Takeaway posture confirmation device

Abstract

Provide a takeaway posture confirmation device that enables the user to visually recognize the state of the club shaft at the takeaway stage using a light source, so that the user can practice the correct takeaway posture. 【Solution means】In a golf club for confirming the state of the takeaway posture, the golf club includes a head 100, a shaft 120, and a grip 130, and a slit beam irradiation unit that irradiates a slit beam at a certain angle to a predetermined part of the head 100 or the shaft is arranged. Optionally, the slit beam irradiation unit 200 may be arranged at a predetermined part of the head 100 or the shaft. The slit beam irradiation unit is provided with a fixing part 210 fixed to the shaft and a laser generation part 250 fixed by the fixing part and irradiating a slit beam 270. The takeaway posture confirmation device is characterized in that the slit beam 270 emitted from the laser generation part is irradiated onto the floor surface 90 on which a golf ball is placed to form a beam locus 255.

Description

Technical Field

[0001] The present invention relates to a take-away posture confirmation device, and more particularly to a take-away posture confirmation device that enables a user to acquire a correct posture at the take-away stage using a light source.

Background Art

[0002] A golf swing is divided into stages such as address (posture), take-away (take-back), backswing (halfway back), top of backswing, downswing (halfway down), impact, release, and follow-through.

[0003] As shown in FIG. 1, the take-away starts from the address posture (a) and the point where the club becomes horizontal is called the take-away stage (b). Generally, when the clockwise direction is used as a reference, the direction of the arm is called around 8 o'clock with respect to the clockwise direction.

[0004] Although the postures of all stages are important, generally, the take-away, which is the starting stage of the backswing, is the starting stage of the swing. The correct movement at this stage is the basis for making the remaining swing correct. If it starts from an incorrect posture at this stage, it is generally said that it is difficult to make a consistent swing with a compensation action being performed at any of the remaining stages.

[0005] On the other hand, referring to FIG. 2, generally, three types of elements are used as elements for checking whether the take-away operation is performed desirably. That is, in FIG. 2(a), it is the state when the user is viewed from the front (front side). It is a preferable posture that the club shaft is horizontal with the ground. When the distance to the horizontal is short (not reaching the horizontal), little use of the wrist is made, and when it exceeds the horizontal, it shows the case where wrist cocking has been performed in advance.

[0006] In the case of Fig. 2(b), it shows the state when viewed from the back (side) of the user. Although the club shaft is horizontal to the ground, when it is parallel to the target, it is regarded as a suitable posture. There are two cases: when the head faces outside the target (outside takeaway) with the grip part as a reference, and when the head faces inside (inside takeaway).

[0007] As shown in Fig. 2(c), although the club shaft is parallel to the ground and parallel to the target, when the toe of the club head faces upward perpendicular to the ground, it is called "square". When the toe of other club heads is substantially parallel to the inclined spinal angle of the user, it is regarded as a suitable posture, and the state where the club face is closed is called "close".

[0008] Furthermore, when the toe of the club head faces the human body side, it is called the "open" posture of the club head, which is said to be an undesirable posture often seen in amateurs.

[0009] Therefore, it is important to practice with a suitable posture at the initial stage of the swing while confirming in real time that the user has the correct posture at the takeaway stage during swing practice. The devices and methods provided for such purposes are very important.

[0010] However, devices and methods that can practice the takeaway posture are rarely found. Although it has been proposed to use a camera and motion sensing sensors such as inertial sensors as swing analysis devices and methods, most of them are devices and methods that analyze the entire swing trajectory and plane and provide them to the user by comparing with a reference posture and the like. Therefore, there is a current demand for a device that can practice the takeaway posture.

Prior Art Documents

Patent Documents

[0011]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0012] The present invention was created to solve the above-described problems, and its object is to provide a takeaway posture confirmation device that enables the user to visually recognize the state of the club shaft at the takeaway stage using a light source, so that the user can practice the correct takeaway posture.

[0013] However, the object of the present invention is not limited to the above-described object at all, and other objects not mentioned should be clearly understood by those skilled in the art from the description of the invention described below.

Means for Solving the Problems

[0014] To achieve the above object, the present invention provides a golf club for confirming the state of the takeaway posture, wherein the golf club includes a head 100, a shaft 120, and a grip 130, and a slit beam irradiation unit for irradiating a slit beam at a certain angle to the head 100 or the shaft is disposed. In some cases, the slit beam irradiation unit 200 may be disposed on the shaft close to the head.

[0015] Further, the slit beam irradiation unit is provided with a fixing portion 210 fixed to the shaft, and a laser generation portion 250 fixed by the fixing portion and irradiating a slit beam 270. It is preferable to irradiate the floor surface 90 on which the golf ball is placed with the slit beam 270 emitted from the laser generation portion to form a beam locus 255.

[0016] At this time, the beam locus 255 is irradiated to other positions on the floor surface depending on the position of the golf club in the takeaway posture, the beam locus is irradiated to a position where the user taking the takeaway posture can confirm, and the slit beam irradiation unit 200 is preferably disposed on the shaft close to the head so that the angle of the golf head can be confirmed.

[0017] Here, it is preferable to control the irradiation angle of the laser so that the beam locus irradiated from the laser generation portion 250 to the floor surface is irradiated to a position where the user can confirm in the takeaway posture.

[0018] Also, when looking at the user using the golf club from the front, when taking the takeaway posture by moving the golf club to the left in the address posture, the position of the golf club is defined through the relative position between the head and the grip of the golf club in the takeaway posture. When looking at the user from the front of the user using the golf club, a 11th position in which the head is disposed above the grip, a 12th position in which the head and the grip are disposed at the same height and the shaft of the golf club is disposed parallel to the floor surface, and a 13th position in which the head is disposed below the grip are defined.

[0019] Here, when looking at the user from the right side of the user, a 21st position where the head is located on the left side of the grip (the head moves to the rear side of the user), a 22nd position where the head coincides with the grip, and a 23rd position where the head is located on the right side of the grip (the head moves to the front side of the user) are defined.

[0020] Here, the front side of the golf head is defined as the toe, the rear side as the heel, a straight line perpendicular to the floor surface passing through the heel is defined as the heel vertical line. When defining the position of the golf head according to the angle at which the golf head is placed when looking at the user from the right side of the user while the golf club is holding the first normal position, with the heel vertical line as 0°, the left side direction as the "-" angular direction, and the right side direction as the "+" angular direction with respect to the heel vertical line, the heel is in a state of being located on the heel vertical line, and the toe is arranged at a 31st position of -45° to less than 0° on the left side of the heel vertical line, a 32nd position of 0° to less than 30° on the right side of the heel vertical line, and a 33rd position of 31° to 90° on the right side of the heel vertical line.

[0021] At this time, a position that simultaneously satisfies the 12th position, the 22nd position, and the 32nd position is defined as the normal position. When the beam trajectory irradiated from the normal position to the floor surface is defined as the normal irradiation trajectory 300, and the beam trajectory irradiated from the remaining positions except the normal position is defined as the abnormal position trajectory, the normal position trajectory and the abnormal position trajectory are irradiated to different floor surfaces, respectively.

[0022] Also, with a right-handed user in the takeaway posture as a reference, the upper direction is the +z-axis direction, the lower direction is the -z-axis direction, the left side direction is the +y-axis direction, the right side direction is the -y-axis direction, the front side direction is the +x-axis direction, and the rear side direction is the -x-axis direction. When the center of the normal irradiation locus 300 is defined as the origin, the normal irradiation locus 300 is parallel to the y-axis, and controls the irradiation angle of the laser so as to be irradiated between the user's toes 151 and the golf ball 150. However, its irradiation range is controlled so as to exceed both sides with respect to the golf ball 150, and it is preferable that the user is irradiated at a position where the normal irradiation locus 300 of the laser can be recognized in the takeaway posture.

[0023] Furthermore, when viewing the user from the right side with the golf club arranged parallel to the y-axis, when rotating the golf head in the counterclockwise direction, the beam locus is irradiated to be the 31st locus 255CC that moves in the +x-axis direction so as to be parallel to the normal irradiation locus 300. When rotating the golf head in the clockwise direction, the beam locus is irradiated to be the 33rd locus 255CW that moves in the -x-axis direction so as to be parallel to the normal irradiation locus 300, and it is preferable that the user is irradiated at a position where the 31st locus and the 33rd locus can be confirmed in the takeaway posture.

[0024] Moreover, when moving the golf head upward with the golf club arranged parallel to the y-axis, the beam locus is irradiated to be the 11th locus 255U that moves in the -y direction from the normal irradiation locus 300. When moving the golf head downward, the beam locus is irradiated to be the 13th locus 255D that moves in the +y direction from the normal irradiation locus 300, and it is preferable that the user is irradiated at a position where the 21st locus and the 13th locus can be confirmed in the takeaway posture.

[0025] Furthermore, when the terminal portion close to the laser generating unit in the beam trajectory is defined as the first end point 271 and the terminal portion on the opposite side is defined as the second end point 272, when the golf head is moved backward with the golf club arranged parallel to the y-axis, the beam trajectory is inclined with respect to the normal irradiation trajectory 300, and is irradiated so as to form a 21st trajectory 255R in which the first end point 271 moves in the -x axis direction. When the golf head is moved forward, the beam trajectory is inclined with respect to the normal irradiation trajectory 300, and is irradiated so as to form a 23rd trajectory 255F in which the first end point 271 moves in the +x axis direction, and the user is irradiated at a position where the 21st trajectory and the 23rd trajectory can be confirmed in the takeaway posture.

[0026] Furthermore, at the position where the normal irradiation trajectory 300 irradiates the floor surface, a normal irradiation marker 310 capable of confirming the position of the normal irradiation trajectory is arranged. The floor surface 90 is formed of a carpet or a rubber plate, and the normal irradiation marker 310 is preferably formed by sticking a sticker on the floor surface or by printing.

[0027] The fixing portion 210 and the laser generating unit 250 in the slit beam irradiation unit are connected by a hinge 260 and arranged so that the irradiation direction of the slit beam irradiated on the floor surface can be changed by rotating the laser generating unit. The fixing portion 210 may be assembled rotatably with respect to the center of the shaft 120 and arranged so that the irradiation direction of the slit beam irradiated on the floor surface can be changed by rotating left and right with respect to the center of the shaft.

[0028] The features and advantages of the present invention should become even more apparent from the following detailed description based on the accompanying drawings.

[0029] Prior to this, the terms and words used in this specification and the claims are not to be construed as limited to their ordinary or dictionary meanings. Instead, in accordance with the principle that the inventor can appropriately define the concept of the terms in order to best explain the invention, they are construed in meanings and concepts corresponding to the technical idea of the present invention.

Advantages of the Invention

[0030] As described above, according to the present invention, in the takeaway posture, the state and position of the user's golf club can be visually recognized using a light source, and the takeaway posture can be intuitively recognized in real time and the posture can be easily corrected.

Brief Description of the Drawings

[0031]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0032] Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The sizes, line thicknesses, etc. of the components shown in the drawings referred to in the description of the present invention may be exaggerated for ease of understanding, ease of explanation, and clarity.

[0033] Also, the terms described later used in the description of the present invention are defined in consideration of the functions in the present invention, and these may vary depending on the intentions or conventions of users and operators. Therefore, it can be said that the definitions of these terms are appropriately defined based on the overall content of this specification.

[0034] In addition, the following embodiments do not limit the scope of rights of the present invention, but are merely exemplary matters of the components disclosed in the claims of the present invention. Embodiments including components that can be substituted as equivalents in the components of the claims included in the technical idea throughout the specification of the present invention are to be construed as being included in the scope of rights of the present invention.

[0035] The attached Figure 1 is a front view schematically showing a normal address posture and a takeaway posture. Figure 2 is a diagram showing inspection elements for a correct posture in the takeaway posture. Figure 3 is a diagram schematically showing a golf club for checking the state of the takeaway posture according to a preferred embodiment of the present invention. Figure 4 is a diagram defining the position of the golf club through the relative positions of the head and the grip of the golf club in the takeaway posture according to a preferred embodiment of the present invention. Figures 5 to 7 are diagrams showing a normal irradiation locus and an abnormal position locus according to the takeaway posture according to a preferred embodiment of the present invention. Figure 6 is a diagram showing a normal irradiation locus and an abnormal position locus according to the takeaway posture according to a preferred embodiment of the present invention. Figure 8 is a diagram showing a view from the direction of "A" in Figure 4.

[0036] As shown in Figure 3, the golf club for checking the state of the takeaway posture of the present invention includes a head 100, a shaft 120, and a grip 130, and is characterized in that a slit beam irradiation unit for irradiating a slit beam at a certain angle to the head 100 or the shaft is arranged.

[0037] Also, although not shown, the slit beam irradiation unit may be provided together with the head, and in some cases, may be arranged near the head of the shaft, or in the middle of the shaft, or behind the grip of the shaft.

[0038] Furthermore, the slit beam irradiation unit 200 may be arranged on the shaft close to the head. The slit beam irradiation unit includes a fixing part 210 fixed to the shaft, and a laser generation part 250 fixed by the fixing part and irradiating a slit beam 270.

[0039] And it is characterized in that the golf ball irradiates the floor surface 90 on which the golf ball is placed with the slit beam 270 emitted from the laser generation part to form a beam locus 255.

[0040] That is, the user can visually confirm the beam trajectory irradiated on the ground and judge the takeaway posture, so as to correct the posture while visually confirming the beam trajectory in real time.

[0041] Also, the beam trajectory 255 is irradiated to other positions on the floor surface depending on the position of the golf club in the takeaway posture, and the beam trajectory is irradiated to a position that can be confirmed by the user taking the takeaway posture.

[0042] Furthermore, the slit beam irradiation unit 200 may be disposed on the shaft close to the head so that the angle of the golf head can be confirmed while the golf club maintains the normal position. At this time, the irradiation angle of the laser is controlled so that the beam trajectory irradiated from the laser generation unit 250 to the floor surface is irradiated to a position that can be confirmed by the user in the takeaway posture.

[0043] On the other hand, referring to FIG. 4, when looking at the user using the golf club from the front, when the golf club is moved to the left side in the address posture to take the takeaway posture, the position of the golf club is defined through the relative position between the head and the grip of the golf club in the takeaway posture.

[0044] Also, when looking at the user using the golf club from the front, a first 11th position in which the head is disposed above the grip, a 12th position in which the head and the grip are disposed at the same height and are disposed parallel to the floor surface of the golf club shaft, and a 13th position in which the head is disposed below the grip are defined.

[0045] Furthermore, when looking at the user from the right side of the user, define a 21st position in which the head is located to the left of the grip, a 22nd position in which the head coincides with the grip, and a 23rd position in which the head is located to the right of the grip, and define a position that simultaneously satisfies the 12th position and the 22nd position as a first normal position.

[0046] Furthermore, define the front side of the golf head as the toe and the rear side as the heel, define a straight line perpendicular to the floor surface passing through the heel as the heel vertical line, and define the position of the golf head according to the angle at which the golf head is placed when looking at the user from the right side of the user while the golf club is holding the first normal position.

[0047] Furthermore, when the heel vertical line is set to 0°, the left side direction with respect to the heel vertical line is the "-" angular direction, and the right side direction is the "+" angular direction, define a 31st position in which the heel is located on the heel vertical line and the toe is arranged at -45° to less than 0° on the left side of the heel vertical line, a 32nd position in which the toe is arranged at 0° to less than 30° on the right side of the heel vertical line, and a 33rd position in which the toe is arranged at 31° to 90° on the right side of the heel vertical line.

[0048] Furthermore, define a position that simultaneously satisfies the 12th position, the 22nd position, and the 32nd position as a normal position. When the beam trajectory irradiated from the normal position to the floor surface is the normal irradiation trajectory 300 and the beam trajectory irradiated from the remaining positions except the normal position is the abnormal position trajectory, the normal position trajectory and the abnormal position trajectory are irradiated to different floor surfaces from each other.

[0049] In addition to these, with reference to a right-handed user in the takeaway posture, the upper direction is defined as the +z-axis direction, the lower direction as the -z-axis direction, the left side direction (target direction) as the +y-axis direction, the right side direction as the -y-axis direction, the front side direction as the +x-axis direction, and the rear side direction as the -x-axis direction, and when the center of the normal irradiation locus 300 is defined as the origin, the normal irradiation locus 300 controls the irradiation angle of the laser so as to be irradiated between the user's toes 151 and the golf ball 150 while being parallel to the axis. Preferably, the irradiation range is controlled so as to exceed both sides with respect to the golf ball 150. Thereby, it is preferable that the user is irradiated at a position where the normal irradiation locus 300 of the laser can be recognized in the takeaway posture.

[0050] Also, referring to FIG. 5, when viewing the user from the right side with the golf club arranged parallel to the y-axis, when the golf head is rotated counterclockwise, the beam locus is irradiated so as to be a 31st locus 255CC that moves in the +x-axis direction so as to be parallel to the normal irradiation locus 300.

[0051] And when the golf head is rotated clockwise, the beam locus is irradiated so as to be a 33rd locus 255CW that moves in the -x-axis direction so as to be parallel to the normal irradiation locus 300, and the user is irradiated at a position where the 31st locus and the 33rd locus can be confirmed in the takeaway posture.

[0052] Also, referring to FIG. 6, when the golf head is moved upward with the golf club arranged parallel to the y-axis, the beam locus is irradiated so as to be an 11th locus 255U that moves in the -y direction from the normal irradiation locus 300.

[0053] And when the golf head is moved downward, the beam locus is irradiated so as to be a 13th locus 255D that moves in the +y direction from the normal irradiation locus 300, and the user is irradiated at a position where the 21st locus and the 13th locus can be confirmed in the takeaway posture.

[0054] Furthermore, referring to FIG. 7, when the terminal portion near the laser generation unit in the beam trajectory is defined as the first end point 271 and the terminal portion on the opposite side is defined as the second end point 272, when the golf head is moved backward with the golf club arranged parallel to the y-axis, the beam trajectory is inclined with respect to the normal irradiation trajectory 300, and is irradiated so as to be the 21st trajectory 255R in which the first end point 271 moves in the -x-axis direction.

[0055] Then, when the golf head is moved forward, the beam trajectory is inclined with respect to the normal irradiation trajectory 300, and is irradiated so as to be the 23rd trajectory 255F in which the first end point 271 moves in the +x-axis direction, and the user is irradiated at a position where the 21st trajectory and the 23rd trajectory can be confirmed in the takeaway posture.

[0056] Also, at the position where the normal irradiation trajectory 300 irradiates the floor surface, a normal irradiation marker 310 for confirming the position of the normal irradiation trajectory is arranged.

[0057] Furthermore, the floor surface 90 is formed of a carpet or a rubber plate, and the normal irradiation marker 310 may be formed by attaching a sticker to the floor surface, or may be formed by printing.

[0058] Furthermore, referring to FIGS. 3 and 8, the fixing portion 210 and the laser generation unit 250 in the slit beam irradiation unit are connected by a hinge 260 and arranged so that the irradiation direction of the slit beam irradiated onto the floor surface can be changed by rotating the laser generation unit.

[0059] Furthermore, the fixing portion 210 is rotatably set with respect to the center of the shaft 120 and arranged so that the irradiation direction of the slit beam irradiated onto the floor surface can be changed by rotating left and right with respect to the center of the shaft.

[0060] In addition to these, on one side of the fixing part, an assembling part 211 is provided which is assembled to be rotatable with respect to the center of the shaft 120, and the laser generating part 250 is provided with an aperture 251 for controlling the emission angle of the slit beam to adjust the emission angle of the slit beam.

[0061] FIG. 9 is a diagram showing the shape of a beam locus 255 formed by irradiating a floor surface 90 with a slit beam 270 according to the position of a golf club, and schematically shows a beam locus shifted from a normal irradiation marker 310 according to the posture of a user.

[0062] Since FIG. 9 schematically shows an example, it goes without saying that there may be a difference from the actual one.

[0063] As described above, the present invention has been described in detail with specific embodiments, but this is merely for specifically explaining the present invention, and the present invention is not limited thereto at all. It is obvious that those having ordinary knowledge in the art can make modifications and improvements within the technical idea of the present invention.

[0064] Any mere modification or change of the present invention belongs to the scope of the present invention, and the specific protection scope of the present invention should be clarified by the appended claims.

Explanation of Reference Numerals

[0065] 90 Floor surface 100 Head 120 Shaft 130 Grip 150 Golf ball 200 Irradiation part 210 Fixing part 211 Assembling part 250 Laser generating part 251 Aperture 255 Beam locus 260 Hinge 270 Slit beam 300 Normal irradiation trajectory 310 Normal irradiation marker

Claims

1. In a golf club for checking the state of the takeaway posture, the golf club includes a head (100), a shaft (120), and a grip (130), and further includes a slit beam irradiation unit (200) that irradiates a slit beam at a certain angle to a predetermined part of the head (100) or the shaft, the slit beam irradiation unit (200) includes a laser generation unit (250) that irradiates a slit beam (270), and irradiates the slit beam (270) emitted from the laser generation unit onto a floor surface (90) where a golf ball is placed to form a beam locus (255), when the user using the golf club is viewed from the front, when taking the takeaway posture by moving the golf club to the left side in the address posture, the position of the golf club is defined through the relative positions of the head (100) and the grip (130) of the golf club in the takeaway posture, and a shape in which the head (100) and the grip (130) are arranged at the same height and the shaft (120) of the golf club is arranged parallel to the floor surface is defined as the 12th position, when the user is viewed from the right side of the user, a 21st position in which the head (100) is located on the left side of the grip (130) (the head (100) moves to the rear side of the user), a 22nd position in which the head (100) coincides with the grip (130), a 23rd position in which the head (100) is located on the right side of the grip (130) (the head (100) moves to the front side of the user), are defined, the front side of the head (100) is defined as the toe, the rear side is defined as the heel, a straight line perpendicular to the floor surface passing through the heel is defined as the heel vertical line, and when the golf club holds the 22nd position and the user is viewed from the right side of the user, the position of the head (100) is defined according to the angle at which the head (100) is placed, assuming the heel vertical line is 0°, and when the left side direction is the "-" angle direction and the right side direction is the "+" angle direction with respect to the heel vertical line, a shape in which the heel is located on the heel vertical line and the toe is arranged at 0° to less than 30° on the right side of the heel vertical line is defined as the 32nd position, Define the position where the golf club satisfies the 12th position, the 22nd position, and the 32nd position as the normal position of the golf club, and define the beam trajectory where the slit beam (270) emitted from the laser generator (250) provided in the golf club is irradiated onto the floor surface from the normal position as the normal irradiation trajectory (300). When the beam trajectory generated by the slit beam (270) irradiated when the golf club is in a position other than the normal position is defined as an abnormal position trajectory, the normal irradiation trajectory and the abnormal position trajectory are irradiated onto different floor surfaces from each other, enabling the user to confirm the normal position of the golf club in the normal irradiation trajectory. Taking the right-handed user in the takeaway posture as a reference, when the upper direction is the +z-axis direction, the lower direction is the -z-axis direction, the left side direction is the +y-axis direction, the right side direction is the -y-axis direction, the front side direction is the +x-axis direction, and the rear side direction is the -x-axis direction, the normal irradiation trajectory (300) is irradiated parallel to the y-axis. In the takeaway posture, when the near end portion of the beam trajectory (255) formed by irradiating the floor surface (90) on which the golf ball is placed with the slit beam (270) emitted from the laser generator (250) to the laser generator is defined as the first end point (271), and the opposite end portion is defined as the second end point (272). When the head (100) is moved rearward with the golf club arranged parallel to the y-axis, the beam trajectory (255) is irradiated in a state inclined with respect to the normal irradiation trajectory (300) so as to be the 21st trajectory (255R) in which the first end point (271) moves in the -x-axis direction. When the head (100) is moved forward, the beam trajectory (255) is irradiated in a state inclined with respect to the normal irradiation trajectory (300) so as to be the 23rd trajectory (255F) in which the first end point (271) moves in the +x-axis direction. By irradiating the user to a position where the 21st trajectory (255R) and the 23rd trajectory (255F) can be confirmed in the takeaway posture, the user can confirm whether the head (100) is in front of or behind the user. A slit beam irradiation device for confirming the takeaway posture, characterized in that.

2. When looking at the user from the front of the user using the golf club, an 11th position where the head is arranged above the grip, a 13th position where the head is arranged below the grip, A slit beam irradiation device for confirming the takeaway posture according to claim 1, characterized in that it defines the above.

3. When the heel vertical line is set to 0°, and the left side direction is the "-" angular direction and the right side direction is the "+" angular direction with reference to the heel vertical line, the heel is in a state of being located on the heel vertical line, and the toe is in a 31st position arranged at -45° to less than 0° on the left side of the heel vertical line, a 33rd position where the toe is arranged at 31° to 90° on the right side of the heel vertical line, A slit beam irradiation device for confirming the takeaway posture according to claim 1, characterized in that it defines the above.

4. When looking at the user from the right side with the golf club arranged parallel to the y-axis, when rotating the golf head counterclockwise, the beam trajectory is irradiated so as to move in the +x-axis direction to become a 31st trajectory (255CC) parallel to the normal irradiation trajectory (300), When rotating the golf head clockwise, the beam trajectory is irradiated so as to move in the -x-axis direction to become a 33rd trajectory (255CW) parallel to the normal irradiation trajectory (300), and the user is irradiated at a position where the 31st trajectory and the 33rd trajectory can be confirmed in the takeaway posture. A slit beam irradiation device for confirming the takeaway posture according to claim 2 or claim 3.

5. When moving the golf head upward with the golf club arranged parallel to the y-axis, the beam trajectory is irradiated so as to become an 11th trajectory (255U) moving in the -y direction from the normal irradiation trajectory (300), When moving the golf head downward, the beam trajectory is irradiated so as to become a 13th trajectory (255D) moving in the +y direction from the normal irradiation trajectory (300), and the user is irradiated at a position where the 21st trajectory and the 13th trajectory can be confirmed in the takeaway posture. A slit beam irradiation device for confirming the takeaway posture according to claim 2 or claim 3.

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