RU2498749C2 - Buckle for belt length adjustment - Google Patents

Abstract

FIELD: personal use articles.

SUBSTANCE: buckle for belt length adjustment contains a flat detail with a tail piece and at least one belt gap and a frame. The flat detail is designed in the form of clip the tail piece whereof is confined within the frame designed in the form of a bracket with a roller mounted thereon. The tail piece surface turned towards the belt is equipped with cogged projections and a crosswise groove. The tail piece is positioned at an angle to the gap surface; on the clip surface there are projections and props positioned, interacting with each other; the clip is made of a polymer material. For the belt tightening and release a force is applied to the belt free end at different angles.

EFFECT: ensuring enhanced reliability of a varied thickness belt fixation and improved operation convenience.

4 cl, 7 dwg

Description

The invention relates to the class of haberdashery products and is intended for use, for example, as a combination tightening buckle for assembling the front parts of various gas masks that work in all climatic zones of Russia at ambient temperatures from minus 40 ° C to plus 40 ° C.

Known buckle, consisting of two frame elements located one on the other with the possibility of covering one of the sides with the fixed end of the belt. One of the frame elements covered by the movable end of the belt is made with protrusions formed by the extension of the side opposite the covered by the fixed end of the belt (journal "Tourist" N 12, p.47, 1990).

A disadvantage of the known design is the inconvenience of use.

Also known is a buckle containing two frame elements located one on the other with the possibility of covering one of the sides with the fixed end of the belt, while one of the frame elements covered by the moving end of the belt is made with protrusions formed by a continuation of the side opposite the covered by the fixed end of the belt, characterized the fact that in order to improve ease of use by reducing the effort when unlocking the belt, the protrusions are directed from the side covered by the fixed end of the belt. In the buckle, the protrusions are made at an angle to the plane of the frame, and in each of the protrusions there is a ring configured to be gripped by fingers (Pat. RF No. 2063156, IPC A44B 11/18, 1996).

The disadvantage of wire buckle is as follows. Firstly, the cylindrical surface of the frame does not create sufficient friction for the belt, as a result of which the belt begins to slip through the buckle even at relatively small loads. In addition, a narrow wire frame with rounded sides easily falls into the window of a flat part, which leads to distortions of the belt in the buckle and the inability to further adjust its length. Secondly, the shape of the shank of a flat part is rather inconvenient for putting it in a perpendicular (relative to the surface of the belt) position when adjusting the length of the belt in the direction of its increase, especially with a gloved hand.

A buckle for adjusting the length of the belt is also known, comprising a flat part with a shank and at least one window for the belt and a frame, the frame being made flat with rectangular edges and an opening made in the shank of the flat part. In this buckle, the window width in a flat part exceeds the frame width by an amount equal to the thickness of the adjustable belt (Pat. RF No. 2079279, IPC A44B 11/00, 1997).

The disadvantage of this design is the lack of reliability of the fixation of the belt with a decrease in its thickness due to wear or deformation under the action of loads.

The objective of the invention is to increase reliability by increasing the friction of the belt in the buckle during tightening, as well as the possibility of using buckles with different thicknesses and materials of the belt, as well as improving the convenience of adjusting the length of the belt by tensioning its free end, which is especially important when using the buckle in personal protective equipment respiratory organs.

The problem is achieved in that in the buckle for adjusting the length of the belt containing a flat part with a shank and at least one window for the belt and the frame, the flat part is made in the form of a clip, the shank of which is enclosed in a frame made in the form of a bracket with mounted on it roller, the surface of the shank facing the belt is provided with serrated protrusions and a transverse groove.

The shank can be made at an angle to the plane of the window.

On the surface of the clip can be made protrusion and stops that interact with the bracket.

The clip is made of polymer material.

The execution of a flat part in the form of a clip, the shank of which is enclosed in a frame made in the form of a bracket with a roller mounted on it, the surface of the shank facing the belt is equipped with serrated protrusions and a transverse groove, which provides:

- reliability due to the effect of self-tightening, which consists in the fact that with increasing force on the belt increases the friction force;

- the possibility of using belts in a wider range of thicknesses;

- the exclusion of belt slippage due to interaction with gear protrusions and bending in the transverse groove under the action of the roller;

- convenience of tightening and releasing the belt by tensioning its end: for tightening, the force is directed along the buckle and for releasing at an angle close to the straight line.

All this increases the reliability of the buckle and ease of use.

Running the shank at an angle to the plane of the window improves usability, since the shank does not interfere with grabbing the end of the belt for adjustment.

The execution on the surface of the clip protrusion and stops that interact with the bracket provides a fixation of the position of the bracket frame.

The implementation of the clips made of a polymer material provides increased ease of use at low and high temperatures and provides high quality in serial production due to more advanced technology.

The invention is illustrated by drawings, which depict:

figure 1 shows a General view of the buckle, side view;

figure 2 shows the same top view;

figure 3 shows the design of the clip, side view of a longitudinal section;

figure 4 shows a top view of the clip;

figure 5 shows the end view of the clip;

figure 6 shows the design of the frame;

in Fig.7 shows the same as in Fig.6, a cross section.

The list of items in these drawings.

1. Clip

2. Frame

3. Roller

4. Bracket

5. The window

6. Cross groove

7. Toothed ridges

8. Shank

9. Stops

10. The back of the clip

11. The protrusion.

The buckle for adjusting the length of the belt contains a clip 1, on the narrow part of which a frame 2 is mounted, made in the form of a roller 3 mounted on a bracket 4. The clip 1 can preferably be made of a polymer material such as acrylonitrile butadiene-styrene ABS copolymer, or PP-TM reinforced by hot pressing or injection molding. In clip 1, one or more windows 5 are made for fixedly fastening a belt (not shown), as well as a transverse groove 6 and serrated protrusions 7. The end of clip 1 opposite the window 4 is provided with a shank 8. The shank 8 is bent approximately 30- to the flat part 45 °. On the lower side of the clip are stops 9. The back of the clip 10 is made with a rounding of the lower edge. In addition to the stops 9, the protrusion 11 is also made on the clip 1, which, like the stops 9, limits the stroke of the lower part of the bracket 4. The bracket 4 is made flexible or stamped from carbon wire with a diameter of 2 to 4 mm, and the roller 3 is rolled from steel sheet with a thickness of 0.5 -0.8 mm. Protective galvanic coatings are applied to metal parts.

The operation of the buckle is as follows.

In the window 5 of the clip 1, a belt (not shown) is installed, which is fixedly fixed using known means (rivets, glue, stitching threads, etc.) around the rear part 10. The roller 3 is rotated relative to the lower part of the bracket 4 towards the window 5 and the free gap of the belt (not shown) is pushed into the resulting gap between the clip 1 and the roller 3. To tighten the belt, it is necessary to apply force to the end of the belt, after which it is automatically tightened. To release the belt, it is necessary to apply force to the end of the belt and hold the roller 3 in the retracted position. In this case, frame 2 is used as a lever to counteract the tension of the belt. By reducing the frictional force between the belt and clip 1, the belt is released. If the roller 3 is released, the belt will lock again. Thus, it becomes possible to gradually tension and bleed the belt.

This buckle is simple in design, reliable and technologically advanced and provides belt length adjustment and its automatic tightening.

Claims (4)

1. A buckle for adjusting the length of the belt, comprising a flat part with a shank and at least one window for the belt and a frame, characterized in that the flat part is made in the form of a clip, the shank of which is enclosed in a frame made in the form of a bracket with a roller mounted on it , the surface of the shank facing the belt is provided with serrated protrusions and a transverse groove. 2. The buckle according to claim 1, characterized in that the shank is made at an angle to the plane of the window. 3. The buckle according to claim 1, characterized in that on the surface of the clip there is a protrusion and stops interacting with the bracket. 4. The buckle according to claim 1, characterized in that the clip is made of a polymeric material.

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