JPS61115582A - Tennis racket - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention has a frame formed from a circular piece,
Both free ends of the circular member are treated or bent to form a grip, and at least one damping element is inserted and fixed between the two free ends of the circular member in the grip portion. It concerns tennis rackets. A tennis racquet of this type, made for example from an aluminum neem profile, has grips on both free ends thereof, which grips are coated with, for example, foam and/or foam.
Or it is finished by wrapping it with grip tape. In the case of tennis rackets, it is well known to make the grip hollow to allow weight transfer within the racket.

In the case of metal rackets, the vibration of the frame induced by the ball hitting the racket is disadvantageous (.

This is often transmitted to the grip and is the cause of so-called tennis elbow. From the end of the stretched string to the grip, various structures were installed at the center of the ball with the intention of dampening the vibrations induced by the ball to some extent, and as a result, the vibrations were no longer transmitted directly to the wrist. .

Tennis rackets of the type mentioned in the introduction are, for example, US-
It can be detected from PS3206204. This known construction is characterized in that the handle jacket is provided with a bridge, which bridge has a damping effect. The two free ends of the circular frame are in this case directly connected with tape, and the bridge with damping properties primarily serves to secure the grip envelope. It seems that it is not possible to easily exert an appropriate effect on the cushioning properties with a tennis racket of this type of structure. This is because the bridges must be spaced at a distance that is consistent with the strength properties of the grip envelope. In particular, the reinforcing ribs on the grip outer cover are a problem.

Damping properties - A known method for exerting a suitable effect is to insert a vibrating body into the grip part, the axis of which is parallel to the longitudinal axis of the grip part. For example, DE-A
This type of structure, as can be seen from s 2338534, is intended to interfere with the vibrations caused by hitting the ball by allowing the vibrating body to vibrate freely, and is intended to be damped in this way. . In the case of a freely vibrating shock absorber, handling is very cumbersome;
The shock absorber must not be moved directly by the circular frame. The reason is that otherwise the buffer would not be able to function as a freely vibrating resonator. The object of the present invention is to devise a tennis racket which has the simple structure mentioned in the introduction and whose damping characteristics can be adjusted over a wide range. In particular, we would like to greatly simplify the assembly of the grip part. The basis of the present invention for solving this problem is that the buffer element, which supports the inner gap of the circular frame in a prescribed manner by the circular frame part, is adjustable in the longitudinal direction of the circular frame and can be adjusted at a selected position. The reason is that it can be fixed to Since the buffer element must be supported by the circular frame part as specified between the inner gaps of the circular frame, a buffer element with appropriate strength and cushioning characteristics is
It is moved to the appropriate position by being shifted between the circular rod frames and is furthermore firmly secured by adhesion to the grip jacket, by the intervention of a spacer with a slight cushioning property of the handle part in the grip jacket, or by adhesive. Fixed. In this way, the desired position of the buffer element is easily fixed, and immediately after finishing the grip part, a grip part that matches the vibration characteristics of the racket can be obtained. It is possible to use different damping elements in different quantities and also damping elements made of different materials, in which case different damping elements of this type can be arranged in the longitudinal direction of the grip part or in the circular frame of the grip part. It is possible to arrange them one after the other in the vertical direction. In this way, the damping properties can be adjusted over a wide range.

A better construction according to an embodiment of the tennis racket according to the invention is to arrange a plurality of damping elements one after the other in the longitudinal direction of the circular frame in the blip section, in which case it is natural that the damping elements are made of different materials. can be arranged in sequence in the axial direction. In the case of a structure in which at least two damping elements are arranged in at least one cross-section of the grip part and are inserted between the circular frames and mutually support the inner gaps of the circular frames, It is clear that assembly is very simple.

In addition to the damping core structure, it is also possible, for example, to use porous or foam-structured elements together as damping elements. This is because the buffer element in this portion can be appropriately supported by attaching the grip later. By setting the various damping elements in appropriate positions, it is possible to determine the exact damping characteristics even during manufacturing. In the case of a tennis racket with this type of structure, not only the cushioning properties mentioned earlier, but also the individual
They say they will take into account the special needs of the C players at a later date.

A very simple construction is to completely fill the inner cross-section between the inner members in the grip part, in which case a recess is provided to reduce the weight. In the case of this type of structure, a gripping tape is wrapped around both free ends and a single unit consisting of a shock absorbing element or a plurality of shock absorbing elements to create a grip.
In that case, only the stop plate needs to be installed. It is also possible for the damping element to be joined to the grip envelope, in which case it can be attached to both free ends of the bent circle, since such a grip envelope can be of unitary construction. is pushed up from below. It is likewise possible to use half-shells, in which case they are attached from the sides to the grip end, and by combining both sides, a complete jacket and cushioning fixing of the grip end is achieved. The outer covering, which is divided into two halves, is further divided into two halves.
Its position is maintained by wrapping the outside with gripping tape, or by gluing or combining the halves of the envelope tightly together while simultaneously snugly wrapping the damping element. The connection is maintained by In the case of such constructions, it is especially important if the damping element is made in one piece with the grip envelope, in which case it is possible to use two halves forming one complete grip. , the damping element supporting the inner cross-section between its ends is made up of a damping element half having one half-shell and a damping element half having the other half-sheathing joined together. Such half-shells are provided with damping elements arranged at predetermined positions, in which case different half-shells can be used to obtain different damping properties. In a particularly simple construction, one of the two half-shells is replaced by a damping element made of a different material to the damping element of the other half-shell, and when the two are combined, one of the two half-shells is It is conceivable that the damping elements are snugly interlocked so that the two half-shells are also snugly interlocked with each other.

In FIG. 1, the racket is designated by the symbol 1. The circular members forming the frame are bent outwards in 2 parts and with their free ends 3 form grips. The bent portion 2 is provided with a central portion 4. The gut wire stretched on the frame is 5
It is indicated by the symbol. A damping element 6 is arranged between the two free ends of the frame. The grip is tightly fitted by a stop part 7, to which a grip tape (not shown) is also wrapped.

In the structure shown in FIG. 2, a damping element 8 is arranged between both free ends 3 of the same material, and the damping element 8 is arranged between the free ends 3 of the material, as will become clear from FIG. It is buried throughout the cross section. On the other hand, in the case of FIG. 4, the buffer elements 9 are arranged separately in the longitudinal direction of the grip.
Moreover, as a result of the advantageously sliding construction, it is possible to move the damping element in the longitudinal direction of the grip and to fix it in a selected position. It is also possible to arrange a number of buffer elements in parallel in the longitudinal direction (arrow 11) of the same material 3. Since the opposing parts of this damping element are separated by a common center line 10, as becomes clear from FIG. , it is also possible to place it at a slightly shifted position in the vertical direction of the grip.

In the case of FIGS. 6 and 7, the damping element 12 supports the entire width a between the opposite ends 3 forming the grip, but does not completely fill its cross section. A structure of this type requires that a grip tape be wrapped in order to achieve a complete grip, as is also clear from the corresponding FIG. Become.

In order to reduce the weight, create a recess 1 in the horizontal direction for the same material 3.
6, which is shown in dotted lines in FIG.

A special jacket construction is shown in FIGS. 8 and 9, where a half jacket 13 is used. This special jacket structure is mounted from the outside along both free ends 3, for example in the structure according to FIGS. 2 and 3.

A variation of this type of half-sheath 13 is shown in FIG. Here, the damping element 14 is joined to a half-sheath of this kind, so that assembly is simple.

In the case of the construction according to FIG. 11, the damping element
5, and each time tightly wraps both end portions 3 of the same material forming the grip.

[Brief explanation of the drawing]

FIG. 1 is a plan view of one embodiment of the present invention detailing a tennis racquet with the grip tape removed. Second
The figure is an enlarged plan view showing variations of the grip when the grip tape is removed. FIG. 3 is a cross-sectional view of FIG. 2 taken along the line mm. FIG. 4 is a plan view showing the structure of another embodiment similar to FIG. 2. FIG. 5 is a cross-sectional view of FIG. 4 taken along the line V-V. FIG. 6 is a plan view showing the structure of another embodiment corresponding to FIG. 2. FIG. 7 is a cross-sectional view when FIG. 6 is cut along the cotton line (■-■). FIG. 8 is a plan view showing the structure of the grip outer cover. FIG. 9 is a cross-sectional view of FIG. 8 taken along the line IX-[X. FIG. 10 is a cross-sectional view showing another embodiment of the grip jacket. FIG. 11 is a cross-sectional view of the grip envelope with complete damping element. DESCRIPTION OF SYMBOLS 1... Racket, 2... Free end, 6... Buffer element, 7... Stop portion, 8... Buffer element. 9...Buffer element, 12...Buffer element, 13...Half jacket, 14...Buffer element, 15...Half jacket. Figure 1 Figure 2 Figure 4 Figure 6 Figure 8 Figure 9 @ Figure 10 Figure 11 (

Claims (7)

[Claims] (1) having a frame formed from a circular piece (3), the free ends of said circular piece being treated or bent to form a grip; between both free ends of the tennis racket, which is fixed with at least one cushioning element disposed in the grip part, and the inner gap of the circular frame (3) is fixed as specified by the circular frame (3). The buffer elements (6, 8, 9
, 12, 14, 15) are adjustable in the longitudinal direction (11) of the circular frame (3) and can be fixed at the selected position. (2) Claim (1) characterized in that a plurality of buffer elements (6, 9) are arranged side by side in the longitudinal direction (11) of the grip portion of the circular frame (3). tennis racket. (3) At least two buffer elements (9) are arranged in at least one cross section of the grip portion, and the buffer elements are inserted between the circular frames and are arranged in the circular frame. A tennis racket according to claim 1 or 2, characterized in that the inner edges of the wooden frame (3) support each other. (4) the buffer element (8, 1) in the selected position;
4) according to any one of claims 1), 2) or 3), characterized in that the handle is tightly covered by a grip jacket (13). tennis racket. (5) The buffer element (12) corresponds to the inner cross section between the circular members (3) of the grip portion, and is oriented transversely to the circular members (3) in order to reduce weight. recess (
16) The tennis racket according to any one of claims (1) to (4). (6) The above-mentioned buffer elements (8, 14) are arranged so that the grip outer cover (1)
3) The tennis racket according to any one of claims (1) to (5). (7) According to any one of claims (1) to (6), characterized in that the buffer element (15) is made integrally with the grip outer cover. The listed tennis racket.