one Locking part provided for the locking tongue inserted into the buckle and pivotable on the side walls attached to the buckle; the second lever is also pivotable on the side walls parallel attached to the pivot axis of the first lever above the same. On one at a distance from these two pivot axes on the same side thereof, certain areas of the first and second lever are connected to each other so connected that the movement of the end of the second lever that is on the other side of the second pivot axis is, in the direction of the first lever lifts the part of the first lever that carries the locking part.

With a buckle of this type it is necessary to that spikes or hinge pins to form the lever pivot axes and openings in the side walls of the buckle for these hinge pins are provided, which makes and demands certain requirements during manufacture, that weak points are provided to prevent the buckle resistance to tensile stress.

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The invention is now based on the object to provide a buckle for seat belts that so little Has parts as possible, which can be put together very easily and quickly, and the tensile load or under the action of a very strong impact offers even more resistance, and in particular only off consists of two resistive parts, which are preferably made of steel and have no axis.

This object is achieved according to the invention with a buckle of the type described in that the Guide bevels without any further intermediate element Approaches work together that are firmly attached to the support surface of the locking lever are connected.

Thus, according to the invention, there is a new seat belt buckle created, which has a minimum of parts, which is very easy to use, works very reliably and is easy to manufacture.

In a preferred embodiment of the invention Belt buckle, the side walls of the housing consist of two lower and two upper wall sections, wherein the distance between the lower wall sections is smaller than the distance between the upper wall sections is, which in turn is substantially equal to or greater than the greatest width of the locking lever is.

The locking lever is fastened in the housing via two side parts with opposite openings cooperate, which are formed in the side walls of the housing.

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The openings are formed in the lower wall sections of the housing and extend, at least in part, also into the upper wall sections of the housing.

The locking lever can have two locking parts on both sides of the support surface that extend downwards extend and cooperate with the rear surfaces of the locking pin of the tongue.

The locking lever is held in its locking position by means of an elastic device, which exerts a force on the support surface in the direction of the housing base.

The lower end of the guide bevels has holding stops with which the lugs on the support surface of the lever.

The push button has in its rear part a protruding part on which a spring is arranged, the other end of which is supported on a projection of the housing at its rear end.

The bottom of the housing has a recess in which a spring is kept enclosed, which is in Can compress the locking position through the buckle mandrel of the buckle tongue.

The wall of the housing has a tab that is used for Housing interior is directed and partially above of the buckle mandrel extends in the locking position.

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The invention will now be described with reference to FIG
the accompanying drawings are described in more detail with reference to some by no means restrictive exemplary embodiments and
explained. Show it:

Fig. 1 is an exploded view of the seat belt buckle according to the invention and its various Parts;

2A, each a view from the front, from above and from the side of a central longitudinal section through the
Housing from Fig. 1,
and

3A, each a view from the side, from above and

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from below onto the locking lever from FIG. 1.

A buckle for a seat belt consists of a locking tongue 1 and a housing 2. In this housing 2
a locking lever 3 is arranged, the side parts 4 and 4 'in openings 5 and 5 ^? be introduced and held there; the openings 5 and 5 'are formed in the side walls 6 and 6' of the bottom 2 ^{1 of} the housing 2.

In the case of Fig. 1, the side parts or approaches
4 and 4 'of the locking lever essentially have the shape of a parallelepiped and are preferably bent downwards; they cooperate with the openings 5 and 5 ¹ ,
which are each rectangular in their lower section so that the width of the rectangles is essentially

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chen is equal to the width of the parallelepiped. Although this training is not the preferred embodiment, however, it is possible to design tabs 4, 4 'in the form of a horizontal parallelepiped.

The upper portion of the openings 5 and 5 'can have any suitable shape so that the locking lever 3 can be easily inserted; the dimensions and shapes of the openings can be very easily determined by a person skilled in the art as a function of the given shape of the side parts 4 and 4 ^? of the locking lever.

In any case, according to an essential feature of the invention, the upper portion of the openings 5 and 5 'goes into FIG the upper portion of the walls 6 and 6 'of the housing. Preferably, each housing wall actually exists from a lower wall section 6a or 6'a and an upper wall section 6b or 6'b, the distance between the wall parts 6a and 6'a smaller than is the distance between the sections 6b and 6'b, which in turn is essentially equal to the greatest width of the Locking lever, i.e. the distance between the outer points of its side parts 4 and 4 ', or slightly larger than this is. It can be seen that under these conditions the locking lever easily enters the housing can be introduced in the same way from the front as from the rear, along the walls 6b and 6'b to slides to the height at which the openings 5 and 5 'enter these walls. Arrive at that moment the lever parts 4 and 4 'in a forwardly inclined position into the openings 5 and 5'.

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Because the arrangement of two walls 6a, 6b and 6'a, 6'b is provided, the problems are solved have previously dealt with the positioning of the locking parts, namely the positioning in the transverse direction in order to introduce the support points of the same, which takes a longer time, or the positioning from the front, using pins or pivot axes to create weak points.

So that the lever only disengages from the openings can be brought, if you cover the above path in the opposite direction, you can see at the top End 7 of the front part of the openings 5, 5 'in front of a section of material that extends slightly towards the rear of the Housing extends towards to counter an upward movement of the front portion of the tabs 4 and 4 'of the locking lever.

The locking lever 3 also has locking parts 8 and 8 'which extend downwards and are in the locking position cooperate with the rear surfaces 9 and 9 'of the locking pin of the buckle tongue 1.

Of course, it is possible to provide only a single locking part, which is essentially below the locking lever is arranged in the middle, and instead of the locking tongue 1, a tongue with an opening at its end to be provided.

To maintain the locking and to hold the Tongue 1 must be applied a force directed towards the bottom of the housing, which the end or the support

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surface 11 of the lever 3 is applied, which is to Rear side of the housing 2 extends out. To this end for example, a spring 12 can be used, the central part 13 of which is supported on the surface 11 of the lever 3, while the ends 14 and 14 'of this spring are held in opposing openings 15 and 15 " are, for this purpose, in the walls 6a and 6'a of the housing essentially at the level of its floor are trained.

To release the buckle, an actuating means accessible from the outside of the buckle is used, which consists of a pushbutton 16 and has guides 17 and 17 'on its side surfaces (not shown) which cooperate with guide rails 18 and 18' which consist of a section of the walls 6b and 6b ^{1 of} the housing are formed by folding over towards the interior of the housing in a plane which is essentially parallel to the housing base 2 '.

The push button shows a recess in it — a middle one rear section, while on the opposing inner surfaces 19 and 19 '(not visible) this recess two guide slopes 20 and 20 'are formed, which towards the rear end of the push button are inclined downwards.

The guide bevels 20 and 20 'cooperate with lugs 21 and 21' which extend laterally at the end of the support surface 11 of the locking lever. There are stops 22 at the ends of the guide bevels 20 and 20 '

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and 22 'are provided to prevent the lugs 21 and 21 'of the lever slide out of the pushbutton 16.

If the pushbutton 16 is subjected to a force in the direction of arrow A, it slides on the rails 18 and 18 with their guides 17 and 17 '. The approaches 21 and 21 'lead under the action of the shift the guide saws 20 and 20 'move after above, based on the buckle, which forces the lever 3 to pivot via its lugs 4 and 4 ' and thereby lifting the locking parts 8 and 8 ', which apart from input: iff with the surfaces 9 and 9' of the buckle mandrel 10 of the locking tongue 1 are brought, so that an unlocking takes place.

So that the tongue can be removed more easily, a spring 23 is provided on the bottom 2 'of the housing 2, which is compressed in the locking position by the locking pin 10 of the buckle tongue 1 and which at the moment in which the unlocking takes place, leads to the fact that the tongue snaps out of the housing.

The spring 12 acts on the end 11 of the lever with a force trying to get that end down while pressing the pushbutton back in a direction opposite to arrow A, but this can Effect to achieve an automatic locking can be reinforced; by providing a spring that on the one hand on a projection or a protruding part 25 at the rear end of the push button and on the other hand is supported on a projection 26 at the rear end of the housing 2. With this arrangement it is possible in the moment the tongue is inserted into the housing

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will achieve a faster locking of the buckle. This makes it even easier for the tongue to get into the buckle Let introduce, it is desirable to raise the front end 3 * of the lever 3.

To keep the tongue substantially in the base plane of the housing and to prevent the locking pin from falling 10 does not move upwards, it is also possible to have holding means, such as an elevation, on the housing or to provide a wall section 28 which protrudes into the interior of the housing and is partially above of the locking pin extends.

Pie belt loop or the belt itself is not shown in the drawing; this is in the slot 27 inserted in the tongue 1. In the same way, the housing 2 with a strap by analog devices or means be fixedly connected, but not shown, or it can be with the frame of the vehicle be connected by a cable, metal plate or similar means. Furthermore is the case for essentially aesthetic reasons enclosed in an envelope, for example in a plastic jacket, which also protects the buckle mechanism without affecting its operation in any way.

When using a buckle according to the invention, the tongue 1 is guided into the housing 2 in the free space between the front end 3 'of the locking lever and the bottom 2 ^{1 of} the housing 1. The locking pin 10 compresses the spring 23 and backwards and lifts the lock -

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parts 8, 8 'of the locking lever, which in turn are behind the rear surfaces 9, 9' of the locking pin fall back down and hold onto it.

To release the belt again, press the button in the direction of arrow A; move the lugs 21, 21 ' on the guide slopes 20, 20 'of the push button upwards and cause an upward movement of the locking parts 8, 8 ', whereupon the released in this way Tongue by the fact that the spring 23 loses its tension, snaps out.

The push button 16 itself returns to its original position under the action of the released spring 24.

Buckles, as shown in the drawing, have several compared to the known buckles Advantages on:

- They have an extremely small number of parts, making them more reliable and cheaper while on the other hand, their resistance to tensile stress increases greatly, with the unlocking through Application of a hardly increased pressure can be brought about;

- these parts, and in particular the lever, are simply shaped and can be adjusted using the usual Techniques very easy to manufacture, with the arrangement of a housing in two widths also a quick assembly allowed, which significantly reduces the manufacturing costs.

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In addition, the important point to be noted is that the invention Buckles can be operated by the user even when the push button or the cover is worn or broken. In such a case, it is done by simply pressing the latch with your thumb possible to unlock the buckle. Such a feature is of course a safety factor in the event of an accident.

Of course, the materials currently used in this field can also be used to manufacture use belts according to the invention. Most of all, you will find that the pushbutton does not use high forces is acted upon, for example, can be made of plastic.

A belt buckle analogous to that shown in FIG. 1 has already been produced in the standardized dimensions, and she showed excellent behavior in operation.

Furthermore, tests have shown that such a belt withstands a tensile force of 2500 kg, whereby the user the buckle can unlock with a belt tension of 75 kg with a pressure of 6 kg.

It goes without saying that the invention is not limited to the exemplary embodiments expressly described and explained limited, but various changes can be made within the scope of the invention.

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Claims (11)

SECURAIGLON SA
Trelaze, Maine-et-Loire / France BUCKLE FOR SEAT BELTS Claims Buckle for seat belts or belt systems, which consist of a buckle tongue and a housing consists, which essentially consists of a housing base and parallel side walls is, which in their upper part at least partially extend to the Gfihäuspinneren, as well as from Sections that are bent over in a plane parallel to the housing bottom to form guide rails and which has at least one locking lever hinged to the side walls, which has at least one blocking or ... 12 909832/07 61 ORIGINAL INSPECTED has locking part for the buckle tongue as well as a support surface, wherein the housing furthermore has actuating devices for release, which consist of a push button with lateral guides which interact with the guide rails, and furthermore has a cutout on the rear side that is delimited by two side surfaces, wherein the two side surfaces each have two guide bevels parallel to one another, CHARACTERIZED in that the guide bevels (20, 20 ') interact without any further intermediate element with lugs (21, 21') which are fixed to the support surface (II) of the V locking lever (3 ) are connected. 2. A buckle according to claim 1, characterized in that the lateral walls (6, 6 ¹⁾ of the housing (2) comprises two lower wall sections (6a, 6'a) and two upper wall sections (6b, 6'b), wherein the distance between the lower wall sections is smaller than the distance between the upper wall sections, which in turn is essentially equal to or slightly larger than the greatest width of the locking lever (3). 3. Buckle according to claim 1 or 2, CHARACTERIZED in that the locking lever is attached in the housing via two side parts (4, 4 ') which have opposite openings (5, 5') in the side walls 6, 6 ^f ) of the housing cooperate. 4. A buckle according to claim 3, characterized in that the openings (6, 6 ') of the housing are formed in the lower wall sections (6a, 6'a) and at least 909832/0761 partly in the upper wall sections (6b, 6'b) of the Housing are bent. 5. A buckle according to any one of claims 1 to 4, characterized in that the locking lever (3) comprises two locking parts (8, 8 ') which lie on both sides of the bearing surface (11), extending downwardly and to the rear faces (9, 9 ') of a buckle mandrel (10) cooperate on the buckle tongue (1). 6. A buckle according to one of claims 1 to 5, characterized GEICENNZEICHNET that the locking lever can be held by elastic means in its locked position, which the support surface (11) towards the bottom (2 ') of the housing (2) Exerts force. 7. Buckle according to claim 6 _S CHARACTERIZED in that the elastic device is a spring wire (12) with a central part (13) which is on the support surface (11) supports, and with ends (14th, 14 ") that fit into openings (15, 15 ') engage in the lateral lower wall sections (6a, 6'a) of the housing (2). In that the lower end of the guide bevels (20, 20 ') retaining stops (22' 22 ') has 8. A buckle according to one of claims 1 to 7, characterized GEKENNZEKCHNET. 9. Buckle according to one of claims I bis'8, CHARACTERIZED in that the push button (16) has a protruding part (25) in its rear section, "../4 909832/0761 on which a spring (24) is arranged, the other end of which rests on a projection (26) of the housing whose rear end is supported. 10. buckle is included according to one of claims 1 to 9, characterized in that the housing bottom has (2 ') has a recess in which a spring (23) and held, which through the buckles mandrel (10) of the tongue (1) in Locking position is compressible. 11. Buckle according to one of claims 1 to 10, characterized in that a tab in the wall of the housing (28) is formed, which protrudes inward and is in the locking position partially above the buckle end (10) extends. 909832/0761