JPH01158977A - Rebound apparatus and rebound damper used therein - Google Patents

Abstract

PURPOSE: To simulate real returning of a tennis ball by setting up a rebound damper on the surface of rebound to change the direction and velocity of a rebound ball. CONSTITUTION: This tennis training support apparatus has a rebound surface with a mesh of net 12 and many rebound dampers 26 in order to return the hitting ball to the user. The rebound damper 26 has a head part 27 and a fixed part 28 joining with a nose cone 29. The head 27 has an irregular surface 30 in a shape of projection 31. The projection 31 extends to the top 32, the section of each projection 31 reduces radially from the center of the head 27. Optimally, each projection 31 has generally plane side surface 33 inclined at about 50-70 deg., optimum at 60 deg.. Between the head 27 and the fixed part 28, a ring concave 34 is formed, which makes a preferable optional pattern on the mesh of net 12.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a sports aid with a rebound seat for a ball, and in particular, but not exclusively, to a tennis practice aid.

[Conventional technology]

There are commercially available tennis practice aids that include rebound surfaces in the form of flexible sheet materials or rigid surfaces. However, a rebound surface in the form of a non-flat surface is
It is disclosed in US Application No. 033224, filed in April 1987.

Typical rebound surfaces are described in British Patent No. 18900 and German Patent No. 2248933 as well as US Pat.
No. 55, No. 3180643, and No. 2333098. The devices disclosed in these publications all have a -like rebounding surface, so that it is possible to predict how the ball will rebound. Although in some instances the rebound surface is divided into sub-surfaces, the sub-surfaces are also generally -like so that the manner in which the ball returns can also be predicted.

[Problem to be solved by the invention]

The above-disclosed rebound surfaces made of woven mesh (i.e., sheet material) or with a hard surface make the return of the ball substantially predictable and thus allow an opponent to change the shape of the shot play. The disadvantage is that it cannot simulate the actual tennis return attempted.

The object of the invention is to overcome and substantially improve the above-mentioned disadvantages.

[Means to solve the problem]

A rebounding device for a ball game is disclosed herein, the rebounding device comprising: a frame placed on a support surface; a rebounding surface supported by the frame and onto which the ball is hit so as to return the ball to the user; and wherein the rebound surface is defined by a generally flat sheet of material that is deformed by ball impact, and further has rebound variation means secured to the rebound surface, which provides a adapted to influence the direction and/or velocity of a rebound ball impacting against the rebound surface at or near the rebound changing means compared to impact of the ball against the rebound surface at a remote location; .

Further disclosed herein is a rebound damper secured to a flexible rebound seat of the rebound device;
The seat has a front rebound surface and a rear surface against which the ball impinges as it is returned by a rebound device, the damper having a head that contacts the rebound surface so as to protrude from the rebound surface, and a head that contacts the rear surface. a fixed portion; a neck portion connecting the head and the fixed portion and adapted to pass through the rebound seat; with an irregular surface facing the outside to ensure

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2, a tennis practice aid 10 is shown schematically placed on a ground surface.

The tennis practice aid IO consists of a frame 11 supporting a sheet of woven mesh 12 on which a tennis ball is hit and with a rebound surface 15 for returning the tennis ball to the user. When the tennis ball collides with the mesh 12, the mesh 2 is thereby deformed and shifted.

The frame 11 includes a rectangular sub-frame 13 that directly supports the mesh 12. Frame 11 further includes a pair of upright frame members 14 that directly support secondary frame 13 and to which net base IB is attached. Rectangular subframe 1
3 is a horizontal frame member 17 and a vertical frame member 1
Contains 8. The frame member 14 is a vertical frame member 1
8 in close proximity to their upper and lower parts.

The net base 1B includes a frame 19 which includes two triangular lateral sub-frames 20 within the membrane, each sub-frame 20 having a wheel 21. The cross member 22 extends not only between the pair of tension members 23 but also between the two sub-frames 20.

Extending between the secondary frames 19 and 20 is a net 24 having an end positioned above it so as to approximate the upper end of a regular tennis net.

The frame member 14 is telescopically inserted into the tubular portions 25 of the sub-frames 19 and 20. Therefore, the frame 11 can be moved from the net base 1B and the net base 16 can be used independently as a net on each side by the player. This shape is shown in FIG.

A plurality of rebound dampers 26 are attached to the mesh 12, which will be described in detail with reference to FIGS. 3-9.

The rebound damper 26 has a head 27 and a fixed part 28 joined by a neck part 29. The head 27 has mesh 1
It has an irregular surface 30 in the form of protrusions 31 extending away from 2. In this particular embodiment, protrusion 31 is a ridge radiating from the center of head 27. Protrusion 3
1 has a tip 32 extending in the length direction, and the cross section of each protrusion 31 is reduced radially from the center of the head 27. Preferably, each protrusion 31 has a generally flat lateral surface 33 angled by an angle of about 50-70'', but preferably by an angle of 60°. This particular embodiment , there are five protrusions 31.

Between the head 27 and the fixing part 28 an annular quadrature 34 is defined, in which the strands 35 of the mesh 12 are located so that the rebound damper 26 is fixed in place. Preferably, rebound damper 26 is made of plastic material or natural or synthetic rubber.

Rebound dampers 26 are arranged on mesh 12 in any desired pattern.

In using the tennis practice aid 10 described above, the user cannot anticipate all the returns of the ball when directing the ball through the mesh 12. This is because a ball that hits one of the rebound dampers 26 or near it will not behave in the way that the child is capable of. For example, if the ball hits one of the rebound dampers 26 directly, the ball will
Compared to if the ball were to hit the mesh at a distance from the rebound damper 26, it would fall and/or change direction much more quickly.

Damper 36 as a replacement for rebound damper 26
(Figure 10B) is used. Damper 36 has a front surface 37 and a central hole 38.

An alternative rebound modification device is shown in FIGS. 10A, BSC%ESF, and G. These have varying properties and are placed on the surface 15 to provide the required return pattern.

In Figure 10, the modified device has increased knitting density in predetermined areas.

〔Effect of the invention〕

As described above, according to the present invention, since the rebound changing means (rebound damper) is provided on the rebound surface, the direction and/or speed of the rebound ball can be changed. Therefore, there is an effect that an actual tennis return can be simulated.

[Brief explanation of the drawing]

Figure 1 is a schematic perspective view of the tennis practice aid, Figure 2 is a schematic perspective view of the net base of the tennis practice aid shown in Figure 1, and Figure 3 is used in the tennis practice aid shown in Figure 1. FIG. 4 is a schematic rear perspective view of the rebound damper shown in FIG. 3, FIG. 5 is a schematic front front view of the rebound damper shown in FIG. 3, and FIG. 6 is a schematic front perspective view of the rebound damper shown in FIG. Schematic rear front view of rebound damper, No. 7
The figure is a schematic side front view of the rebound damper of FIG. 3, FIG. 8 is a schematic sectional side front view of the rebound damper of FIG. 5 taken along line 8-8, and FIG. a schematic side elevational view of a section taken along line 9-9 of the rebound damper;
FIG. 1O is a diagram schematically illustrating various rebound dampers that may be used in combination with or in place of the rebound dampers of FIGS. 3-9. IO...Auxiliary equipment for tennis practice (rebound device),
DESCRIPTION OF SYMBOLS 11...Frame, 12...Mesh, 13...Subframe, 14...Frame member, 15...Rebound surface, 16...Net base, 17...Horizontal frame member , 18... vertical frame member, 19.
... Frame, 20... Lateral secondary frame, 21...
Wheel, 22...Cross member, 23...Tension member, 24
... Net, 25 ... Tubular part, 26 ... Rebound damper, 27 ... Head, 28 ... Fixed part, 29
... Neck, 30 ... Irregular surface, 31 ... Protrusion, 32 ... Tip, 33 ... Side surface, 34 ... Annular four parts, 35 ... Stranded wire, 36 ...damper, 3
7... Front surface, 38... Center hole.輻ζ Procedural amendment (method) December 28, 1988

Claims (1)

[Claims] 1. A rebound device (10) for a ball game, the rebound device comprising a frame (11) placed on a support surface and supported by the frame (11) when the ball is used. a rebound surface (15) that is hit back to the player, said rebound surface (15) being defined by a generally flat sheet material that is deformed by the impact of the ball; 15) has rebound varying means (26) fixed to said rebound varying means (26), said rebound varying means (26) as compared to an impact of the ball against said rebounding surface (15) at a location remote from said rebound varying means (2?); A rebound device adapted to influence the direction and/or velocity of a rebound ball impacting at or near the means (26) against said rebound surface (15). 2. The rebound surface (15) has a mesh (12), and the rebound changing means (26) has a mesh (12).
Multiple rebound dampers (26) fixed to 12)
The rebound device according to claim 1. 3. Each rebound damper (26) has a head (27) with which the ball collides, a fixed part (28) located on the other side of the mesh (12), and a mesh (12). 3. A rebound device according to claim 2, further comprising a neck (29) extending through the neck and joining said head (27) and said fixing part (28). 4. Each rebound damper (26) has an annular groove (34
), in which a portion of the mesh (12) is located to keep the rebound damper (26) in place. 5. The head (27) of each rebound damper (26) is
5. Rebounding device according to claim 4, characterized in that it has a ridge (30) on which the ball impinges. 6. In a rebound damper (26) fixed to a flexible rebound seat (12) of a rebound device (10) having a front rebound surface (15) and a rear surface such that the ball is returned by the rebound device, a head 27 protruding from the rebound surface (15) and in contact with the rebound surface (15); a fixing part (28) in contact with the rear surface; and the head (27) and the fixing part (28). Join and attach the above rebound sheet (1
2) with a neck (29) adapted to pass through the ball, said head (27) having an outwardly directed irregular shape which ensures changing the direction and/or speed of the rebounding ball; Rebound damper with surface (30). 7. The irregular surface (30) has protruding ridges (30)
The rebound damper according to claim 6. 8. A rebound damper according to claim 7, wherein said ridge (30) extends from a central portion of said head (27) and radiates out. 9. A rebound damper according to claim 8, wherein each ridge (30) has a triangular cross section whose area decreases from said central portion.