WEBBING STRAP DEVICE OF ADJUSTABLE LENGTH AND FUNCTIONAL DEVICE HAVING A WEBBING STRAP DEVICE

Abstract

A webbing strap device of adjustable length include an adjustment strap anchor, an adjustment loop anchor with an adjustment loop eyelet, a ladder-shaped sliding body with a first frame crossbar, a second frame crossbar spaced from the first frame crossbar and at least two intermediate crossbars arranged between the first frame crossbar and the second frame crossbar, and a webbing strap attached to the first frame crossbar and to the adjustment strap anchor. The webbing strap extends through the slider between the at least two intermediate crossbars to form an adjustment loop. In the region of the adjustment loop, the webbing strap extends through the adjustment loop eyelet.

Claims

1. A webbing strap device of adjustable length, comprising an adjustment strap anchor, an adjustment loop anchor with an adjustment loop eyelet, a ladder-shaped slider with a first frame crossbar, a second frame crossbar spaced from the first frame crossbar, at least two intermediate crossbars arranged between the first frame crossbar and the second frame crossbar, and at least three strap openings for guiding through of a webbing strap, and a webbing strap attached to the first frame crossbar and to the adjustment strap anchor, wherein the webbing strap extends through the slider between the at least two intermediate crossbars to form an adjustment loop, and wherein in the region of the adjustment loop, the webbing strap extends through the adjustment loop eyelet, wherein the webbing strap passes through each of the strap openings at most once and has a slider loop for fixing to the first frame crossbar.

2. The webbing strap device as claimed in claim 1, wherein the webbing strap extends through the slider adjacent to the second frame crossbar (9), between this and the at least two intermediate crossbars.

3. The webbing strap device as claimed in claim 1, wherein adjacent passages of the webbing strap through the slider are separated from each other by means of one of the at least two intermediate crossbars.

4. The webbing strap device as claimed in claim 1, wherein the webbing strap runs around the at least two intermediate crossbars only on one side.

5. The webbing strap device as claimed in claim 1, wherein the webbing strap is formed as one piece.

6. The webbing strap device as claimed in claim 1, wherein the webbing strap is formed so as to be elastic and has a stretch elongation of at least 10%.

7. The webbing strap device as claimed in claim 1, wherein the webbing strap one of the group comprising an anchor loop and an anchor bead for fixing to the adjustment strap anchor.

8. The webbing strap device as claimed in claim 1, wherein the webbing strap comprises a thermoplastic.

9. The webbing strap device as claimed in claim 1, wherein the first frame crossbar, the second frame crossbar and the at least two intermediate crossbars are arranged in one crossbar plane.

10. The webbing strap device as claimed in claim 1, the slider has a positioning aid for at least one of the group comprising automatable alignment and fixing of the slider.

11. The webbing strap device as claimed in claim 10, wherein the positioning aid is arranged on the first frame crossbar.

12. The webbing strap device as claimed in claim 1, wherein at least one of the group comprising the first frame crossbar and/or the second frame crossbar and/or the at least two intermediate crossbars have a crossbar knurling to increase the friction exerted against the webbing strap.

13. The webbing strap device as claimed claim 1, wherein the slider has two frame struts which are each connected to the first frame crossbar, the second frame crossbar and the at least two intermediate crossbars, wherein at least one of the two frame struts has a frame knurling for easier sliding.

14. A functional device, comprising a webbing strap device as claimed in claim 1, and a functional element on which the adjustment strap anchor and the adjustment loop anchor are arranged.

15. The functional device as claimed in claim 14, wherein the functional element comprises at least one of the group comprising a face protection element and an eye protection element and/or a respiratory protection element.

Description

BRIEF DESCRIPTION OF THE DRAWING

[0037] FIG. 1 shows a perspective depiction of a functional device according to the invention with a functional element and a webbing strap device arranged thereon,

[0038] FIG. 2 shows a diagrammatic, sectional view of the webbing strap device from FIG. 1 with an adjustment strap anchor, an adjustment loop anchor, a ladder-like slider and a webbing strap,

[0039] FIG. 3 shows a perspective depiction of the slider of the webbing strap device from FIG. 1, and

[0040] FIG. 4 shows a diagrammatic sectional view of a webbing strap device with an adjustment strap anchor, an adjustment loop anchor, a ladder-like slider and a webbing strap according to a further exemplary embodiment, wherein the webbing strap has an anchor bead for attaching to the adjustment strap anchor.

DESCRIPTION OF THE PREFERRED EMBODIMENT

[0041] A functional device it according to FIG. 1 comprises a functional element 2 and a webbing strap device 3 arranged thereon. The functional element 2 is configured as an eye protection element. The functional device 1 is a pair of protective goggles, in particular full vision goggles.

[0042] The webbing strap device 3 comprises an adjustment strap anchor 4 and an adjustment loop anchor 5. The webbing strap device 3 is attached to the functional element 2 via the adjustment strap anchor 4 and the adjustment loop anchor 5. The adjustment strap anchor 4 and the adjustment loop anchor 5 are connected to the functional element 2 by substance bonding and hence fixedly. The webbing strap device 3 thus forms a head band for fixing the functional device 1 to the head.

[0043] The webbing strap device 3 furthermore comprises a ladder-like slider 6 and a webbing strap 7. The webbing strap 7 passes repeatedly through the slider 6, wherein the slider 6 can be moved relative to the webbing strap 7 in order to adjust a length of the webbing strap device 3 between the adjustment strap anchor 4 and the adjustment loop anchor 5.

[0044] The slider 6 comprises a first frame crossbar 8, a second frame crossbar 9 spaced from the first frame crossbar 8, and two intermediate crossbars 10 arranged between the first frame crossbar 8 and the second frame crossbar 9. The first frame crossbar 8, the second frame crossbar 9 and the two intermediate crossbars 10 are connected at both ends to a respective frame strut 11. The first frame crossbar 8, the second frame crossbar 9, the two intermediate crossbars 10 and the two frame struts 11 are arranged in a common crossbar plane 12. The two frame struts 11 together with the first frame crossbar 8 and the second frame crossbar 9 form a completely closed frame. The first frame crossbar 8, second frame crossbar 9 and the two intermediate crossbars 10 are oriented parallel to each other. The slider 6 is made from a plastic, in particular a thermoplastic.

[0045] The two frame struts each have a frame knurling 13 on an outside of the slider 6. The respective frame knurling 13 is configured such that the slider 6 can easily be moved by hand relative to the webbing strap 7.

[0046] The second frame crossbar 9 and the two intermediate crossbars 10 each have a crossbar knurling 14. The crossbar knurling 14 is arranged on a respective inside of the second frame crossbar 9 and the two intermediate crossbars 10, in particular in the direction of a geometric central point of the slider 6. The crossbar knurlings 14 are configured such that the coefficient of friction formed between the slider 6 and the webbing strap 7 is increased.

[0047] A positioning aid 15 is arranged on the first frame crossbar 8. The positioning aid 15 is formed as a bar-like protrusion and oriented parallel to the first frame crossbar 8. The positioning aid 15 is arranged on a top side 16 of the slider 6 facing away from the functional element 2.

[0048] At its first end, the webbing strap 7 has a slider loop 17, and at its second end an anchor loop 18. The slider loop 17 and the anchor loop 18 are each formed by stitching 19. The webbing strap 7 is attached to the adjustment strap anchor 4 by the anchor loop 18. For this, in the region of the anchor loop 18, the webbing strap 7 passes through an adjustment strap anchor eyelet 20 of the adjustment strap anchor 4 and back to a first stitching point.

[0049] The slider 6 has a first strap opening 21 surrounded by the first frame crossbar 8, the intermediate crossbar 10 adjacent thereto, and the two frame struts 11. The slider 6 has a second strap opening 22 framed by the second frame crossbar 9, the intermediate crossbar 10 adjacent thereto, and the two frame struts 11. The slider 6 has a middle strap opening 23 surrounded by the two intermediate crossbars 10 and the two frame struts 11. The webbing strap 7 is attached to the first frame crossbar 8 by the slider loop 17. For this, in the region of the slider loop 17, the webbing strap 7 passes through the first strap opening 21 and is guided back to a second stitching point.

[0050] The webbing strap 7 is guided through the middle strap opening 23. Between the first strap opening 21 and the middle strap opening 23, the webbing strap 7 extends in the form of an adjustment loop 24. For movable fixing of the webbing strap 7, the adjustment loop anchor 5 has an adjustment loop eyelet 25. In the region of the adjustment loop 24, the webbing strap 7 is guided through the adjustment loop eyelet 25.

[0051] Between the middle strap opening 23 and the anchor loop 18, the webbing strap 7 is guided through the second strap opening 22. The webbing strap 7 passes precisely once through each of the first strap opening 21, the second strap opening 22 and the middle strap opening 23. Adjacent passages 26 of the webbing strap 7 through the slider 6 are thus separated from each other by a respective one of the two intermediate crossbars 10. The webbing strap 7 runs round each of the two intermediate crossbars 10 on one side.

[0052] The webbing strap 7 is formed elastically. A stretch elongation of the webbing strap 7 is at least 10%. The webbing strap 7 is also formed as one piece. The webbing strap 7 is made from a textile material, preferably in a weaving process. The webbing strap 7 comprises a thermoplastic. Fraying of the webbing strap 7 is prevented by melting of the thermoplastic in the region of the two cut ends 27.

[0053] The function of the webbing strap device 3 of adjustable length, or of the functional device 1 with this webbing strap device 3, is as follows:

[0054] To attach the functional device 1 to the head, the functional element 2, in particular the eye protection element, is arranged in front of the face. The webbing strap device 3 is laid around the head, wherein it extends from the adjustment loop anchor 5, behind the head and up to the adjustment strap anchor 4. To adjust the webbing strap device 3 to the respective size of the head, the length of the webbing strap device 3 is adjustable.

[0055] In the region of the adjustment loop 24, between the slider loop 17 and the adjustment loop anchor 5, the webbing strap 7 is doubled. Between the adjustment strap anchor 4 and the second strap opening 22, the webbing strap 7 has merely a single layer. By moving the slider 6 relative to the webbing strap 7, the length of the webbing strap device 3 can be adjusted. Enlarging the adjustment loop 24 leads to a reduction in the length of the webbing strap device 3. Reducing the size of the adjustment loop 24 leads to an increase in length of the webbing strap device 3.

[0056] The slider 6 is moved relative to the webbing strap 7 manually, wherein the frame knurlings 13 facilitate the movement.

[0057] The length of the webbing strap device 3 is set such that the webbing strap 7, in particular with stretching, lies firmly against the head. The crossbar knurlings 14 guarantee an increased friction between the slider 6 and the webbing strap 7, and prevent an undesirable displacement of the slider 6 relative to the webbing strap 7.

[0058] FIG. 4 shows a webbing strap device 3 according to an alternative exemplary embodiment. The webbing strap device 3 differs from the embodiment described above in that the webbing strap 7 is attached to the adjustment strap anchor 4 by means of an anchor bead 28. The anchor bead 28 comprises several layers of the webbing strap 7 laid one above the other. The multiple layers of the webbing strap 7 laid one above the other are fixedly connected together by stitching 19. For passage of the webbing strap 7, an eyelet width d of the adjustment strap anchor eyelet 20 is greater than the thickness of the webbing strap 7. A bead thickness D of the anchor bead 28 is in turn greater than the eyelet width d. This guarantees that the webbing strap 7, which is guided through the adjustment strap anchor eyelet 20, is connected by form fit to the adjustment strap anchor 4. The function of the webbing strap device 3 according to the alternative exemplary embodiment corresponds to the function of the webbing strap device 3 described above.

[0059] The design of the webbing strap device 3 according to the invention guarantees a reduction in the production cost and allows automated production. In particular because the webbing strap 7 passes only once through each of the openings of the slider 6, in particular the first strap opening 21, the second strap opening 22 and the middle strap opening 23, the one-piece webbing strap 7 can automatically be guided between the adjustment strap anchor 4, the adjustment loop anchor 5 and through the slider 6. The production process of the webbing strap device 3 thereby becomes particularly robust and economic.