Golf putting practice device

Abstract

This golf putting practice device helps players acquire the correct form and stabilize the direction of the ball's launch. [Solution] A golf putting practice device comprising two opposing flat plates, wherein (A) one flat plate 1 is held in the air by a support part 10, the support part has a structure that allows the angle of the flat plate with respect to the horizontal direction to be changed and fixed between 65 and 80 degrees, and (B) the other flat plate 2 is attached to the putter shaft 31 by a mounting device, the mounting device has a structure that allows the flat plate to be attached in such a way that only the side surface of the flat plate is visible when viewed from a direction perpendicular to the putter face, and the angle of a straight line L extending from one side of the flat plate to the center of the putter head with respect to the shaft to be parallel or greater than 0 degrees and less than or equal to 15 degrees.

Description

【Technical Field】 【0001】 The present invention relates to a golf putting practice device, and more particularly to a golf putting practice device that enables the hitting direction of the ball to be stabilized in putting by making the putting form accurate. 【Background Art】 【0002】 Conventionally, as a putting practice device for stabilizing the hitting direction of the ball in golf putting, for example, a device having a structure as shown in FIG. 7 is known (Patent Document 1). In this device, two rod-shaped bodies (110, 111) horizontally held in the air are installed between a player (hitter) and the shaft (310) of a putter (300) held by the player, and the shaft (310) of the putter (300) is brought into contact with the two rod-shaped bodies at a constant angle with respect to the horizontal direction to repeat the putting practice. This device attempts to stabilize the movement of the putter head (320) to acquire an accurate putting form and stabilize the hitting direction of the ball in putting. However, although this device can be manufactured simply and at low cost, since the putter shaft (310) and the two rod-shaped bodies (110, 111) are substantially point contacts, there is a drawback that the sole is not sufficiently stable with respect to the ground (green surface). 【0003】 In order to solve this drawback, for example, a device having a structure as shown in FIG. 8, called a putting board, has been developed. According to this device, since it is possible to repeat the putting practice while bringing the flat plate (210) attached to the player side of the shaft (310) of the putter (300) held by the player into contact with another flat plate (211) installed between the player and the flat plate (210) attached to the shaft (3) at a predetermined angle, the stability of the sole with respect to the ground (green surface) is increased, and the putting form can be made more stable. 【0004】 However, in all of the above methods, during putting practice, the putter shaft (310) or a flat plate (210) attached to the putter shaft is repeatedly brought into contact with two parallel rod-shaped bodies (110, 111) held horizontally in the air, or a flat plate (211) at a predetermined angle installed on a base, with the player (hitter) facing forward. As a result, the putter (300) is supported by the aforementioned rod-shaped bodies (110, 111) or flat plate (211), which inevitably reduces the gripping force on the putter compared to the actual feel. Therefore, even if one feels they have mastered the putting form through practice using these devices, stabilizing the ball's launch direction on the actual green remains difficult due to the difference in the perceived gripping force on the putter. 【0005】 Furthermore, a putting practice device has been disclosed (Patent Document 2) characterized in that a swing arm is attached to a stand mounted on a base frame and a stand attached to the base frame, with the swing arm being able to rotate freely in both forward and reverse directions by means of a bearing, pivot pin, and bearing with the upper end as the pivot point, and a bracket is attached to the swing arm, and at least a support member and a retaining member are equipped to clamp the shaft of the putter. The problem to be solved by this invention is to provide a golf putting practice device in which the plane Y axis and the putting surface of the putter are always kept at a right angle, a series of movements are performed smoothly, and putting becomes stable with a good sense of distance. With this practice device, the putter is attached to the practice device and fixed in place for putting practice. However, in reality, putting is not done with such a practice device on the green, and there is a significant difference in feel between putting with the practice device and putting with the actual putting, making it difficult to reproduce the putting acquired through practice. In addition, this practice device also has the disadvantage of being expensive. [Prior art documents] [Patent Documents] 【0006】 [Patent Document 1] Special Publication No. 4-501081 [Patent Document 2] Japanese Patent Application Publication No. 10-248985 [Overview of the Initiative] [Problems that the invention aims to solve] 【0007】 This invention provides a golf putting practice device that is easy to use and inexpensive, enabling each player to easily and quickly find a swing surface that suits them, and to repeatedly practice putting with that swing surface, thereby allowing each player to acquire an accurate putting form and stabilize the direction of the ball's launch in putting. [Means for solving the problem] 【0008】 Generally, when putting, it is important to address the ball with the center of the putter head (face) aligned straight with the target line (centerline of the golf ball), with almost the entire sole in contact with the ground (green surface), or with the sole slightly off the ground and nearly parallel to the ground, and then swing the putter in a consistent arc so that the center of the putter head strikes the centerline of the golf ball at almost a right angle. In order to further improve putting, it is said that, in order for the center of the putter head to strike the center of the golf ball at approximately a right angle, the putting swing plane, that is, the plane including the arc formed by the center of the putter head with the center of the putter head as the axis of rotation, should not be a plane including the arc formed by the center of the putter head with the point where the extension of the shaft touches the body as the center of rotation, but rather a plane including the arc formed by the center of the putter head with the point where the extension of the shaft touches the body as the center of rotation, for example, around the solar plexus, with the center of rotation, and the line connecting that point and the center of the putter head as the axis.Therefore, when practicing putting, it is important for each player to find a swing plane that suits them, and then repeatedly practice putting so that the putter head draws an arc along that swing plane, so that they can always feel their own swing plane and reproduce it on the green. 【0009】 In the putting practice devices shown in Figures 7 (Patent Document 1) and 8 above, the putter shaft or a flat plate attached to the putter shaft is laid down towards the player, and repeated practice is performed by bringing it into contact with two parallel rod-shaped bodies or a flat plate with a predetermined angle that is held horizontally in the air or installed on a base. Therefore, it is possible to repeatedly practice by adjusting the angle of these putting practice devices to roughly match the lie angle of the putter. However, it is impossible to practice by realizing the swing surface on the device using these putting practice devices. For example, if a player using a putter with a lie angle of 70 degrees tries to achieve a 75-degree incline for the swing surface using these putting practice devices, the heel of the putter will lift significantly, resulting in a swing that is completely different from the player's natural putting swing. Therefore, with these putting practice devices, it is not possible for the player to find and realize a swing surface that is suitable for them, and thus the player cannot practice while actually feeling the swing surface that is suitable for them. Therefore, regarding the swing plane mentioned above, players are forced to practice while mentally imagining and being aware of their own swing plane. Consequently, the swing plane often ends up being the arc formed by the shaft and its extension, making it difficult to further improve putting. 【0010】 The putting practice device described in Patent Document 2 allows players to practice putting while keeping the putting surface of the putter perpendicular to the plane's Y-axis. While it may be possible to adjust the swing surface using this device, it is considered difficult to clamp the putter shaft to the device, find a swing surface that suits each player, and then adjust the angle of the putter shaft accordingly. In addition, as already mentioned, this device fixes the putter to the device for putting practice, which is a significant difference from the feel of actual putting. Furthermore, each player's actual swing has subtle characteristics at the beginning and end, and each player's actual swing does not necessarily draw a perfect arc. Therefore, fixing the putter to the device severely restricts its movement, and thus, repeatedly practicing with a device that fixes the putter to the device in this way may actually disrupt each player's putting form. Moreover, this device is expensive. 【0011】 The inventors diligently investigated what kind of device would be suitable so that each player could easily and quickly find a swing surface that suits them, accurately and repeatedly practice putting on that swing surface, and be easy to handle and inexpensive. As a result, they found that the following specified golf putting practice device can solve the above problems, and thus completed the present invention. 【0012】 In other words, the present invention is (1) A golf putting practice device comprising two separate flat plates (1,2), (A) One flat plate (1) held in the air by a support (10), wherein the support (10) has a structure that can change and / or fix the angle (θ) of the plane (3) of the one flat plate (1) opposite to the connection (16) with the support (10) with respect to the horizontal direction (Hd), and (B) The other flat plate (2) is attached to the shaft (31) of the putter (30) by a mounting fixture (20), wherein the other flat plate (2) is attached to the toe (Pt) side of the putter head (32) relative to the shaft (31), and when the other flat plate (2) is viewed from a direction substantially perpendicular to the face (33) of the putter head (32), only substantially the side (6) of the other flat plate (2) is visible. The mounting fixture (20) is provided with such a structure that, when the other flat plate (2) is viewed from a direction substantially perpendicular to the face (33) of the putter head (32), the angle (θ') of the straight line (L) formed by extending the side (5) of the side surface (6) of the other flat plate (2) opposite to the shaft (31) passes through the center (Pc) of the putter head (32) can be changed and / or fixed. This is a golf putting practice device equipped with [features / equipment]. 【0013】 In a preferred embodiment, (2) The golf putting practice device according to (1) above, wherein the plane (4) of the other flat plate (2) opposite to the shaft (31) is capable of contacting the plane (3) of the one flat plate (1) opposite to the joint (16) with the support (10), (3) The golf putting practice device according to (1) or (2) above, wherein the support portion (10) has a structure that allows the angle (θ) of the plane (3) of the one flat plate (1) opposite to the joint portion (16) with the support portion (10) to be changed and / or fixed in the range of 65 to 80 degrees with respect to the horizontal direction (Hd), (4) The golf putting practice device according to (1) or (2) above, wherein the support portion (10) has a structure that allows the angle (θ) of the plane (3) of the one flat plate (1) opposite to the joint portion (16) with the support portion (10) to be changed and / or fixed within a range of 68 to 80 degrees with respect to the horizontal direction (Hd), (5) The golf putting practice device according to (1) or (2) above, wherein the support portion (10) has a structure that allows the angle (θ) of the plane (3) of the one flat plate (1) opposite to the joint portion (16) with the support portion (10) to be changed and / or fixed within a range of 70 to 80 degrees with respect to the horizontal direction (Hd), (6) The golf putting practice device according to (1) or (2) above, wherein the support portion (10) has a structure that allows the angle (θ) of the plane (3) of the one flat plate (1) opposite to the joint portion (16) with the support portion (10) to be changed and / or fixed within a range of 70 to 78 degrees with respect to the horizontal direction (Hd), (7) The mounting fixture (20) has a structure that allows the angle (θ') of the straight line (L) with respect to the shaft (31) to be changed and / or fixed in the range of 0 to 15 degrees, such that when the other flat plate (2) is viewed from a direction substantially perpendicular to the face (33) of the putter head (32), the straight line (L) formed by extending the side (5) of the side surface (6) of the other flat plate (2) opposite to the shaft (31) passes through the center (Pc) of the putter head (32), the golf putting practice device according to any one of (1) to (6) above. (8) A golf putting practice device according to any one of (1) to (7) above, wherein the area of ​​the plane (4) of the other flat plate (2) provided on the shaft (31) of the putter (30) opposite to the shaft (31) is smaller than the area of ​​the plane (3) of the one flat plate (1) opposite to the joint (16) with the support (10), (9) The golf putting practice device according to any one of (1) to (8) above, wherein the shape of the plane (4) on the opposite side of the shaft (31) of the other flat plate (2) attached to the shaft (31) of the putter (30) is a shape in which a part of a sector is cut out in concentric circles, (10) A golf putting practice device according to any one of (1) to (8) above, wherein the shape of the plane (4) on the opposite side of the shaft (31) of the other flat plate (2) provided on the shaft (31) of the putter (30) is a shape in which a portion of a sector is cut out in concentric circles, and the radius of the circle forming the outer arc of the shape in which a portion of the sector is cut out in concentric circles is 550 mm or more and 800 mm or less, and the radius of the circle forming the inner arc of the shape in which a portion of the sector is cut out in concentric circles is 400 mm or more and less than 550 mm. (11) A golf putting practice device according to any one of (1) to (8) above, wherein the shape of the plane (4) on the opposite side of the shaft (31) of the other flat plate (2) provided on the shaft (31) of the putter (30) is a shape in which a portion of a sector is cut out in concentric circles, and the radius of the circle forming the outer arc of the shape in which a portion of the sector is cut out in concentric circles is 580 mm or more and 630 mm or less, and the radius of the circle forming the inner arc of the shape in which a portion of the sector is cut out in concentric circles is 480 mm or more and 530 mm or less. (12) The shape of the plane (4) on the opposite side of the shaft (31) of the other flat plate (2) provided on the shaft (31) of the putter (30) is a shape in which a portion of a sector is cut out in concentric circles, and the radius of the circle forming the outer arc of the shape in which a portion of the sector is cut out in concentric circles is 600 mm, and the radius of the circle forming the inner arc of the shape in which a portion of the sector is cut out in concentric circles is 500 mm, a golf putting practice device according to any one of (1) to (8) above. (13) A golf putting practice device according to any one of (1) to (12) above, wherein one of the flat plates (1) is transparent or semi-transparent. One could list these: [Effects of the Invention] 【0014】 According to the golf putting practice device of the present invention, each player can easily find a swing surface suitable for himself in a short time. As a result, repeated practice of putting on a swing surface suitable for each player becomes possible, enabling the acquisition of an accurate putting form and stabilizing the hitting direction of the ball in putting. Thereby, a remarkable improvement in the putting technique of each player can be achieved. In addition, the golf putting practice device is simple and inexpensive to handle. 【Brief Description of the Drawings】 【0015】 [Figure 1] FIG. 1 is a side view showing an outline of an embodiment of the golf putting practice device of the present invention. [Figure 2] FIG. 2 is a side view showing an outline of the fixture (20) shown in FIG. 1. [Figure 3] FIG. 3 is a plan view showing an outline of the fixture (20) shown in FIG. 1. [Figure 4] FIG. 4 is a perspective view showing an outline of another embodiment of the golf putting practice device of the present invention. [Figure 5] FIG. 5 is a perspective view of one flat plate (1) and a support portion (10) of the golf putting practice device shown in FIG. 4 as viewed from the player's standing position side. [Figure 6] FIG. 6 is a perspective view of one flat plate (1), a support portion (10), and a putting mat (34) of the golf putting practice device shown in FIG. 4 as viewed from an upper diagonal direction. [Figure 7] FIG. 7 is a schematic view of a golf putt practice device shown in Patent Document 1. <​​​​​​​​The golf putting practice device of the present invention will now be described based on the drawings. Figure 1 is a schematic side view of one embodiment of the golf putting practice device of the present invention, showing the state of use of the putting practice device. As shown in Figure 1, the golf putting practice device of the present invention comprises two separate flat plates (1, 2), and has a structure that allows the opposing planes (3, 4) of the two flat plates (1, 2) to come into contact with each other when practicing putting with the putting practice device, that is, when using the putting practice device. 【0017】 One flat plate (1) is held in the air by a support (10). The support (10) has a structure that allows the angle (θ) of the plane (3) of the flat plate (1) opposite to the connection (16) with the support (10), that is, the plane (3) facing (contacting) the other flat plate (2), with respect to the horizontal direction (Hd) to be changed and / or fixed. In rare cases, the connection (16) between the flat plate (1) and the support (10) may be provided on the side of the flat plate (1), but when used as a golf putting practice device, devices that produce the same effect as the present invention, for example, devices in which the opposing planes (3,4) of two flat plates (1,2) are in contact are included in the scope of the present invention. The angle (θ) is adjustable in the range of preferably 65 to 80 degrees, more preferably 68 to 80 degrees, even more preferably 70 to 80 degrees, and particularly preferably 70 to 78 degrees, relative to the horizontal direction, so that each player (individual) can find a swing plane that suits them and can repeatedly practice putting using that found swing plane. Here, the swing plane refers to the plane that includes the arc formed by the center (Pc) of the putter head (32) (face (33)) with the body part (Bc) as the center of rotation, with the body part (Bc) as the center of rotation, and the arc as the outer circumference. Therefore, the angle (θ) is usually greater than or equal to the lie angle (θ1) of the putter used by each player (individual). Note that the lie angle (θ1) of a putter is stipulated by the rules to be 80 degrees or less. Furthermore, as shown in Figure 1, the sole of the putter is usually nearly parallel to the floor, so the angle (θ1) is the lie angle of the putter, but it may change slightly depending on each player's toe-up or heel-up stance. 【0018】 In the golf putting practice device of the present invention, the support part (10) can hold one flat plate (1) in the air as described above, and if it is possible to change and / or fix the angle (θ) of the plane (3) of the one flat plate (1) opposite to the connection part (16) with the support part (10), that is, the plane (3) facing (contacting) the other flat plate (2), with respect to the horizontal direction (Hd), then a generally known structure can be adopted. For example, the support part (10) shown in Figure 1 can be cited. The support unit (10) includes a base (11) that can be stably installed on a mounting surface (mainly the floor) even while the putting practice device is in use, an axis (12) that extends upward substantially vertically from the base (11), a height adjustment device (13) optionally provided midway along the axis (12), and an arm (15) to which one flat plate (1) is attached via an angle change fixing device (14) provided near the top of the axis (12). In the support unit (10), the angle (θ) of the plane (3) of one flat plate (1) with respect to the horizontal direction (Hd) can be changed by adjusting the arm (15) up and down using the angle change fixing device (14) (angle not shown) to a predetermined angle, and then fixing it by screwing the angle change fixing device (14) in place. Furthermore, the height of one of the flat plates (1) from the mounting surface of the putting practice device can be adjusted as appropriate using the height adjustment device (13) to match the player's height, etc. In practice, unless there is a significant difference in height between players, this height rarely needs to be changed, so the height adjustment device (13) may not be installed. 【0019】 The other flat plate (2) is detachably attached to the shaft (31) of the putter (30) by a mounting device (20). The mounting device (20) also allows the other flat plate (2) to slide vertically along the shaft (31) of the putter (30). The other flat plate (2) is positioned relative to the shaft (31) on the toe (Pt) side of the putter head (32), in other words, on the side of the shaft (31) that is almost opposite the player, and is positioned so that when in use, the other flat plate (2) and the one flat plate (1) face each other (contact each other). Furthermore, when the other flat plate (2) is viewed from a direction approximately perpendicular to the face (33) of the putter head (32), only its approximately side surface (6) is visible. Figure 1 shows the golf putting practice device of the present invention as viewed from a direction substantially perpendicular to the face (33) of the putter head (32). The face (33) of the putter head (32) refers to the substantially flat surface that contacts the golf ball during putting, and typically the face (33) of the putter head (32) has a loft (inclination) angle of approximately 3 degrees. In this specification, the "direction substantially perpendicular to the face (33) of the putter head (32)" refers to the direction when the loft angle is assumed to be 0 degrees. Note that the loft (inclination) angle is stipulated by the rules to be 10 degrees or less. 【0020】 The mounting device (20) has a structure that allows the angle (θ') with respect to the shaft (31) to be changed and / or fixed, such that when the other flat plate (2) is viewed from a direction substantially perpendicular to the face (33) of the putter head (32), the straight line (L) formed by extending the side (5) of the other flat plate (2) opposite to the shaft (31), i.e., the side (5) that becomes the side of the one flat plate (1) when in use, passes through the center (Pc) of the putter head (32). In other words, the mounting device (20) has a structure that allows the angle (θ') of a straight line (L) with respect to the shaft (31) to be changed and / or fixed when the other flat plate (2) is viewed from a direction substantially perpendicular to the face (33) of the putter head (32), by extending the side (5) of the other flat plate (2) that is opposite to the shaft (31), i.e., the side (5) that becomes the side of the one flat plate (1) when in use, to connect with the center (Pc) of the putter head (32). The angle (θ') can be adjusted and / or fixed by the mounting device (20) to an angle corresponding to the swing plane set by each player. In this case, first, the angle (θ') can be adjusted and fixed, and then the angle (θ) of the plane (3) of the first flat plate (1) with respect to the horizontal direction (Hd) can be adjusted and fixed so that the plane (4) of the other flat plate (2) contacts the plane (3) of the first flat plate (1). Alternatively, in order to bring the plane (4) of the other flat plate (2) into contact with the plane (3) of the first flat plate (1), the opposite can be done: first, the angle (θ) of the plane (3) of the first flat plate (1) with respect to the horizontal direction (Hd) can be adjusted and fixed using the angle adjustment and fixing device (14) of the support part (10) to an angle corresponding to the swing plane set by each player, and then the angle (θ') can be adjusted and fixed using the mounting fixture (20) so that the plane (4) of the other flat plate (2) contacts the plane (3) of the first flat plate (1). The latter method is usually preferred because it is simpler.The angle (θ) of the plane (3) of one of the flat plates (1) opposite to the joint (16) with the support (10), that is, the plane (3) that faces (contacts) the other flat plate (2) when in use, with respect to the horizontal direction (Hd), is determined when the angle corresponding to the swing surface that each player intends to practice is determined. Furthermore, when the other flat plate (2) is viewed from a direction substantially perpendicular to the face (33) of the putter head (32), the angle (θ') of the straight line (L) formed by extending the side (5) of the side surface (6) of the other flat plate (2) opposite to the shaft (31) is determined to pass through the center (Pc) of the putter head (32). This angle (θ') of the straight line (L) connecting the center (Pc) of the putter head (32) to the shaft (31) is automatically determined once the angle (θ) is determined. As already stated, the angle (θ) is the angle corresponding to the swing plane suited to each player (individual), preferably in the range of 65 to 80 degrees, more preferably 68 to 80 degrees, even more preferably 70 to 80 degrees, and particularly preferably 70 to 78 degrees. Therefore, the angle (θ') depends on the lie angle of the putter used by each player, and furthermore, on the sole position of each player in putting, e.g., toe-up, heel-up, but it is preferable that it be changeable and / or fixed in the range of preferably 0 to 15 degrees, more preferably 0 to 12 degrees. Here, an angle (θ') of 0 degrees means that the plane (4) of the other flat plate (2) is parallel to the shaft (31) of the putter (30). 【0021】 In the golf putting practice device of the present invention, the mounting device (20) can employ a commonly known structure as long as the other flat plate (2) can be detachably attached to the shaft (31) of the putter (30) as described above, and the angle (θ') of the straight line (L) with respect to the shaft (31) can be changed and / or fixed, preferably within the range of the predetermined angle. For example, the mounting device (20) shown in Figure 1 can be used. Figure 2 is a schematic side view of the mounting device (20), showing the side opposite to the side of the mounting device (20) shown in Figure 1. Figure 3 is a schematic top view of the mounting device (20), showing the plane as seen from above the straight line (L) shown in Figure 1. However, all figures show the state before the putter (30) is attached, and the details of the structure of the part to which the putter (30) is attached are not shown. The angle adjustment and fixing device (21) consists of an angle adjustment valve (23) and a connection part (24) to the other flat plate (2). When in use, the angle can be changed to a predetermined angle by loosening the angle adjustment valve (23), and the angle can be fixed to a predetermined angle by tightening the angle adjustment valve (23). The forward and backward movement and fixing device (22) consists of a slide valve (25) and a slide rail (26). When the angle of the flat plate (2) is changed, the slide valve (25) is loosened and the slide rail (26) is moved forward and backward to adjust the straight line (L) toward the center (Pc) of the putter head, and then the slide valve (25) is tightened to fix it in the predetermined position. The slide rail (26) has a scale that indicates the approximate fixed position. The putter (30) is secured by setting the putter shaft (31) inside the fixing device (28), rotating the fixing device (29) to clamp the putter shaft (31) between both fixing devices, fitting the fixing valve (27) into the predetermined position on the fixing device (28), and tightening the fixing valve (27). By loosening the fixing valve (27), the other flat plate (2) can also be moved up and down relative to the shaft (31) of the putter (30).Regarding the adjustment of the angle (θ') relative to the straight line (L) shaft (31), typically, the angle (θ) of the plane (3) of one flat plate (1) relative to the horizontal direction (Hd) is set and fixed to an angle corresponding to the swing plane suited to each player. Meanwhile, both the angle adjustment valve (23) and slide valve (25) of the mounting fixture (20) attached to the putter shaft (31) are loosened, and by visual inspection, the center (Pc) of the putter head is positioned so that it lies on the extension of the plane (3) of one flat plate (1), i.e., on the straight line (L). Then, the plane (4) of the other flat plate (2) opposite to the shaft is brought into complete contact with the plane (3) of one flat plate (1). At this position, both the angle adjustment valve (23) and slide valve (25) of the mounting fixture (20) are tightened to set and fix the angle (θ') to a predetermined value. In this case, in order to clearly define the position of the extension line of the plane (3) of one of the flat plates (1), the position can be determined in advance by visual inspection, and a golf ball can be set at the determined position, for example, with its center aligned to that position. Alternatively, a putting mat can be set at the predetermined position, for example, with the target line of the putting mat aligned to that position. 【0022】 In the golf putting practice device of the present invention, there are no particular restrictions on the material of the two flat plates (1,2). A material that is relatively strong, lightweight, and inexpensive is preferred. Typically, plastic, such as polycarbonate, is used. There are no particular restrictions on the shape of one of the flat plates (1) that is held in the air by the support part (10), but it is preferable that the plane (3) of one of the flat plates (1) is rectangular and it is a thin rectangular parallelepiped. There are no particular restrictions on the dimensions of the plane (3) of the one of the flat plates (1), but it is preferable that it is an appropriate size for the golf putting practice device of the present invention. If the shape of the plane (3) is rectangular, it is preferably 400 to 600 mm wide, 100 to 300 mm long, and 3 to 8 mm thick. There are no particular restrictions on the shape of the other flat plate (2) that is detachably attached to the shaft (31) of the putter (30) by a mounting fixture (20), but it is preferable that the plane (4) of the other flat plate (2) is shaped like a portion of a sector cut out in concentric circles. There are no particular restrictions on the dimensions of the other flat plate (2), but it is preferable that the area of ​​the plane (4) of the other flat plate (2) is smaller than the area of ​​the plane (3) of the first flat plate (1) held in the air by the support part (10). If the area of ​​the plane (4) of the other flat plate (2) is larger than the area of ​​the plane (3) of the first flat plate (1) held in the air by the support part (10), putting practice may not be able to be performed smoothly. If the shape of the plane (4) of the other flat plate (2) is a shape in which a part of a sector is cut out in concentric circles, the radius of the circle forming the outer arc is preferably 550 mm or more and 800 mm or less, more preferably 580 mm or more and 630 mm or less, and most preferably 600 mm, and the radius of the circle forming the inner arc is preferably 400 mm or more and less than 550 mm, more preferably 480 mm or more and 530 mm or less, and most preferably 500 mm. Furthermore, the central angle of the sector is preferably 5 to 35 degrees, more preferably 10 to 30 degrees, and even more preferably 15 to 25 degrees. Also, the thickness of the other flat plate (2) is preferably 5 mm or less, more preferably 3 mm or less, and even more preferably 2 to 5 mm.The other flat plate (2), which is detachably attached to the shaft (31) of the putter (30) by a mounting device (20), is preferable to be as lightweight as possible given the nature of the golf putting practice device of the present invention. Therefore, its material, shape, dimensions, etc., should be appropriately changed within a range that allows for smooth putting practice. Furthermore, in the golf putting practice device of the present invention, putting practice is performed while the flat surface (3) of one flat plate (1), which is held in the air by a support part (10), is in contact with the flat surface (4) of the other flat plate (2), which is detachably attached to the shaft (31) of the putter (30) by a mounting device (20). As a result, the flat surface (4) of the other flat plate (2) moves in an arc on the flat surface (3) of the one flat plate (1). Therefore, in order for this movement to be performed smoothly, fine irregularities may be provided on both or one of the flat surfaces (3) of the one flat plate (1) and the flat surface (4) of the other flat plate (2). Furthermore, it is preferable that one of the flat plates (1) be transparent or semi-transparent so that the player can visually confirm the movement of the other flat plate (2) as it moves in an arc through the other flat plate (1) during putting practice, and that the other flat plate (2) be shaped by cutting out a portion of the aforementioned sector shape in a concentric circle manner. In this way, the movement of the other flat plate (2) allows the player to confirm a movement that approximates the trajectory of the putter head in their own swing, and thus the golf putting practice device of the present invention can contribute to further improvement of putting technique. 【0023】 Based on Figure 1, an example of a method for aligning the axis forming the swing plane, i.e., the straight line L in Figure 1, with the center (Pc) of the putter head (face) (32(33)) in the golf putting practice device of the present invention will be described. First, the angle changing and fixing device (14) of the support part (10) is used to set and fix the angle (θ) of the plane (3) of one flat plate (1) opposite to the connection part (16) with the support part (10), i.e., the plane (3) on the side facing (contacting) the other flat plate (2), with respect to the horizontal direction (Hd) to a predetermined value, for example, in the range of 65 to 80 degrees. Next, for example, a golf ball or a putting mat with a target line drawn on it is set on the surface on which the base (11) of the support part (10) is installed (the support part installation surface, for example, the floor). In the case of a golf ball, the golf ball is visually positioned so that its approximate center intersects with the plane (3) of the flat plate (1) in the direction of the support installation surface, near the center of the side (3) of the flat plate (1) that is approximately parallel to the support installation surface (in Figure 1, the shape of the plane (3) is rectangular). In the case of a putting mat, the putting mat is visually positioned so that the plane (3) of the flat plate (1) extended in the direction of the installation surface aligns with the target line (center line) drawn on the putting mat. Next, the angle adjustment locking device (21) and the forward / backward movement locking device (22) constituting the mounting fixture (20) are adjusted so that the plane (4) of the other flat plate (2), which is detachably attached to the shaft (31) of the putter (30) by the mounting fixture (20), opposite to the shaft (31), that is, the plane (4) facing (contacting) the flat plate (1), is in complete contact with the plane (3) of the flat plate (1). At this time, as already mentioned, the adjustment can be easily made by loosening both the angle adjustment valve (23) of the angle adjustment locking device (21) and the slide valve (25) of the forward / backward movement locking device (22). This makes it possible to align the axis forming the swing plane with the center (Pc) of the putter head (face) (32 (33)). 【0024】 Hereinafter, another embodiment of the golf putting practice device of the present invention will be described with reference to Figures 4, 5, and 6. Figure 4 is a schematic perspective view (partially omitted) of another embodiment of the golf putting practice device of the present invention, Figure 5 is a perspective view of one flat plate (1) and its support part (10) as seen from the player's (hitter's) standing position, and Figure 6 is a perspective view of one flat plate (1), its support part (10), and putting mat (34) as seen from above and obliquely. As shown in Figure 4, the golf putting practice device of another embodiment of the present invention is equipped with one flat plate (1) and the other flat plate (2) separately. One flat plate (1) is held in the air by its support part (10). As shown in Figure 5, the support (10) consists of a base (11), a shaft (12), an angle-changing and fixing device (14), an arm (15), and a coupling part (16) to one of the flat plates. One of the flat plates (1) is connected to the arm (15) by the two coupling parts (16) and is held in the air by the support (10). Here, one of the flat plates (1) is transparent or translucent, and the two coupling parts (16) are connected to the surface of the flat plate (1) opposite to the plane (3). Furthermore, the angle (θ) of the flat plate (1) with respect to the horizontal direction (Hd) of the plane (3) opposite to the coupling part (16) to the support (10) can be changed to a predetermined angle by an angle-scaled lever (17) attached to the arm (15) in conjunction with the angle-changing and fixing device (14), and can be fixed at that angle. In this embodiment, the dimensions of one of the flat plates (1) are 200 mm in length, 500 mm in width, and 5 mm in thickness, and the height of the shaft (12) can be changed within a range of 300 to 650 mm by a height adjustment device (not shown in Figures 4 and 5). 【0025】 As shown in Figure 4, the other flat plate (2) is detachably attached to the shaft (31) of the putter (30) by a mounting fixture (20), and is positioned on the toe (Pt) side of the putter head (32) relative to the shaft (31). Furthermore, the plane (4) of the other flat plate (2), that is, the plane (4) of the other flat plate (2) opposite to the shaft (31), and the plane (3) of the one flat plate (1) are in contact at a predetermined angle (θ) with respect to the horizontal direction (Hd). Here, the mounting fixture (20) has a structure that allows the angle (θ') of the plane (4) of the other flat plate (2) opposite to the shaft (31) to be changed within a predetermined range and fixed at a predetermined angle. In actual operation, as already described, the angle adjustment valve (23) and slide valve (25) of the mounting fixture (20) are loosened to allow the angle of the other flat plate (2) to be freely changed within a predetermined range, and the slide rail (26) to be freely moved back and forth. In this state, the flat surface (4) of the other flat plate (2) is brought into contact with the flat surface (3) of the one flat plate (1), which has been set to a predetermined angle (θ) in advance, and the angle adjustment valve (23) and slide valve (25) are tightened in this state. This makes it possible to set the angle (θ') of the flat surface (4) of the other flat plate (2) opposite to the shaft (31) to the predetermined angle, and to bring the flat surface (4) of the other flat plate (2) into complete contact with the flat surface (3) of the one flat plate (1). Here, the shape of the plane (4) of the other flat plate (2) is, in Figure 4, a shape obtained by concentrically cutting out a portion of a sector with its center in the upper direction of the plane (4) of the other flat plate (2), with the radius of the circle forming the outer arc being 600 mm and the radius of the circle forming the inner arc being 500 mm. The central angle of the sector is 20 degrees. The thickness of the plane (4) of the other flat plate (2) is 3 mm. 【0026】 The method for adjusting and fixing the angle (θ) of the plane (3) of one of the flat plates (1) opposite to the connection part (16) with the support part (10) to a predetermined angle with respect to the horizontal direction (Hd) is arbitrary. In the golf putting practice device of the present invention shown in Figures 4, 5 and 6, the angle (θ) can be easily adjusted to a predetermined angle by aligning the scale to a predetermined angle and fixing it using a lever (17) with an angle scale attached to an arm (15) which is linked to an angle change fixing device (14). Furthermore, in this putting practice device, when the angle (θ) of the plane (3) of one of the flat plates (1) with respect to the horizontal direction (Hd) is set to a predetermined angle, for example, 74 degrees, using the lever with an angle scale (17), the plane (3) is extended downward and a straight line is drawn intersecting the contact surface of the base (11). This line is then extended in the direction of the angle scale (18) of the base, and the angle shown on the angle scale (18) of the base at the point of intersection coincides with the predetermined angle, for example, 74 degrees. Therefore, when practicing putting, when the angle (θ) of the plane (3) of one of the flat plates (1) with respect to the horizontal direction (Hd) is set to a predetermined angle, for example, 74 degrees, the center (Pc) of the putter head should be aligned with a straight line drawn approximately perpendicular to the same angle, for example, 74 degrees, shown on the angle scale (18) of the base; in other words, parallel to the long side (horizontal side) of the rectangle of the plane (3) of the flat plate (1). As shown in Figure 6, for example, if a putting mat (34) is used, the target line (35) of the putting mat can be aligned with a predetermined angle indicated on the angle scale (18) of the base, for example, 74 degrees, and a golf ball can be placed on the center line (35) so that its center coincides with the target line (35). Then, golf putting practice can be performed by ensuring that the center (Pc) of the putter head hits the center of the golf ball. [Industrial applicability] 【0027】 The golf putting practice device of the present invention can significantly improve the putting skills of golf players, and is therefore expected to be used by a large number of golf players in the future, thereby making a significant contribution to the golf industry. [Explanation of symbols] 【0028】 1. One flat plate held in the air by a support. 2. The other flat plate is attached to the putter shaft by a mounting fixture, and is detachable. 3. The plane opposite to the joint with the support part of one of the flat plates 4. The plane opposite the shaft of the other flat plate 5. The side of the other flat plate opposite to the shaft 6. Side of the other flat plate 10 Support part 11 Base 12 axes 13 Height adjustment device 14 Angle adjustment and locking device 15 Arm 16. Joint between one of the flat plates and the support part 17. Lever with angle scale for angle adjustment and locking device 18 Angle scale on the base 20 Mounting hardware 21 Angle adjustment fixing device 22 Back and forth movement fixing device 23 Angle adjustment valve 24 Connection part 25 Slide Valve 26 slide rails 27 Fixed valve 28,29 Fixtures 30 putters 31 Putter shaft 32 Putter Heads 33 Putter head face 34 Putting Mats 35. Target line on the putting mat Extend side L (5) and connect it to the center of the putter head. PC putter head center Pt putter head toe Ph putter head heel hd horizontal θ is the angle of the plane (3) relative to the horizontal. θ' Angle of the straight line (L) relative to the shaft θ1 Putter Lie Angle

Claims

[Claim 1] A golf putting practice device comprising two separate flat plates (1, 2), (A) One flat plate (1) held in the air by a support (10), wherein the support (10) has a structure that can change and / or fix the angle (θ) of the plane (3) of the one flat plate (1) opposite to the connection (16) with the support (10) with respect to the horizontal direction (Hd), and (B) The other flat plate (2) is attached to the shaft (31) of the putter (30) by a mounting fixture (20), wherein the other flat plate (2) is attached to the toe (Pt) side of the putter head (32) with respect to the shaft (31), and the other flat plate (2) is positioned such that when viewed from a direction substantially perpendicular to the face (33) of the putter head (32), only substantially the side (6) of the other flat plate (2) is visible. The mounting fixture (20) is provided with such a structure that, when the other flat plate (2) is viewed from a direction substantially perpendicular to the face (33) of the putter head (32), the angle (θ') of the straight line (L) formed by extending the side (5) of the side surface (6) of the other flat plate (2) opposite to the shaft (31) passes through the center (Pc) of the putter head (32) can be changed and / or fixed. A golf putting practice device equipped with [features / equipment]. [Claim 2] The golf putting practice device according to claim 1, wherein the other flat plate (2) has a structure that allows the plane (4) opposite to the shaft (31) to contact the plane (3) of the one flat plate (1) opposite to the coupling portion (16) with the support portion (10). [Claim 3] The golf putting practice device according to claim 1 or 2, wherein the support portion (10) has a structure that allows the angle (θ) of the plane (3) of the one flat plate (1) opposite to the connection portion (16) with the support portion (10) to be changed and / or fixed within a range of 65 to 80 degrees with respect to the horizontal direction (Hd). [Claim 4] The golf putting practice device according to claim 1 or 2, wherein the area of ​​the plane (4) of the other flat plate (2) provided on the shaft (31) of the putter (30) opposite to the shaft (31) is smaller than the area of ​​the plane (3) of the one flat plate (1) opposite to the connection portion (16) with the support portion (10). [Claim 5] The golf putting practice device according to claim 1 or 2, wherein the shape of the plane (4) on the opposite side of the shaft (31) of the other flat plate (2) provided on the shaft (31) of the putter (30) is a shape in which a portion of a sector is cut out in a concentric circular shape. [Claim 6] The golf putting practice device according to claim 1 or 2, wherein one of the flat plates (1) is transparent or translucent.

Images