KR101915270B1 - Golf ball for putting practice - Google Patents

Abstract

The present invention relates to a golf ball having a first concave portion and a second concave portion which are spaced from each other at a predetermined distance from the center of the golf ball and are formed so as to be parallel to each other along the circumferential direction of the surface of the golf ball with a predetermined depth and width, And the first and second ring portions inserted into the second concave portion, the golf ball is rolled only in a predetermined direction at the time of putting, and the trajectory of the putting golf ball is confirmed, A golf ball for putting practice which improves the reliability of a golf ball by accurately maintaining the center of gravity of the surface and core during injection molding, improves the stability of the golf ball for putting practice, and reduces the manufacturing cost of the golf ball for putting practice will be.

Description

Golf ball for putting practice [0002]

[0001] The present invention relates to a golf ball for putting practice, and more particularly to a golf ball for putting practice, and more particularly to a golf ball for putting practice, The golf ball is rolled in a predetermined direction at the time of putting by the first ring portion and the second ring portion which are inserted into the concave portion, the second concave portion, the first concave portion and the second concave portion, and the trajectory of the golf ball to be put is checked The present invention relates to a golf ball for putting practice in which the efficiency of putting practice is improved and the reliability and stability of the golf ball can be improved by accurately maintaining the center of gravity of the surface and core at the time of injection molding of the golf ball.

In general, a golf ball is composed of an inner core capable of elastic deformation and a surface having an outer surface wrapping the outer surface of the inner core.

A dimple is formed on the surface to increase the distance by reducing the resistance of the air. In addition, a paint coating layer may be formed on the surface to facilitate identification of the golf ball. Conventional golf balls for putting practice and golf balls for general field are formed to have an average of 45.4 grams.

In general, practicing to reduce the number of golf balls, whether professional golfers or amateur golfers, is one of the most effective ways of putting practice.

However, the conventional putting practice apparatus requires a lot of space. There is a problem that the utilization is reduced in the place where the space is short and the price is relatively expensive.

A variety of putting practice golf balls have been developed.

However, as shown in FIG. 1, the conventional golf ball 1 for putting practice has a problem in that a large number of golf balls 1 are formed on the surface 2 like the ordinary golf ball, and only the trajectory of the golf ball is displayed at the time of putting.

In other words, since the conventional golf ball for putting practice is formed as a perfect sphere, rotation is applied to the golf ball according to the position where the golf ball is struck at the time of putting, and thus the trajectory for moving the golf ball is different each time, there was.

In addition, the conventional golf ball for putting practice has a problem in that the golf ball can not maintain the center of gravity of the golf ball accurately, despite its attempt to give a certain direction at the time of putting.

In addition, the conventional golf ball for putting practice has a problem in that the stability of the golf ball is reduced due to the manufacturing for uniformity during putting, and the stability of the golf ball is reduced due to frequent putting.

Korean Patent Registration No. 10-1321870

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a golf ball which is spaced at a predetermined distance from the center of the golf ball, The golf ball having a first concave portion and a second concave portion and a first ring portion and a second ring portion which are inserted into the first concave portion and the second concave portion, By checking the trajectory, it is possible to improve the efficiency of the putting practice, improve the reliability of the golf ball by maintaining the center of gravity of the surface and the core accurately during injection molding of the golf ball, improve the stability of the golf ball for putting practice, And to provide a golf ball for putting practice that can reduce manufacturing cost of the golf ball.

In order to achieve the object of the present invention, the golf ball for putting practice according to the present invention is a golf ball for putting practice in which a plurality of dimples are formed on a surface thereof. The ball is spaced apart from the center of the golf ball by a predetermined distance, A first concave portion formed to be embedded along the circumferential direction; And a second concave portion spaced apart from the center of the golf ball so as to be parallel to the first concave portion and formed to be inclined along the circumferential direction of the surface with a predetermined depth and width.

In another preferred embodiment of the golf ball for putting practice according to the present invention, the putting practice golf ball passes through the center of the golf ball and is parallel to the first and second concave portions and in the circumferential direction of the surface And a third concave portion formed to be smaller than a depth of the first concave portion and the second concave portion.

In another preferred embodiment of the golf ball for putting practice according to the present invention, the golf ball for putting practice comprises: a first ring portion to be inserted into the first concave portion; And a second ring portion inserted into the second concave portion.

In another preferred embodiment of the golf ball for putting practice according to the present invention, the first ring portion and the second ring portion of the golf ball for putting practice may be formed of a metal member or an elastic member.

In another preferred embodiment of the golf ball for putting practice according to the present invention, the golf ball for putting practice is formed so that the diameter of the golf ball is 42.5 mm, and the first concave portion is formed at a distance of 11.5 mm from the center, And the second concave portion may be formed along the circumferential direction of the surface at a distance of 11.5 mm from the center in the direction opposite to the first concave portion.

In another preferred embodiment of the putting practice golf ball according to the present invention, the first concave portion of the golf ball for putting practice is formed to have a width of 2 mm and a height of 2 mm, and the second concave portion has a width of 2 mm and a width of 2 mm May be formed to have a height.

Further, in another preferred embodiment of the golf ball for putting practice according to the present invention, in the state where the first ring portion and the second ring portion of the golf ball for putting practice are inserted into the first concave portion and the second concave portion, The first ring portion may be formed to have a width of 2 mm and a length of 31 mm so as not to protrude from the surface of the golf ball, and the second ring portion may be formed to have a width of 2 mm and a length of 31 mm.

The golf ball for putting practice according to the present invention includes a first concave portion and a second concave portion which are spaced apart at a predetermined distance from the center of the golf ball and are formed so as to be parallel to each other along the circumferential direction of the surface of the golf ball with a predetermined depth and width, And a first ring portion and a second ring portion that are inserted into the first concave portion and the second concave portion, the golf ball is rolled only in a predetermined direction at the time of putting, and the trajectory of the golf ball to be put is confirmed, thereby maximizing the efficiency of putting practice There is an effect that can be done.

In addition, since the golf ball for putting practice according to the present invention is formed by inserting the first and second ring portions into the first and second concave portions, the center of gravity of the surface and the core is precisely maintained at the time of injection molding of the golf ball, It is possible to improve the reliability of the golf ball by allowing the golf ball to move in a certain direction at the time of putting while maintaining the reliability of the golf ball.

Further, the golf ball for putting practice according to the present invention improves the stability of the golf ball for putting practice as the first and second ring portions are not protruded to the outside of the first and second concave portions and coincide with the outer circumferential surface of the golf ball, It is possible to reduce the manufacturing cost of the golf ball and minimize the damage of the golf ball even in frequent putting practice, thereby reducing the repacking cost of the golf ball for putting practice.

1 shows a perspective view of a conventional golf ball for putting practice.
2 shows a perspective view of a golf ball for putting practice according to an embodiment of the present invention.
FIG. 3 is a perspective view of a golf ball for putting practice according to an embodiment of the present invention, in which the first and second rings are fastened.
Fig. 4 shows a cross-sectional view along the AA direction in Fig. 2. Fig.
Fig. 5 shows a front view of the golf ball for putting practice shown in Fig. 3;
6 is a plan view of a golf ball for putting practice according to another embodiment of the present invention.
7 shows a cross-sectional view of the first and second ring portions of a golf ball for putting practice according to an embodiment of the present invention.
8 is a plan view of a golf ball for putting practice according to an embodiment of the present invention in which a V-shaped pattern is formed on a surface thereof.
FIG. 9 is a plan view of a golf ball for putting practice according to an embodiment of the present invention in which a W pattern is formed on the surface of the golf ball.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings of a prefabricated pillow. The following embodiments are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the embodiments described below, but may be embodied in other forms. In the drawings, the size and thickness of an apparatus may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. However, it should be understood that the present invention is not limited to the embodiments disclosed herein but may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification. The dimensions and relative sizes of the layers and regions in the figures may be exaggerated for clarity of illustration.

The terminology used herein is for the purpose of describing embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. &Quot; comprise "and / or" comprising ", as used in the specification, means that the presence of stated elements, Or additions.

FIG. 2 is a perspective view of a golf ball for putting practice according to an embodiment of the present invention, and FIG. 3 is a perspective view of a golf ball for putting practice according to an embodiment of the present invention in which first and second rings are fastened. Fig. 4 is a sectional view taken along the direction A-A in Fig. 2, and Fig. 5 is a front view of the golf ball for putting practice shown in Fig. 6 is a plan view of a golf ball for putting practice according to another embodiment of the present invention. FIG. 7 is a sectional view of first and second ring portions of a golf ball for putting practice according to an embodiment of the present invention. FIG. 8 is a view showing a state in which a V-shaped patterned portion is formed on the surface of a golf ball for putting practice according to an embodiment of the present invention And FIG. 9 is a plan view of a golf ball for putting practice according to an embodiment of the present invention in which a W-shaped pattern is formed on the surface.

2 to 5, a golf ball 1 for putting practice according to an embodiment of the present invention will be described. 2 to 5, a golf ball 1 for putting practice according to a preferred embodiment of the present invention includes a first concave portion 10 and a second concave portion 20.

In the golf ball 1 for putting practice according to the preferred embodiment of the present invention, a plurality of dimples 3 are formed on the surface 2 is the same as that of a conventional golf ball or a putting practice golf ball, The difference between golf balls is emphasized.

The first recesses 10 are spaced a predetermined distance from the center C of the golf ball and are recessed along the circumferential direction of the surface 2 with a predetermined depth H1 and a width D1.

The second concave portion 20 is spaced a predetermined distance from the center C of the golf ball so as to be parallel to and facing the first concave portion 10 and has a predetermined depth H2 and a width D2, Are formed along the circumferential direction.

Although not limited thereto, the golf ball 1 for putting practice according to the preferred embodiment of the present invention is formed such that the diameter R is 42.5 mm.

The first concave portion 10 of the golf ball 1 for putting practice according to a preferred embodiment of the present invention has a surface 2 < RTI ID = 0.0 > And the second concave portion 20 is formed in the circumferential direction of the surface 2 at a distance of 11.5 mm in the direction opposite to the first concave portion 10 at the center C of the golf ball .

The first concave portion 10 of the golf ball 1 for putting practice according to a preferred embodiment of the present invention is formed to have a width D1 of 2 mm and a height H1 of 2 mm, And the second concave portion 20 is formed to have a width D2 of 2 mm and a height H2 of 2 mm.

2 to 5, the golf ball 1 for putting practice according to an embodiment of the present invention further includes a third recess 30.

The third concave portion 30 is parallel to the first concave portion 10 and the second concave portion 20 while passing through the center C of the golf ball and extends along the circumferential direction of the surface 2, (H1, H2 < H3) of the second recess 10 and the second recess 20, respectively.

The center of gravity of the golf ball as a whole can be kept constant as the third concave portion 30 is formed to be smaller than the depths H1 and H2 of the first concave portion 10 and the second concave portion 20.

In the golf ball 1 for putting practice according to the preferred embodiment of the present invention, the first concave portion 10, the second concave portion 20 and the third concave portion 30 are formed The weight of the golf ball in the state is preferably 43 grams.

3 and 5, the golf ball 1 for putting practice according to an embodiment of the present invention further includes a first ring portion 40 and a second ring portion 50. As shown in Fig.

The first ring portion 40 is inserted into the first concave portion 10 and the second ring portion 50 is inserted into the second concave portion 20.

The first ring portion 40 and the second ring portion 50 may be formed of a metal member or an elastic member (rubber material). Since the first ring portion 40 and the second ring portion 50 are formed of a metal member or an elastic member, it is easy to insert the first recess 10 and the second recess 20, It is possible to reduce the repacking cost of the golf ball for putting practice because it is easy to replace them during wear.

Also, although not necessarily limited, the golf ball 1 for putting practice may be formed of a metal material or an elastic material (polyurethane, polyisoprene, polyethylene, or a mixture thereof).

As described above, the golf ball for putting practice according to the present invention includes a first concave portion spaced apart at a predetermined distance from the center of the golf ball and formed so as to be parallel to each other along the circumferential direction of the surface of the golf ball with a predetermined depth and width, The first ring portion and the second ring portion, which are inserted into the concave portion, the first concave portion and the second concave portion, allow the golf ball to roll only in a certain direction at the time of putting and check the locus of the golf ball to be put, Can be maximized.

In addition, since the golf ball for putting practice according to the present invention is formed by inserting the first and second ring portions into the first and second concave portions, the center of gravity of the surface and the core is precisely maintained at the time of injection molding of the golf ball, The reliability of the golf ball can be improved by allowing the golf ball to move in a certain direction at the time of putting.

The first ring portion 40 and the second ring portion 50 are inserted into the first concave portion 10 and the second concave portion 20 while being inserted into the first concave portion 10 and the second concave portion 20, The first ring portion 40 is formed to have a width W1 of 2 mm and a length L1 of 31 mm so that the second ring portion 50 does not protrude relative to the first ring portion 50. The second ring portion 50 has a width W2 of 2 mm and a length L2 of 31 mm .

As described above, according to the golf ball for putting practice according to the present invention, the stability of the putting practice golf ball is improved as the first and second ring portions are not protruded to the outside of the first and second concave portions, The manufacturing cost of the ball is reduced, and damage to the golf ball can be minimized even with frequent putting exercises.

The first ring portion 40 and the second ring portion 50 are each formed to have a weight of 1.2 grams so that the first ring portion 40 and the second ring portion 50 are connected to the first concave portion 10 and the second concave portion 50, The golf ball for putting practice becomes a total of 45.4 grams while being connected to the golf club 20.

In the state where the first ring portion and the second ring portion are engaged with the first concave portion and the second concave portion, the putting practice golf ball according to the present invention has the same weight as the existing putting practice golf ball and the actual golf ball, The user's satisfaction can be improved by keeping the golfer's sense in the field the same.

Referring to Fig. 6, a golf ball 1 for putting practice according to another embodiment of the present invention will be described. 6, the golf ball 1 for putting practice according to another embodiment of the present invention further includes a fourth concave portion 60, a fifth concave portion 70, and a third ring portion 80 do.

The fourth concave portion 60 is formed at a position symmetrical to the first concave portion 10 with respect to the second ring portion 50. That is, the fourth recess 60 is spaced at a predetermined distance from the center of the golf ball along the surface of the golf ball, which is additionally provided on the end surface of the second recess 20 into which the second ring 50 is inserted, And is symmetrical with the first concave portion 10 while having a depth and a width.

The third ring portion 80 is inserted into the fourth concave portion 60. The specific depth and width, and the distances that are spaced apart from the center of the golf ball, which are additionally provided, are the same as those of the above-described embodiment of the present invention.

The fifth concave portion 70 is formed at a position symmetrical to the third concave portion 30 with respect to the second ring portion 50. [ That is, the fifth recess 70 is spaced at a predetermined distance from the center of the golf ball along the surface of the golf ball further provided on the end surface of the second recess 20 into which the second ring portion 50 is inserted, And is formed symmetrically with the third concave portion 10 while having a depth and a width.

The depth of the fifth recess (70) is smaller than the depth of the fourth recess (60).

As described above, the golf ball 1 for putting practice according to another embodiment of the present invention maximizes the efficiency of the putting practice of the putting practitioner by restraining the rotation of the golf ball at the time of putting as much as possible and by forming the golf ball for putting practice to move in a certain direction can do.

7 to 9, a golf ball 1 for putting practice according to another embodiment of the present invention will be described. 7 to 9, the first ring portion 40 and the second ring portion 50 of the golf ball 1 for putting practice according to another embodiment of the present invention have grooves 41, 51 Or pattern portions 42, 42, 52, and 53, respectively.

7, the first ring portion 40 and the second ring portion 50 have grooves 41 and 51 formed on the outer circumferential surface of the first ring portion 40 and the second ring portion 50, respectively, . As described above, the friction between the ground surface and the ground during putting is maximized by the groove portions 41 and 51 of the first ring portion 40 and the second ring portion 50, thereby suppressing the occurrence of spin at the time of putting practice golf ball to the utmost As the golf ball is guided to move in a certain direction, the putter's practice of putting can be maximized.

8 and 9, the first ring portion 40 and the second ring portion 50 are continuously formed on the outer peripheral surface of the first ring portion 40 and the second ring portion 50 at regular intervals along the circumferential direction of the first ring portion 40 and the second ring portion 50, The friction between the ground and the V-shaped fringe portions 42 and 52 and the W-shaped fringe portions 43 and 53 formed by the golf ball for putting practice is maximized, As the ball is moved in a certain direction, it is possible to maximize the putter's putting practice.

<Test Example: Performance Evaluation of Golf Ball for Putting Practice>

A performance evaluation was performed to determine whether the grooves and various patterned portions were formed on the outer circumferential surfaces of the first ring portion 40 and the second ring portion 50 to move with constant direction through friction with the ground. These performance evaluations were carried out with an index of -10 to 10, with 0 as a reference. The higher the number, the better the effect of putting practice, such as a certain direction. The subjects were repeatedly tested 5 times over 30 days for each of the 20 to 60 amateur golfers having the same average number of batters. The results of these performance evaluations are shown in Table 1 below by plotting the indexes in an average.

Example 1
(Groove) Example 2
(V pattern) Example 3
(W pattern) Comparative Example directional 4 4.4 10 0 Frictional force 3.5 4 9.1 0 Wear 4.1 4 9.1 0 Repeatability 4.2 4.6 9 0

Referring to Table 1, in comparison with the comparative example (in the case of no grooves and patterned portions) according to Examples 1 to 3, the golf ball for putting practice has a direction that moves in a certain direction when putting golf ball for putting practice, The friction force according to the strength of the friction force with the ground, the abrasion according to the degree of abrasion of the first ring portion and the second ring portion during repetitive putting of the putting practice golf ball, and the repetition according to the putting repetition when putting the golf ball for putting practice It can be seen that the effect can be increased.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

1: golf ball, 2: surface,
3: dimple, 4: core,
10: first concave portion, 20: second concave portion,
30: third concave portion, 40: first ring portion,
50: second ring portion, 80: third ring portion,
41, 51: groove portions of the first and second ring portions,
42, 52: first and second ring portions V pattern portions,
43, 53: W-shaped pattern portion of the first and second ring portions,
60: fourth concave portion, 70: fifth concave portion,
C: center, R: diameter,
D1, D2, D3: width of the first recess, width of the second recess, width of the third recess,
H1, H2, H3: height of the first concave portion, height of the second concave portion, height of the third concave portion,
L1, L2: length of the first ring part, length of the second ring part,
W1, W2: width of the first ring portion, width of the second ring portion.

Claims (7)

1. A golf ball for putting practice in which a plurality of dimples are formed on a surface,
A first concave portion spaced apart from the center of the golf ball by a predetermined distance and formed to be recessed along a circumferential direction of the surface with a predetermined depth and width; And
And a second concave portion that is spaced apart from the center of the golf ball so as to be parallel to the first concave portion and formed to be embedded along the circumferential direction of the surface with a predetermined depth and width,
And a third concave portion that is formed to be smaller than a depth of the first concave portion and the second concave portion along a circumferential direction of the surface while passing through the center of the golf ball and parallel to the first concave portion and the second concave portion, ; &Lt; / RTI &gt;
A first ring portion which is inserted into the first concave portion; And
And a second ring portion inserted into the second concave portion,
Wherein a W-shaped pattern portion is continuously formed on the outer circumferential surfaces of the first ring portion and the second ring portion at regular intervals along the circumferential direction of the first ring portion and the second ring portion.
delete delete The method according to claim 1,
Wherein the first ring portion and the second ring portion are formed of a metal member or an elastic member.
5. The method of claim 4,
The golf ball having a diameter of 42.5 mm,
The first concave portion is formed along the circumferential direction of the surface at a distance of 11.5 mm from the center,
Wherein the second concave portion is formed along the circumferential direction of the surface at a distance of 11.5 mm in the direction opposite to the first concave portion at the center.
6. The method of claim 5,
The first concave portion is formed to have a width of 2 mm and a height of 2 mm,
Wherein the second concave portion is formed to have a width of 2 mm and a height of 2 mm.
The method according to claim 6,
The first ring portion has a width of 2 mm and a length of 31 mm so as not to protrude from the surface of the golf ball in a state where the first ring portion and the second ring portion are inserted into the first concave portion and the second concave portion And the second ring portion is formed to have a width of 2 mm and a length of 31 mm.

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