CZ297497A3 - Stick blade for hall hockey - Google Patents

Abstract

A bandy stick comprises a blade whose striking area comprises a rim 1, ribs 2 and an area which consists of a network of tensioned strings. The strings may be so positioned that the form a generally concave structure. In an alternative embodiment a central contact surface 9 is supported in the blade frame by string 8.

Description

Blade sticks for indoor field hockey

Technical field

The present invention relates to an indoor hockey or floorball stick blade having an edge reinforced area.

BACKGROUND OF THE INVENTION

Field hockey blade blades are usually made of plastic by molding. The thermoplastic material, or thermosetting plastic, capable of being cast into a mold, usually has a low modulus of elasticity and, in order to achieve sufficient strength or stiffness, the blade must be made of a solid piece of material. However, not all players prefer the same blade stiffness and therefore they are made of two different materials, one more stiffer than the other. Therefore, when ordering a field hockey stick, the player can choose the strength of the stick blade.

The rules of ground hockey or floorball reserve certain limits regarding the shape of the blade, acceptable height, thickness and similar dimensions of the blade, however the weight of the blade is not determined. Solid plastic material with minimum thickness and maximum height would be impractically heavy for a lightweight ball.

that is used in the game. Therefore, the blades are provided with different types of holes (rib construction), which is intended to reduce the weight of the blade while maintaining sufficient strength. The plastic rib structure is provided over the entire surface of the blade and is bounded by an edge, frame or edge so as to achieve both bending and torsional strength.

Patent application SE-412318 discloses a ball game stick, preferably a golf club, the entire surface of which is bounded by the edge reinforcement and further provided with reinforced horizontal strings. Because of the blade of the field hockey stick, which is relatively long in relation to its height, this arrangement is unsatisfactory due to insufficient torsional strength unless the edge reinforcement is made sufficiently massively, which is disproportionate. Neither of the above-mentioned construction methods allows the construction of the stick blade other than the flat.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION The object of the present invention is to provide an indoor hockey stick blade that has improved flexibility and is lighter than a conventional stick blade without sacrificing the required bending and torsion strength, and further, the contact surface of the stick blade is constructed with shapes that will be different than flat.

This object is achieved according to the invention, which consists of a blade for a field hockey stick, with a touch surface bounded by the main frame, where part of the blade surface is covered with thin pre-stressed strings and another part of the surface

The blade is covered with ribs attached to the main frame or covered with a center plate with a contact surface attached to the main frame by means of strings. At least a portion of the blade surface is provided with prestressed strings forming a string surface whose location is deflected relative to the central surface of the blade. The sides are further directed transversely to form two stringed surfaces intersecting each other at an acute angle.

Preferred embodiments of the invention for its use are described in the dependent claims.

Several embodiments of the invention will now be described in more detail with reference to the accompanying drawings, in which: FIG

Fig. 1 shows a side blade of an indoor field hockey or floorball stick according to a first embodiment of the present invention in side view;

Fig. 2 shows the complete stick in side view,

Fig. 3 shows an example of one possible embodiment of a cross section of a stick blade;

Fig. 4 shows another example of one possible embodiment of the cross section of the stick blades,

Giant. 5 shows another different example of one possible embodiment of a cross section of the stick blades,

Fig. 6 shows a side blade of an indoor field hockey or floorball stick according to a second embodiment of the present invention in side view.

DETAILED DESCRIPTION OF THE INVENTION

The stick blade may be injection molded from a thermoplastic or thermosetting material, in addition to the region of the center of the stick blade, the structure and use of which will be described later. The stick blade may also be made of a composite material, i. of fiber-reinforced plastic or of fibers saturated with epoxy resin (matrix). These fibers may be, for example, either vitreous or carbon. Other materials such as metals or ceramics may also be acceptable. The blade of the pole is composed of a main frame 1 or an arm that forms the edge reinforcement, and parts of the string frame 2 and 4 having longitudinal portions which, in the case of Fig. 1, are attached directly to the upper and lower longitudinal portions of the main frame 1. it comprises the cross-section 4 of the string frame which are connected by longitudinal ribs 2 to those parts of the main frame 1 which define the ends of the blade. In addition, there may be one or more additional transverse ribs 2a. The main frame 1 may be provided with a relief recess 1a or a cavity 17 as shown in Fig. 3 to Fig. 5.

The parts of the string frame 2 and 4 are provided with slots 7 or protrusions, hooks or other fasteners for tightening the thin strings 5 and 6 in the same manner as similar strings are stretched and retained on the tennis racket. Of course, the material of these strings and their method of attachment may vary. Preferably, the strings consist of an elastic string, for example similar to that used again in tennis rackets. However, metal, ceramic, silicone and other such strands may also be acceptable. The strings may be strands of one strand, or they may be stranded. What is essential for these strings is that they can be stretched to form an area bounded by the parts of the trim frames 1 and 4 with a lightweight and preferably flexible string face capable of providing a good ball bounce from the blade, and further able to accommodate individual string requirements. In addition, the prestressing created by the stretched strings makes it possible to construct the surrounding plastic element lighter than would be the case with a conventional pole, because the tension caused by the strings also supports the surrounding plastic material.

The area bounded by the parts of the trimmer frame 2 and 4 may be positioned as desired, and its size may also be selected as required. However, it is usually located in the central region of the stick blade. The string face only forms part of the contact surface of the pole, the rest being formed by the string frame, the main frame and the ribs 2 and 2a. that are stretched between him.

The strings can be stretched rectangularly or diagonally across the cross to create a good touch surface and, in addition, split the preloading effect onto the plastic material of the stick blade. The strings may also be stretched parallel to each other, thereby placing them in the same plane, or the strings may create divergent planes of strings, relative to each other.

When stick blades are manufactured with different reflectance parameters, with different preloads on the strings, blades that differ in this way from each other may be

• · · Numbered.

From a ball control perspective, it is preferred that the stick blade be concave on one or both of its foreheads. This can be achieved by adjusting the thickness of the ribs 2 by weakening them on one side or both sides towards the center. By attaching the strings 5 and 6 so as to deflect them relative to the center plane of the main frame X, the strings can be made with one-sided concavity. Even in the opposite embodiment, the tying methods and the string extending points may be used to effect the positioning of the string plane relative to the plane of the pole blade. Fig. 3 shows a one-sided grid structure. Of course, it could be replaced by a strings plane formed by parallel strings. Fig. 4 shows a plane of strings, here parallel strings 6, contained in the central plane of the pole blade, which of course can be replaced by a grid structure. Fig. 5 shows divergent string planes established by the vertical strings 6 and intersecting each other in the longitudinal central region of the pole blade. The advantage offered by this embodiment is that the actual forehead is concave. The shape and elasticity of the forehead can be influenced by the longitudinal strings X, or by doubling the cross strings 6 in the area of the crossing.

In the case of FIG. 6, the contact surface on the middle surface of the pole blade is formed by a string frame supported by cross ribs or a fixed central plate 2, which is fixed to the main frame X by the strings X stretched there. Thus, the central plate 2 functions as an effective reflective surface. In this case too, the contact surfaces may be provided

one-sided or two-sided concavity, if the center plate 2 is flatter than the main frame 1 and is fixed as required, relative to the center plane of the cane blade using principles such as those shown in Fig. 3 to Fig. 5. one stringable string string 8 is extended into recesses formed in the main frame 1 and the center plate 2 and provided with pins 21. It is also possible to attach the string strands to the main frame 1 permanently by inserting the string attachment points into the molded plastic material while the strands are fixed by insertion. suitable center plates 2 between the string strands.

The stick blade outlined in the present disclosure, in the embodiment of the invention, is of superior quality to those known from the prior art because, despite its lightness, it is sufficiently strong and flexible plastic so that the ball leaks away from the blade very well and this ensures a good feel for the ball.

The invention is not limited to the above description of the examples, also shown in the drawings, however, the details of construction and structure may vary in many respects. For example, the integral parts of the string frame 2 and 4 are not necessary, but instead the strings may be stretched into the individual heads of the ribs 2 or parts of the frame interconnecting several ribs 2. The string region may not have an edge shape that is uniformly integral, be longer, some shorter.

Claims (11)

An indoor hockey stick blade having an area bounded by a main frame (1), characterized in that a portion of the blade surface is covered with thin prestressed strings (5, 6, 8) and another portion of the blade surface is covered with ribs (2, 2a) fixed to the main frame (1) or covered by a center plate (9) with a touch surface, fixed to the main frame (1) by means of strings (8). Indoor hockey stick blade having an area bounded by the main frame (1), characterized in that at least a portion of the blade surface is provided with prestressed strings (5, 6) forming a string surface whose position is deviated relatively relative to the central surface of the blade. Indoor hockey stick blade having an area bounded by the main frame (1), characterized in that at least a portion of the blade surface is provided with prestressed strings (6, 8) which are directed transversely to form two string areas crossing each other at an acute angle. Indoor hockey stick blade according to any one of claims 1 to 3, characterized in that the strings formed by the strings (6, 8) biased across the stick blade are divergent relative to each other. Indoor hockey stick blade according to any one of claims 1 to 4, characterized in that the center plate (9) of the touch surface, fixed by means of strings (8) to the main frame (1), consists of an elongated rigid plate, located in the center of the blade surface, or from a frame supported by ribs. Indoor hockey stick blade according to any one of claims 1 to 4, characterized in that the main frame (1) is adapted to be inserted directly and / or by ribs (2) with parts of the string frame (3, 4). ), which are provided with fastening elements which are formed by slots (7), projections or hooks for biasing the flexible strings (5, 6) thereon over a surface bounded by parts of the string frame (3, 4). Indoor hockey stick blade according to claim 6, characterized in that the area bounded by the parts of the string frame (3, 4) is located in the longitudinal direction of the blade in the region of the central surface of the blade and forms only a part of the contact surface of the blade; then formed by the parts of the string frame (3, 4), the main frame (1) and the ribs (2) extending therebetween. Indoor hockey stick blade according to any one of claims 1 to 7, characterized in that the strings (5, 6) are elongated crosswise and use a bias to reinforce the blade surrounding the string surface. Indoor hockey stick blade according to any one of claims 1 to 8, characterized in that the blades of different reflectance are produced using different preload of the strings (5, 6, 8). 10. Blade sticks for indoor field hockey according to -40 .. according to any one of claims 1 to 5, characterized in that the blade has a concave shape on one side. Indoor hockey stick blade according to any one of claims 1 to 9, characterized in that the main frame (1) has a cavity (1b) formed at least over a portion of its length.