Buckles – buttons – clasps – etc. – Separable-fastener or required component thereof – Including member having distinct formations and mating...
Patent
1993-09-01
1995-04-18
Brittain, James R.
Buckles, buttons, clasps, etc.
Separable-fastener or required component thereof
Including member having distinct formations and mating...
245735, A44B 1126
Patent
active
054066816
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a buckle for a safety belt, particularly a child's belt of the type used in combination with a child's chair which is located on a seat and is anchored to the car.
The buckle according to the invention comprises a buckle housing and a lock tongue constructed to be connected each to one strap part, the lock tongue being insertable into a guide in the buckle housing which has a latch member spring biased to lockingly engage the inserted lock tongue, and an operating member to be operated manually for switching the latch member from an engaged position to a disengaged position against the spring bias.
Buckles of this general kind are disclosed in U.S. Pat. Nos. 3,686,720, 4,677,715, and 4,408,373.
In the buckle disclosed in U.S. Pat. No. 3,686,720, the latch member and the operating member consist of a first limb and a second limb, respectively, of a U-shaped element, which is pivotally mounted in the buckle housing to swing about a transverse axis, with the limbs extending along the guide towards the insertion opening for the lock tongue which at the insertion into the buckle housing can be pushed in between the limbs.
In the buckle disclosed in U.S. Pat. No. 4,677,715, the spring bias consists of a pressure spring mounted between the limbs of a U-shaped element. One end of the pressure spring is attached to a stud protruding inwardly from the upper limb of the U-shaped element, and the other end of the spring is mounted on a stud protruding from a separate sliding block which is guided for linear movement in the belt housing. The sliding block is caused to move by inserting a lock tongue into the housing, thereby exerting a pushing action on said sliding block.
In the buckle disclosed in U.S. Pat. No. 4,408,373, the lock housing is provided with grooves for guiding the lock tongue when inserted therein.
It is the intention to provide by the invention a buckle of this kind which combines an extremely uncomplicated construction with high safety and reliability and wherein the uncomplicated construction is achieved by the buckle consisting of very few elements which are of a simple construction and are mounted together in a simple manner. As a consequence thereof the buckle can be made small and light, which is desired as far as buckles for a child's belt is concerned.
An embodiment of the buckle according to the invention will be described below reference being made to the accompanying drawings in which
FIG. 1 is an exploded perspective view of a child's buckle for a belt having a crotch strap and two shoulder straps,
FIG. 2 is a vertical cross sectional view of the buckle in FIG. 1, and
FIG. 3 is a vertical cross sectional view similar to FIG. 2 of a buckle of a slightly modified embodiment.
The buckle comprises a buckle housing 10 of generally parallelepiped configuration which can be injection moulded of a suitable plastic material and has at one end thereof a cross bar 11 to be connected at said cross bar to a crotch strap forming part of a child's belt, said part extending downwards between the child's legs and is fixedly anchored below. The buckle housing forms at the other end thereof a slot opening 12 for insertion of two lock tongues 13 and 14 which shall be connected each to one shoulder strap. Inside the buckle housing there is provided along each of the opposite sides of the housing a linear guide groove 15 for guiding the lock tongues when they are inserted into the buckle housing through the opening 12. In one of the flat sides of the buckle housing an opening 16 is provided. A U-shaped element 17 stiffened by means of a flange 18 extending between the two limbs 19 and 20 of the element and along said limbs, is inserted into the buckle housing through the opening 16 and is pivotally mounted in the buckle housing by means of a pin 21 which is inserted transversely of the buckle housing into apertures 22 therein and extends through an aperture 22A in the element 17, said latter aperture being located in the transition between the web of the element and the limb 19. The lim
REFERENCES:
patent: 3378895 (1968-04-01), Eberhart
patent: 3686720 (1972-08-01), Wehner
patent: 4408373 (1983-10-01), Miskowicz
patent: 4677715 (1987-07-01), Escaravage
Brittain James R.
Broderna Holmbergs Fabriks AB
Mason, Jr. Joseph C.
Smith Ronald E.
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