KR20020096076A - The laser pointer for analyzing golf swing - Google Patents

Abstract

PURPOSE: A laser pointer for analyzing golf swing is provided to turn on laser beam automatically at the swing of golf club to analyze the swing by simply coupling the pointer to any clubs commonly used by users. CONSTITUTION: The laser pointer comprises a see-through window(19) to pass the laser beam; an optical glass cylinder(17) having condensing lens(17d) and semiconductor laser(17c); a control bolt(11) for Y axis to regulate directions of the cylinder(17); a laser driving circuit(16) having an automatic switch(20) and an output circuit transfer switch(14); and a battery for power supply(15). The pointer is enclosed in a case(10) attachable/removable from shaft of a golf-club by means of a fastener device(49). The automatic switch(20) is a centrifugal switch for turning the driving circuit(16) on/off by the centrifugal force generated during the swing motion.

Description

Laser pointer for golf swing analysis {THE LASER POINTER FOR ANALYZING GOLF SWING}

The present invention relates to a golf swing analysis laser pointer for use in checking and correcting a wrong swing trajectory by automatically displaying a swing trajectory of a golf club head when playing a golf swing.

Conventional technology related to the golf swing analyzer using a laser technology, the indoor golf swing practice apparatus is disclosed in Korea Patent Registration No. 10-0231257, but a golf club and a receiver for detecting and displaying the swing direction to install the swing practice on the ground As a golf swing practice device to be carried out, there is a problem that a golfer should use a practice-only club that can irradiate a laser rather than a golf club that is normally used, and cannot change sensitivity according to various clubs, and a laser generation switch There was also the inconvenience of having to turn it on and off manually.

In addition, although the indoor and outdoor practice golf club is disclosed in Korean Patent Application Publication No. 1999-0068804, this also can not be applied in addition to the dedicated golf training club, it is not possible to practice the sensitivity change according to various golf clubs, laser generation switch also manual Inconvenience to use as a switch, there is also a problem that the laser beam also draws along the ground or wall without drawing a constant trajectory as in the present invention, the practice effect is inferior.

The present invention is to solve the above problems and can automatically turn on the laser beam when swinging, and to provide a golf swing analysis laser pointer that can be used by simply connecting to various golf clubs used by the golfer for everyday use.

1 is a block diagram of a laser pointer of the present invention

2 is a block diagram of a centrifugal force switch

Figure 3 is an exemplary embodiment of a laser beam driving circuit composed of a centrifugal force switch

4 is an exemplary view of fixing a laser pointer to a club shaft.

5 is an exemplary view of adjusting the laser beam X axis direction.

6 is an illustration of laser beam Y-axis direction adjustment

Figure 7 is an illustration of the use of the laser pointer of the present invention

8 is a principle diagram of judging a swing track according to the present invention.

Figure 9 is an illustration of a laser pointer transmission window of the present invention

10 is an exemplary embodiment of a laser beam driving circuit by a load sensor

11 is a laser pointer circuit diagram of the present invention.

※ Detailed description of reference numerals

10: Case 11: Y-axis adjusting screw

12: barrel fixing spring 13: laser beam

14: output circuit changeover switch 15: battery

16: drive circuit

17: optical barrel 17a: barrel stand

17b: barrel adjuster 17c: semiconductor laser

17d: condenser lens

18: holder 19: transmission window

20: automatic switch 21: contact

22: switch case 23: metal weight

24: switch spring 25: contact gap adjusting screw

26: centrifugal force switch

30: high output circuit 31: low output circuit

40: shaft 41: left detachable ring

42: right detachable ring 43: rubber support

44: rotation pin 45: detachable handle

46: removable clasp 47: loop

49: fixing unit

50: head 70: driver

71: iron 72: secondary marker

73: grip 74: ironhead

80: golf ball 81: target line

82: normal line 83: hook line

84: slice line 90: hologram element

91: cylindrical lens 93: flat glass

101: load sensor 110: unstable multivibrator

111: Darlington circuit 200: laser pointer

The golf swing analysis laser pointer 200 of the present invention is used by being attached to the lower portion of the grip of the club shaft as shown in Fig. 7, but the laser beam is directed to the club head.

Hereinafter, the configuration of the laser pointer of the present invention will be described with reference to FIG.

The laser pointer of the present invention includes an optical shaft 17 provided with a transmission window 19 through which a laser beam passes, a condenser lens 17d and a semiconductor laser 17c, and a Y-axis adjusting screw for adjusting the direction of the optical tube. 11), a laser drive circuit 16 with an automatic switch 20, an output circuit changeover switch 14, and a power supply battery 15, and the laser pointer case 10 includes a fixing unit 49 The golf club shaft 40 can be attached to and detached from the golf club shaft 40.

The detailed operation principle of each component is as follows.

First of all, the semiconductor laser 17c used in the present invention uses a high-power for continuous pulse type with an output of about 30 mW so that the laser beam can be clearly distinguished even in bright outdoor areas. It is preferable to use a red semiconductor laser having a wavelength of 650 nm because the laser having a wavelength and emitting green or blue light is expensive.

Referring to the automatic switch 20 of the configuration of the present invention.

The automatic switch is configured as a centrifugal force switch 26 or a load sensor 101 using gravity acceleration due to centrifugal force generated during swing.

First, the operation principle of the laser beam driving circuit 16 composed of the centrifugal force switch 26 and the centrifugal force switch will be described with reference to FIGS. 2 and 3.

In the centrifugal force switch, the metal weight 23 moves downward by the centrifugal force generated when the golf club swings, and is connected to the contact 21.

For example, if the metal weight is made of copper and the length is 1 cm and the diameter is 5 mm, the density of copper is 9 g / cm ^3, so the weight is 1.8 g. On the other hand, if the arm length is 1 m and the mounting position of the laser pointer is 20 cm away from the hand, the rotation radius r at the swing becomes 1.2 m.

Also, the time taken to move ± 90 °, ie, 180 °, before and after the striking is about 0.2 seconds for an amateur golfer, so the rotational acceleration ω is 180 degrees / 0.2 seconds = 15.7 radian / sec. 180 degrees is 3.14 radians and the acceleration by centrifugal force is rω ^{2, which} is 296 m / sec ² . That is, it is about 30 times the gravity acceleration of 9.8 m / sec ² , and the weight of 1.8 g is changed to the weight of 54 g.

Therefore, when the coefficient of the switch spring is 50 g / mm, the moving distance of the metal weight during swinging is about 1 mm, so setting the distance between the contact point and the metal weight to 1 mm turns the contact on the swinging state.

This setting is made by the contact spacing adjusting screw 25.

When the swing operation is completed, it is restored to its original position by the contracting force of the switch spring 24, the laser driving circuit 16 is cut off and the laser beam is turned off.

When the centrifugal force switch 26 is configured, it is possible to solve the inconvenience of manually turning on / off the power when using it, and by using the contact spacing adjusting screw 25 to adjust the spacing of the contacts according to the difference in individual swing strength. By adjusting, many golfers may use it alternately.

Next, a case of configuring the automatic switch with the load sensor 101 will be described with reference to FIG.

The centrifugal force switch is an ON / OFF switch, which emits only a pulsed high power laser beam, but when configured as a load sensor, different sensor voltages are output according to the load detected by the load sensor according to the gravity acceleration during the swing. By varying the output form of the laser beam according to the output Volt, the striker can recognize and correct the swing speed.

If the swing is slow based on the swing at the normal speed, the laser beam is turned off (102). If the swing is performed at a high speed based on the normal swing, the continuous high power beam (104) is emitted. As the beam is emitted, there is also the effect of a switch that automatically turns off the laser beam, along with the effect of practicing to always swing at a constant speed.

Next, with reference to Figure 4 will be described the configuration of the laser pointer fixing unit 49 of the present invention.

Not only protects the shaft of the golf club, but also prevents the laser pointer from collimating due to the impact caused by the impact of the golf ball, and is sufficiently thick and resilient to support the shaft firmly. 43 are attached to the lower portion of the fixing arm 18 and the inner surface portions of the left and right detachable rings 41 and 42, respectively.

In addition, one end of the left and right detachable rings (41, 42) is coupled to each other by the fixing rod 18 and the rotation pin 44, the opposite end to the hook 47 and the removable clasp 46 for fastening to each other There is, is firmly fixed by the removable handle 45.

Fixing unit 49 of the present invention is preferably to be applied to the diameter of the shaft 14 ± 1.5mm, but is not limited to the above-mentioned diameter, the number of rings as the thickness of the shaft is changed It can also be applied by changing the diameter of the left or right detachable ring.

Next, the X and Y axis adjusting method of the laser beam will be described with reference to FIGS. 5 and 6.

In order to position the laser beam 13 in the center of the club head 50 when the laser pointer of the present invention is fastened to the golf club, the change of the X axis is performed by fixing the fixing unit 49 to the golf club.

The Y-axis adjustment is performed by turning the Y-axis adjustment screw 11 in the forward or reverse direction as shown in Figs. 6B and 6C.

On the other hand, when changing the X, Y optical axis, the output circuit switching switch 14 is connected to the low output circuit 31 so that the laser beam 13 is continuously generated, and then the optical axis is adjusted while watching the laser beam. At this time, the laser beam is reflected from the club head to drive the laser with a low power of 1mW or less so that it is not dangerous to the eyes.

After the laser beam optical axis adjustment is completed, the output circuit changeover switch 14 is switched to the high output circuit 30. However, the high power circuit does not operate immediately, and the high power laser beam is automatically generated only when the exerciser swings and the auto switch 20 is operated and connected.

Next, the transmission window 19 will be described with reference to FIG.

The shape of the laser beam emitted through the transmission window of the laser pointer is different depending on the type of transmission window.

In general, it may be implanted into a point shape using a flat glass 93 or a flat plastic of transparent material, or may be implanted into a '-' shape 92 by using a hologram element 90 or a cylindrical lens 91. have. Since the '-' shaped laser beam is horizontally implanted with the X-direction optical axis, the X-direction optical axis can be easily adjusted, and the laser beam can continuously irradiate the club head even if the shaft is bent during swinging.

Next, the driving principle of the laser pointer 200 of the present invention will be described with reference to the circuit diagram of FIG.

When 1 and 3 of SW1, the output circuit selector switch 14, are connected, the collector of transistor Q2 outputs an unstable square wave signal A. This signal A is connected to the base of transistor Q3, and the inverted voltage is output to the collector, and the potential of the point B is modulated high and low.

When the B point becomes low, the base potential of transistor Q4 is also lowered, which turns off until the cascade transistor Q5, so that no current flows through the laser diode LD.

When the point B becomes high, the base potential of the transistor Q4 rises, and the transistor Q5 connected to the Darlington circuit 111 becomes conductive. Therefore, when a current flows through the laser diode LD, a current proportional to the amount of light flows in the optically coupled photodiode PD, and the potential at the point B is slightly lowered to lower the current of the laser diode LD. The amount of light is automatically adjusted so as not to be output.

Therefore, when point B becomes high, a fixed amount of light is emitted.

The laser beam 13 of square wave output is emitted from the laser diode LD according to the point A signal of the square wave shape as described above. However, 4 and 5 of the automatic switch SW2 by the swing motion are connected and the current flows.

When 2 and 3 of the output circuit changeover switch 14 SW1 are connected, the emitter of Q2 is short-circuited, so the unstable multivibrator 110 stops operating. The A point remains high and becomes a partial voltage with the resistor R5, so that the current in the base of transistor Q3 decreases somewhat.

Therefore, the potential of the point B is lowered, and the current flowing through the laser diode LD is also lowered, thereby lowering the emission amount. At this time, the X and Y optical axes can be changed by the low power laser beam.

Next, a swing posture correcting method using the laser pointer of the present invention will be described with reference to FIG.

When swinging using the golf club equipped with the laser pointer of the present invention, as shown in Figure 8, the swing line is seen by the latent phenomenon.

This swing trajectory can be analyzed and corrected to swing to the normal line.

In addition, the eye keeps on the ground to see his swing trajectory during the swing to prevent the head-up phenomenon of lifting the head to see where the ball goes.

Hereinafter, a method of using the laser pointer of the present invention will be described with reference to the following examples, but the examples do not limit the scope of the present invention.

Example 1

Illustrating a method of fastening the laser pointer 200 of the present invention to a golf club as follows.

① The output circuit changeover switch 14 was switched to the low output circuit 31 to emit light at a low output of 1 mW.

(2) A long driver 70 was prepared as shown in Fig. 7A. However, in the case of the head of the black system, a white auxiliary marker 72 was attached to the center of the upper surface of the head 50 so that the laser beam was well reflected.

③ Position the transmission window 19 of the laser pointer horizontally with the shaft below the grip 73 of the driver 70 to face the head 50, and then the laser beam is in the X-axis direction with the auxiliary marker 72. After fitting and attaching the detachable clasp 46 to the ring 47, the detachable handle 45 was tightened and fastened to the shaft.

④ The Y-axis adjusting screw 11 was rotated from side to side to adjust the laser beam at the center of the auxiliary marker.

⑤ After switching the output circuit selector switch 14 to the high output circuit 30, the swing was performed.

⑥ The swing trajectory appeared at the position where the laser beam passed during the swing, and the swing to the hook line 83 and the slice line 84 could be corrected to the normal line 82 as shown in FIG. By keeping an eye on the ground where the golf ball is located to see the track, it was possible to prevent the head-up phenomenon of lifting the head to see where the ball would go in the swing.

Example 2

① The output circuit changeover switch 14 was switched to the low output circuit 31 to emit light at a low output of 1 mW.

② Short iron 71 was prepared as shown in FIG.

③ Position the transmission window 19 of the laser pointer horizontally with the shaft to face the iron head 74 below the grip of the iron, and then make the laser beam coincide with the center of the iron in the X-axis direction, and the ring 47 After attaching and detaching the clasp 46, the handle 45 for attaching and detaching was fastened to the shaft firmly.

④ The laser beam was well reflected even without the auxiliary marker.

⑤ The Y-axis adjusting screw 11 was rotated to the left and right to adjust the laser beam to be located at the center of the iron head 74.

⑥ The output circuit selector switch 14 was switched to the high output circuit 30 and then swinged.

(7) The same effect as (6) in Example 1 was obtained.

It is compact and has a light and detachable fixing device, so it can be easily applied to existing golf clubs. The laser beam is automatically turned on only when swinging by a centrifugal force switch. There is little effect.

In addition, the optical axis can be arbitrarily changed by the Y-axis adjusting screw, so that it can be easily attached to any type of golf club and used after adjustment.

Claims (5)

A transmission window 19 through which the laser beam passes, an optical tube 17 provided with a condenser lens 17d and a semiconductor laser 17c, a Y-axis adjusting screw 11 for adjusting the direction of the optical tube, and an automatic switch 20, the laser drive circuit 16 to which the output circuit changeover switch 14 is attached, and the power supply battery 15, and the laser pointer case 10 is attached to the detachable fixing unit 49. Laser pointer for golf swing analysis that can be attached to and detached from the golf club shaft (40). The method of claim 1, wherein the automatic switch 20 is a golf swing analysis laser, characterized in that the centrifugal force switch 26 having a function of turning on / off the laser drive circuit 16 by the centrifugal force generated during the golf swing operation. Pointer. The method of claim 1, wherein the automatic switch 20 is a golf swing analysis laser pointer, characterized in that the load sensor 101 for outputting the sensor voltage converted in accordance with the centrifugal force generated during the golf swing operation. The laser beam is continuously generated when the output circuit selector switch 14 is connected to the low output circuit 31. The brightness of the laser beam is low output light of 0.5 to 1 mW, and the high output circuit 30 ) Is connected by the centrifugal force generated during the swing, and when connected, the laser pointer for the golf swing analysis, characterized in that a high output light of continuous pulse form of 20 ~ 40mW is generated. The laser pointer for a golf swing analysis according to claim 1, wherein the transmission window (19) is a hologram element (90) or a cylindrical lens (91).