SNAP FASTENING DEVICE

Abstract: A snap fastening device of plastics is intended to detachably join two bodies (15, 16) to each other. According to the invention said snap fastening device is integrally formed and comprises a holding part (2) and a snap fastening part (3). The holding part consists of at least a substantially displaceable sholder (4, 5) faced towards said snap fastening part. The snap fastening part consists of two elastic shanks (7, 8), which project from said holding part and which form projections (9, 10) on their sides faced from each other.

Description: Snap fastening, device _ . - The present invention is related t-o a snap fastening device of plastics intended to detachably joint two bodies to each other. The object of the invention is to provide a snap fastening device, in which a good holding effect of said bodies is obtained so that they are not displaced sidewards. Another object of the invention is to provide a snap fastening device, which is simple to its function and which is well anchored in one of said two bodies. The objects is obtained according to the invention by a snap fastening device which is integrally formed and comprises a holding part and a snap fastening part, said holding part consisting of at least one towards said snap fastening part faced, substantially displaceable sholder, said snap fastening part consisting of two from the holding part projecting, elastic shanks, which have projections on the sides faced from each other. Preferred embodiments of the invention have been given the characteristics in the subclaims. The invention is to be described better in the following with reference to the accompanying drawings showing preferred embodiments. Fig. 1 is a perspective view of a first embodiment of a snap fastening device according to the invention. Fig. 2 is a section through two profiles attached to each other, said profiles being fastened to each other by means of a snap fastening device according to fig. 1. Fig. 3 is a second embodiment of a snap fastening device according to the invention. A snap fastening device 1 according to the invention consists of a holding part 2 and a snap fastening part 3, said holding part consisting of two sholders 4, 5 and a V-formed web 6 connecting said sholders to each other. Said snap fastening part 3 consists of two shanks 7, 8, which can be elastically pressed towards each other, and projections 9, 10 formed on each shank. The projections have upper inclined surfaces 11, 12 and lower inclined surfaces 13, 14. The elastic shanks 7, 8 can be elastically pressed towards each other and return thereafter to their original positions. While placing the web 6 as shown in the drawing at the same level as the sholders 4, 5 " , the effect will be that the sholders 4, 5 will not be displaced from their mutual positions even if the shanks 7, 8 are pressed together. OMPI In fig. 2 it can be seen how the snap fastening device according to the invention Is used to hold two profiles 15, 16 to each other, which are intended to be hold detachably to each other displaceably sidewards. As can be seen in fig. 2 the holding part of said snap fastening device 1 is introduced in a track 17 in said profile 15 so that the sholders 4, 5 abuts against flanges 18, 19 at the opening of said track. The profile 16 can be brought to abutment against or be detached from said profile 15 in directions showed by a double arrow. When the upper profile 16 is to be brought to abutment against the lower profile 15 and be fastened thereon two flanges 21 and 22 at the opening of a track 23 are pressed against said projections 9 and 10 over inclined sides 11, 12, said shanks 7 and 8 being elastically pressed against each other so that the snap fastening part can be introduced between the flanges 21, 22 into said track 23. When the profile 16 is to be removed from said profile 15 the flanges 21, 22, in the same way, are pressed against the inclined lower surfaces 13, 14 of said projections 9 and 10 so that they elastically move against each other and the snap fastening part can be moved out through said opening between said flanges 21, 22. The snap fastening device according tα the invention, which preferably is extruded integrally from a plastic material, can for instance be formed in long lengths and be cut to proper lengths thereafter. In fig. 3 another embodiment of the snap fastening device 1 according to the invention is shown, in which details similar to details in the embodiment of fig. 1 have been given the same references. This snap fastening device has a web 24 which differ substantially from the V-formed web 6 of the embodiment according to fig. 1. With this broad web 24 according to the embodiment of fig. 3 a more stabile snap fastening device is obtained, in which the sholders 4 and 5 are completely locked in their positions and the elastic resistance in the shanks 7, 8 is substantially greater. The projections 9 and 10 can of course be formed in other ways. Instead of plane surfaces 11, 12, 13, 14 a curved surface can be provided, e.g. a hemi-cylindrical surface, said curved surface being such that substantially the same effect is obtained as with the plane surfaces in the embodiments according to fig. 1 and 3. The invention can of course be modified further within the scope of the accompanying claims.

Claims: " CLAIMS 1. A snap fastening device of plastics intended to detachably join two ' bodies (15, 16) to each other, characterized in that said device is integrally formed and comprises a holding part 2 and a snap fastening part (3), said holding part consisting of at least one substantially displaceable sholder (4, 5) faced against said snap fastening part, said snap fastening part consisting of two plastic shanks (7, 8), which project from said holding part and which form projections (9, 10) on their sides faced from each other. 2. A device according to claim 1, characterized in that said holding part has two sholders (4, 5) which are provided on each side thereof. 3. A device according to claim 1 or 2, characterized in that said projections (9, 10) each consists of two surfaces, which join each other and of which the upper (11, 12) is inclined outwardly downwardly and the lower (13, 14) is inclined upwardly outwardly. 4. A device according to any of claims 1-3, characterized in that said shanks (7, 8) are connected to each other by means of a web (6, 24) formed substantially at the same level as said sholders. 5. A device according to claim 4, characterized in that said web (6) is V-formed. 6. A device according to claim 4, characterized in that said web (24) is substantially rectangular in section.

Inventors: AHLBERG ERIK OLA, BECKROT ANDERS VALTER, AHLBERG, ERIK, OLA, BECKROT, ANDERS, VALTER
Applicants: AHLBERG BECKROT YTTER AB
Application year: 1982
Main classification: E04B1
IPC codes: F16B5