JP2010220631A - Golf club for practice having light guide hole and optical sensor in face part, and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an improved golf club for ball hitting practice by solving the problems wherein although there are many desires to know the ball hitting position in a face of the head of the golf club, there is a little technical disclosure to be put to practical use, and a method using a high speed camera or a magnetic device is not simple, and on the other hand, a method using sticking of pressure sensitive discoloring paper has the disadvantage that it is necessary to re-paper one by one. <P>SOLUTION: In this club for practice, holes are provided in an equivalent number of hole positions 204 of the face surface 203, light guiding raw material fills in the holes, a photo sensor is provided in each of the interiors, further a shock sensor is provided. When an impact more than fixed is sensed, the photo sensor is driven, and substantially accurate hitting position is known according to a defined computational expression from the position and number of extinction holes. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a new golf club for practice, in particular, a golf club for practice that has both a light hole and a light sensor (also referred to as a sensor) that can correctly know the “striking position” at the face of the club head, It relates to the manufacturing method.

Since ancient times, as a golf club for practice (for practice), the ball hitting position, that is, where the ball hits the ball head (also called the ball) contact surface (also called the face or face), the impact stress, The desire to know the striking angle was a serious concern for practitioners and beginners (or poor people).

Therefore, some kind of sensor (sensor = abstract noun “sensing element”), if expressed, other abstract noun transducers (elements that convert physical quantities into electrical signals, in a broad sense one energy form to another energy) It has been in the conversation as a wishful expression exchanged by golf friends for a long time.

In other words, these were old desires. Therefore, it is not an invention because it is a desire and not an invention simply by not clarifying the specific means and only abstractly a golf club with a sensor and a display device. However, since the specific technique and method for actualizing this desire are not known at all, although there are many proposals as aspiration, it has not been put into practical use for a long time.

Not only the desire, but also how and where the sensors with proven functions are arranged, and what signals are processed so that data (also referred to as data) can be obtained at any timing, and how they are processed However, the disclosure of contents based on specific experiments such as what display form / appearance, where, how, and how it was processed correctly by experiments was scarce.

On the other hand, taking pictures with a high-speed camera is expensive and expensive, and requires a bright light in relation to the sensitivity of each frame with a short shutter time. In addition, the shot must be taken from the front side where the hit ball flies, and since the ball flies from the front, it is dangerous for the photographer, and there were serious defects including protection not to break the camera.

As far as the present inventor is aware, what has been realized is a paper on the market in which pressure-sensitive color-changing paper is pasted on the head and the ball is hit by the color change of the paper. This has serious defects such as repeated troublesomeness that paper must be applied to and peeled from the face of the club, and the feeling of hitting by the paper is different.

In the past, the Evans patent group (Patent Documents 1, 2, and 3) has an accelerometer attached to a golf club head, a bending stress meter and a strain gauge attached to a shaft, and a monitor (display device: The proposal to display on a specific example: oscilloscope) is shown. In addition, although an attempt to display by comparing them in a continuous swing is also shown, it has not been successfully displayed as to which part of the face has been hit. In addition, these patents have already been cited and referred to a number of earlier patents, and it is recognized that the above-mentioned desires have long existed.

In Hammond's US patent group (represented in Patent Document 4), an accelerometer is placed in three directions perpendicular to the head, and the hit point data signal and the actual signal are compared and hit anywhere on the face. However, it is not shown in detail, and the ball has strength, rotation, ball type / manufacturer difference, wetness difference, dirt difference, temperature difference, etc. Is not enough to be considered.

Pharma's US patent (Patent Document 5) describes a liquid crystal display from a graph showing the relationship between the acceleration attenuation and the preliminary test result of the flight distance by the impact value obtained through one acceleration sensor (also a transducer). (LCD) and light-emitting diodes (LEDs) have been proposed, but the hitting position display has not been successful.

Asano et al. (Patent Document 6) describes a training machine that hits a sweet spot, puts a special light source outside, puts something like a rubber plate with a hole instead of a ball, A face with a hole in the center of the sweet spot of the club, a light receiving element is provided on the back (inside = inside of the head), and only when swinging correctly passes through the hole in the rubber plate, and special light reaches the light receiving element. Therefore, a concept has been proposed in which a device incorporates a device both inside and outside that the signal is known by means of transmitting the result (sound, light, etc.).

Also, it is said that the reverse is also true, and there is a light emitting element in the face, and when the ball hits correctly, it reaches the external light receiving element, so it can be known that it has shaken correctly. Is beyond the understanding of the reader. On the golf course, such an external device (device) has a serious defect that it cannot be incorporated.

In Igarashi's US Patent (Patent Document 7), it is possible to determine an effective striking range such as providing a cavity in a golf club head, filling it with urethane foam, and displaying it in a place such as a CRT (CRT) using a transducer. Although it has been proposed, it is a sweet spot in such a modified product, and it can be considered that it is far from that of a product that is not a modified product, and the true hitting position specifying means has not been clarified.

The Dekai patent (Patent Document 8) discloses one means for determining the position where the sound is generated from the sound in the structure. It has not succeeded in specifying the hitting position by sound in the club.

In Yasuda et al. (Patent Document 9), a magnetic sensor is provided under a place where a ball is set in a place where a shooting practice is performed, and a signal generated by the movement of metal due to a swing is analyzed, and the head speed is analyzed. A method for measuring a swing locus, a face angle, and the like has been proposed. This requires a mechanism under the hit ball to be hit, depends on many different types of clubs, makes it difficult to clarify each hit point position data, and the installation of such a mechanism is too large and not easy. It cannot be regarded as having succeeded in specifying the hit point position. It is outside the club, not inside the club. If you walk out of the course, you can no longer measure.

In the US patent (Patent Document 10) of Kustanovich, a method is proposed in which the selective conductive electrode portion and the pressure-sensitive impedance measuring portion are arranged concentrically to determine the force and position of impact. Although it is said that it can be used for pitcher pitching practice and measurements in sports such as golf, the impact when hitting golf is surprisingly high pressure, and where it is placed, it is durable when placed outside the head There were serious defects such as low properties, and if it was inside, the impact could be considered blurred due to the face metal plate. In particular, it has not succeeded in specifying the hit point position.

Sakamoto's patent application (Patent Document 11) shows a concept in which a pressure sensor is attached to a golf club, and information about the ball is displayed in a place / part as appropriate by a microcomputer. In particular, it is described that the impact force value is measured and displayed by a pressure sensor fixed to the lower part of the shaft. This is similar to the aforementioned Evans US patent, and the hitting position is not successfully determined.

Putt's U.S. Patent (Patent Document 12) has a putter that is removable (embedded in wood) and a transducer placed on the face to know where it hits the position in the front-rear direction. However, it has a serious flaw that it cannot withstand repeated high impact values (eg 1 ton / square centimeter) when directly touched by the ball. Further, the face value is only front and back (toe side or heel side), and there is a defect that the vertical direction of the face surface is unknown.

In Ishibashi's utility model (Patent Document 13), there is a proposal that if a plurality of optical sensors are arranged and a light emitting device is provided for each of them, it is possible to determine where the light hit because it shines. It may be difficult to display at the same place, which may be difficult, inferior in durability, or heavier. In addition, it is not clear how to perform the process from display to display in detail.

The Wilhelm patent (Patent Document 14) discloses a golf swing evaluation system that displays the maximum hitting force and hitting position on a display unit, and there is little concrete content for achieving the purpose, and the expression of a claim like a wish Have taken. As a specific example, the arrangement of a piezo electric sensor is disclosed, and a means for analyzing from the relationship between voltage and time is also disclosed. It has also been disclosed to provide a display portion on the grip portion like the wristwatch at the other end of the grip. From the viewpoint of durability and accuracy, it is not considered that the hitting position display has been achieved yet.

Higashikubo et al. (Patent Documents 15 and 16) show that a face has a hole, an optical fiber is bundled, passed through a shaft, and analyzed by a discrimination unit. Because it is an optical fiber, (1) it becomes very heavy, and (2) the optical fiber is fragile, and it is easy to cut because of repeated impacts. (3) It is extremely difficult or impossible to make a bundle of fibers and make it a little. Even if it is remodeled thickly, it takes time and effort, (4) it becomes distorted when bundled, accuracy becomes worse, (5) there is a space limitation on the shaft part, and it is practically impossible to make a large number of shafts. It was.

In Watanabe's device (Patent Document 17), the above-mentioned desire is described, and more specifically, there are “contacts” extending from the outer surface of the golf club to the inner surface, and a number of (grid-like shapes) provided on the inner surface. There is a disclosure that a contact unit (rubber) is provided and the contact is pushed and the contact is energized when the ball hits, the position is detected, and the result is displayed on the display device. Although the child operates, it is unclear how the calculation, that is, how it is correctly displayed, is not concrete, and there remains a problem with durability.

In the Gedni patent (Patent Document 18), the basic concept of the above Sakamoto patent and the Wilhelm patent are used to analyze using the peak value of the impact force or the extension force. It is described that the impact force is detected by a plurality of sensors provided on the head, and the impact force and the moving direction of the sphere (corresponding to a slice or a hook) are displayed. It is not clear about the location of the hit point.

The Marsh patent (Patent Document 19) describes that a piezoelectric film composed of a plurality of sensor elements is bonded to a face and that the sensor elements are made into an orthogonal array, an eccentric circular pattern, or the like.

In the patent of Suzuki et al. (Patent Document 20), a plurality of detecting means such as an impact sensor for detecting the hit position of the ball is provided on the head, and the display means by a liquid crystal display method, a lighting display method or the like for displaying the hit position is provided in the shaft portion However, this also has the same problem as that of Watanabe.

The family's patent (Patent Document 21) describes a technique that makes use of the feature of concentrically arranging sensors in the position specification by sound.

USP 3,270,564 (1964-5-18 application 1966.9, 6 published by Evans) USP 3,792,863 (1972-5-30 application published 1974.19: Evans) USP 3,806,131 (1972-3-29 application published 1974.4.23: Evans)

USP 3,945,646 (1974-12-23 application 1976.23 published by Hammond) USP 4,088,324 (1976-12-6 application published 1978.5.9: Pharma) JP-A-56-31766 (1979.8.24 application published 1981.1.31: Asano)

USP 4,523,759 (1983-5-11 application 1985.6.18 published: Igarashi) JP 59-231462 (1983-6-15 application published on 1984.12.16: Dekai) USP 4,615,526 (1985-10-25 application 1986.10.7 published by Yasuda et al.)

USP 4,659,090 (1985-8-21 application published 1987.4.21: Kustanovich) JP-A 62-192186 (1986-2-17 application published 1987.8.22: Sakamoto et al.)

USP 4,898,389 (1987-9-8 application published 1990.2.6: put) Reality 6-11027 (1988.8.820 application published 1990.2.27: Ishibashi) USP 4,991,850 (1988-12-22 application published on 1999.12.12: Wilhelm)

Japanese Patent Laid-Open No. 3-146079 (1989-11-2 application, 1991.6.21 published, Higashikubo et al.) JP-A-3-146080 (1989-11-2 application, 1991.6.21 published, Higashikubo et al.) 4-92273 (1990-12-27 application 1992.8.11 publication: Watanabe et al.)

Japanese Patent Application Laid-Open No. 2005-228561

JP 05-115586 (1992-4-20 application: Gedni et al.)
JP-A-10-118238 (Application for 1997-9-9: Marsh) JP 2000-84133 (1998-9-9 application: Suzuki et al.)

JP 2004-81407 (2002-8-26 application: family etc. )

However, the conventional technology is an abstract noun “sensor” that everyone can easily think of, and “a list of desires” of ordinary people who want to measure by attaching a transducer. There is no concrete means to solve, none of the "completed technology" that can withstand practical use is disclosed, practically correct hitting location has not been successfully identified, unexperienced, heavy The system is not easy (complex), in particular it cannot withstand impacts when hitting (durability), it is fragile, the judgment method is ambiguous, it does not fit in the head, etc. There was a serious drawback that it was difficult to put into practical use.

For example, the former says, “I want to go to the moon by vehicle (= spacecraft)” or “I want to clean my room when I ’m absent from the robot (= automatic traveling vacuum cleaner)”. Requests for patent application even though specific means are unresolved, such as `` space ship with function to go to the moon '' `` automatic vacuum cleaner that cleans the room when it does not detect human beings for a certain period of time '' even though it is only a list of wishes There are many things that are equal to items that have been filed.

For golf clubs, the details of the embodiments embodied are scarce, and it cannot be regarded as having succeeded in locating concretely, or found in the market. In addition, because there are many “superior concept” expressions of solution means, if the rights cannot be obtained with patents etc., imitations will appear immediately even if research is carried out, so research investment can be considered wasteful. As a result, the development and advancement of realization technology has been hindered, and the bad aspects of the patent application system have emerged.

Although specific achievement means / techniques must be patented, claims of aspirational expression or abstract expression are described, resulting in many adverse effects on technical progress. In particular, the hitting position specifying means on the golf club face was a desire means.

In addition, it can be said that there has been any serious defect such as difficulty in implementation, determination of hitting position, or breakage immediately even if it is not on the market.

A piezoelectric element (transducer) called PVDF (polyvinylidene fluoride) has a hard metal plate on the surface of the head hitting part (presupposed) and moves in the same way, so that the electromotive force is small, fragile or deformed. There was a drawback that it would. In addition, since there is no important description of supporting from the back with a hard material, it goes without saying that the electromotive force is small and the accuracy of position specification is low.

An object of the present invention is to specifically provide a practical technique that can be industrialized without the above-mentioned various defects. It is another object of the present invention to provide means for simultaneously satisfying many trade-off problems at the same time while improving the drawback that the greatest problem of mutual contradiction between weight reduction and accuracy has not yet been solved. This type of trade-off problem has not been clarified or solved in the known literature. Therefore, an invention that can be put on the market must be provided.

The main problems to be solved are as follows, and other objects will be clarified in the detailed description. That is, it is to improve the unsatisfied part of the conventional proposal so as to meet the reality dramatically.
(1) The hit position is displayed substantially correctly, and the proof / confirmation is obtained. (2) The moment of hitting is captured (not the data when swinging up or after hitting).
(3) There is a true disclosure of how the hitting position is determined by means or calculation.
(4) Light weight (light weight, power supply included)
▲ 5 ▼ Can be small (contains in the head)

(6) Withstand repeated impacts (durability)
(7) The position can be displayed correctly within the range of practical accuracy (accuracy).
(8) Low power consumption (electric power)
(9) Not expensive for production (industrial feasibility, stability, reproducibility, economy)
▲ 10 ▼ Do not put a burden on the user in operation (easy care, easy viewing, easy handling, resetability, quick response)

▲ 11 ▼ Good workmanship, at least not unsightly (allowing for higher sensitivity perspective)
(12) The number of detection units is small (13) No special device is required on the outside, that is, the ground side, (14) The result is easy to see,
▲ 15 ▼ Can save electricity

(16) The missed results can be restored.
The purpose is to solve such comprehensive items in a well-balanced manner. In particular, it is to provide means for answering problems that can be industrially implemented.

  The gist of the present invention is as follows. That is,

Three or more holes are provided in the hitting face face of the golf club, and an optical sensor is provided on the back (inside), and a sensor part (impact sensor or twist) that recognizes that it has been hit (impact). Sensor), and each light sensor corresponding to a plurality of holes in which light from the outside is attenuated by the striking ball (although the time when the ball is in contact with the face is considered to be within a range of about 500 microseconds) The microcomputer section with a calculation function software circuit that substantially considers that the ball hits the “center of gravity” defined in the present invention (using the formula described later), and the approximate outer shape of the face and the hitting position at the same time. A golf club for practicing hitting position detection, characterized in that a display unit for displaying and a power source unit are attached at the same time.

Here, a physical quantity called light is a sensor (or sensor), that is, a transducer, which is equivalent to another physical quantity called impact or twist (including deflection) that is converted into an electrical quantity. It must not be overlooked that it must be measured within a short time from the moment it starts to hit and until it leaves.

If it is not the moment that the ball is hitting the face, then just before and after hitting, just picking up a lot of meaningless data and there is no data value at all. In general, a dent, such as a dent, is a hole, and when it penetrates small, it can be regarded as being distinguished from a hole. However, here, a hole or a hole is used regardless of the diameter, and both are used. In particular, even if the hole is filled with a transparent resin or the like, it is called a hole.

Here, the “center of gravity” calculation software for determining the hitting position of the microcomputer is the position of a plurality of n (n = 1, 2, 3, 4...) Holes where light is attenuated with respect to the orthogonal axes x and y. as the _(x n, _{y m),} each weighting, centroid position as a homogeneous _(x g, _{y g)} is
(X _g , y _g ) = ((x ₁ + x ₂ + x ₃ ... + X _n ) / n, (y ₁ + y ₂ + y ₃ ... + Y _n ) / n)
Therefore, it is assumed that a ball is present at the center of gravity after the calculation process, and the display is processed and displayed. In spite of such a disposition process, it was unexpected that many experiments of the present inventor were able to display correctly.

The moment of hitting a golf ball is generally considered to be a professional-grade high pressure of 1 ton per square centimeter. Of course, the time it takes for the ball to hit the face again and leave the ball again depends on how you hit it. Although it depends, it is about 500 microseconds. In the present invention, this point is particularly emphasized and used skillfully.

In order to experiment with these, the inventors first created a striking machine (striking robot). According to it, there was only a machine as expected, and the repetitive performance not different from 1 to 2 mm was confirmed with respect to the hitting position. A commercially available impact verification sheet was stretched to check the discoloration position, and it was confirmed again and again, and the impact verification sheet (which can be measured by passing faint light even with paper, but the hole part is cut through) The color change mark indicating the same position was reproduced at the same position even after pasting. On the other hand, although there are distorted balls even though they are made with a machine, it is not stated that they all flew in the same direction even at the same hitting position.

In relation to the present invention, the hitting robot, a commercially available impact hammer, and a hammer-like product with a ball on the head, and the same place was hit and verified. It was surprising to have correctly detected the street results as they were hit without exception within the range. Here, the method called “centroid” calculation method (also called operation) has proved to be sufficiently correct. The method is as shown in the above calculation formula.

Since the load must be able to withstand these loads and the measurement must be completed in a short time, the sensing unit must cope with both. Many published sensors are quite unclear as to whether they can withstand the speed of response and the instantaneous pressure. (It may be a slow and slow sensor.) It can be said that.

Moreover, even if the impact was too great, whether it would work as expected could not be expected or predicted at all unless it was implemented. The present invention is based on the results of repeated experiments. Such a method of obtaining from the center of gravity is not a true “center of gravity” because it is not “weight” because light is only blocked at the time of impact and is different from that having mass. Although there may be an idea that the expression “center of gravity” is not appropriate, the method is very similar, so the formal expression “center of gravity” is used here.

Since the holes provided in the face are clogged with dirt and dust, it is preferable that the holes are filled with a transparent polymer through which a certain amount of light passes, a glass analog, a rubber analog (biscoelastic material), or the like. Due to the surprising impact pressure, it is not preferable to make many holes in the face surface. However, in order to correctly specify the striking position, usually three or more places are necessary. If the number of holes is increased, the determination accuracy is improved, but the face surface is weakened. Sound and resilience will also change. It becomes a contradictory matter. The limit of accuracy will be clarified in the following description.

The size of the hole and the light transmission are in a contradictory relationship. If the hole is small, the light passage performance is weak. Conversely, intensity and sound change too much. Other items and solutions to be explained such as solutions will be supplemented sequentially.

With respect to the second claim, the present invention relates to a “manufacturing method” for smoothly carrying out the first invention. In other words, three or more holes are provided in the hitting face face of the golf club, an optical sensor connected to the hole is provided on the back part, and a sensor part (impact sensor or a sensor of torsion or deflection) is provided that is operated when hit or impacted. A microcomputer with calculation function software is provided which is substantially regarded as hitting a ball by hitting the ball (the center of gravity of a plurality of holes which has been dimmed and therefore dimmed) (according to the position calculation method defined later). A method for manufacturing a practice golf club capable of detecting a striking position, comprising a method of providing a display unit for displaying an approximate outer shape of a face part and a striking position, and simultaneously attaching a power source. It is preferable to produce.

Here, the “center-of-gravity” calculation function software sets the position of a plurality of n holes (n = 1, 2, 3, 4,...) Whose light amount has decreased by a certain amount or more with respect to the orthogonal axes x and y (x _n , y _m ), each weight is uniform and the center of gravity (x _g , y _g ) is
_{(X g, y g) =} ((x 1 + x 2 + x 3 ··· + x n) / n, (y 1 + y 2 + y 3 ··· + y n) / n)
Therefore, the calculation is performed.

The present invention provides an impact sensor unit that detects an initial vibration (impact) of an optical face surface and detects an impact start time point, and a circuit unit by which the optical sensor starts measurement driving is provided. This is a golf club for position detection practice. The setting at the time when the optical sensor starts measurement driving is an extremely important matter in the present invention.

Since the optical measurement possible time is roughly within 500 microseconds when the sphere is touching the face, that is, it must be measured while touching, the detection by the impact sensor requires a very fast response. The key here is that the impact sensor must be activated as soon as the impact is received (eg, 100 microseconds after impact) and the light sensor must be activated within the time it takes for the ball to leave the face. It is too late for the “light sensor” to start measuring after the ball has been separated.

Fortunately, the impact sensor used in this experiment has been found and confirmed to react at 100 microseconds or less, so using this method is an epoch-making method. In other words, when the ball hits the face, the light sensor was driven to find the surprisingly valuable fact that light dimming was possible, and using that fact, the face hits the ball. It can be measured at the moment when it is, and finally the dimming of the hole concealed by the ball can be captured, and from the information, the target hitting center position can be measured, and finally the target hitting point position is captured I succeeded.

It is necessary to select an impact sensor (in a broad sense) that reacts quickly and an optical sensor, and the selection thereof is the secret. The point of impact includes detecting with an impact sensor (at least one). The impact sensor may be a sensor that detects vibration (impact) of the face surface, or a sensor that detects torsion or deflection of the shaft axis. Here, all are referred to as impact sensors.

There are numerous types of impact sensors in a broad sense. However, to the best of the inventors' knowledge, many commercially available sensors have little or no reliable description of response speed, or poorly describe the response speed at the microsecond level. However, after knowing the present invention, an affiliate can measure, compare and select them for this purpose.

In addition, in a golf club having a photosensor portion, a microcomputer, a display portion, and a power source portion on the face portion of the golf club having a hole and a back portion of the face portion, a hit is made on a figure or an image corresponding to the face portion of the golf club. The center of the ball is displayed as a “•” dot, a “ten” cross, a “×” x, or a “○”, “●”, “◎” circle. It is a practice club capable of detecting a striking position, characterized in that at least one selected from among them is illuminated and used as a display unit.

A combination of these may also be used. Since it is a small display part that does not get in the way near the grip of the shaft, it must be made very easy to understand, and it was found to be extremely important.

In the hitting position display, a club for practice capable of detecting the hitting position is provided with a display unit provided with a function of “flashing” in addition to the above display or code. It was also found that the flashing changed dramatically in spite of the small display area. In addition, when the color is red (when color is displayed), the discrimination performance is easy to understand (easy to see) regardless of whether it is flashing or not.

In the present invention, the striking face face has at least four holes, and the holes are arranged substantially at the grid or in the vicinity thereof. For clubs. The arrangement of the light holes is usually concentric (ripple) with the center of the sweet spot as the starting point. However, the method is based on the three-dimensional congestion or limit of the sensor (space limit), difficulty in manufacturing, position There are fatal defects such as difficulty in judgment calculation.

In the present invention, it has been found through experiments that sufficient determination accuracy can be obtained with a small number of sensor units. It is based on knowledge that only the person who implemented it knows.

An example of the arrangement is shown in FIG. 101 is the outer shape of the club head, 102 is the lower end of the club shaft, 103 is the face surface, 104 (round portion) indicates the arrangement of the holes provided in the face, and 105 is the hole arrangement. For this reason, the dotted dotted line 105 is provided for the purpose of explanation and explanation. In the experiment described later, the grid interval (hereinafter sometimes referred to as 2D) is 16 mm as an example. For the explanation of “Teleko” described later, the dotted lines are provided at a half (D) interval.

In the example of FIG. 1, since the actual face surface is not a square, the second row from the top can be additionally arranged one hole at the left and right, and 16 + 2 = 18 holes.
For the determination of the hit point position, the calculation result is set as the center of the hit point in accordance with the expression “center of gravity” of the unique expression method in the present invention.

The number of holes for an actual head is preferably 9 to 61, particularly preferably 11 to 27, and more preferably 14 to 18. Next (1) (2) (3) (4) (5). Errors with extremely small number of holes can be avoided.
(1) For the reaction of only one optical sensor, the hole is determined as the hit point position.
(2) For the reaction of the optical sensor with two holes, the intermediate position between the two holes is determined as the hit position.
(3) For the reaction of the three-hole optical sensor, the center of a triangular circumscribed circle having three points as vertices is used.

(4) For the response of the four-hole optical sensor, the center of a quadrilateral circumscribed circle having four points as vertices is used.
(5) Thereafter, for the response of the optical sensor of the N hole, the “center of gravity” referred to in the present invention is determined as the hit point position according to the center of gravity calculation method.

In FIG. 1, when the ball is smaller than this circle, a circle (106) is a minimum contact surface circle in the sense that it cannot be measured because it does not touch any hole (no hole is dimmed). Let this diameter be R. R = √2 × 2D is calculated.

Furthermore, there are at least four holes in the striking face face, and the holes are arranged substantially in the grid pattern or in the vicinity thereof. This is a practice club with an increased hitting position display angle characterized by being in a “teleko” state. An example of the arrangement is shown in FIG.

The “Teleko” arrangement in the present invention is an improved arrangement of grid-like holes in order to reduce the number of holes and further improve the position determination accuracy. This is shown in FIG. An example of improved arrangement is shown in FIG. 201 is an outer shape of the club head, 202 is a lower end of the club shaft, 203 is a face surface, 204 is an arrangement of holes provided in the face, and 205 is a dotted line provided to make the arrangement of the holes easy to understand. The circle 204 indicates a hole, and the dotted line 205 in the grid is only a line for helping understanding. Each hole 204 is shifted half a turn for each row of the head. Here, the expression “teleco” is used.

Reference numeral 206 denotes a circle that is a triangular circumscribed circle having three holes as apexes, and 207 is a diameter (R) thereof. In other words, it is the “minimum detection radius”. R = 2.5D can be calculated. Therefore, it was recognized that << (2√2-2.5) / 2√2 >> can be improved by about 12%. This relationship can be similarly applied to the detection error of the hit point position. Here, “teleko” may be telescopic by column or telescopic by row, and the reference line of the row / column may be inclined.

Also, it can be easily understood that the interval is not required to be exactly one half of the interval. That is, even a little “shift” can exert the improvement effect, and the degree of shift is not limited.

For example, in the case of a teleco, the grid interval (cycle) is shifted by 8 mm. That is, it is shifted to 8 mm. This improvement effect is also a surprising new finding. This was also a surprising new knowledge that only those who did.

In the present invention, at least a part of the shaft or head of the club is further covered with a power generation material, and the sensor or the sensor power source or the display unit power source is connected. This is a club for practice of hitting position detection. These are achieved by winding the upper surface of the club head or the shaft.

Some people send golf club bags directly from one country club to the next. Therefore, many people forget the battery. In order to avoid this, it is extremely important to eliminate the need for a battery or extend the life of the battery. Recently, in response to the rapid performance improvement of the light-receiving power generation film, a battery can be eliminated by winding or sticking a solar cell (many films) around the surface of the club shaft. Since golf is performed in a bright place, a light source is easily secured.

Further, as another additional function in the present invention, a power-saving type capable of detecting a striking position, characterized by having a sensor unit that makes a measurement state by swinging a club and a reset button unit that restores the disappeared image Includes practice clubs. It is preferable that an acceleration sensor or the like provided in the club detects the swing by shaking the club, and the previous display screen is turned off to enter the measurement state. By doing so, it is possible to automatically enter a measurement state without pressing a switch or the like.

But sometimes you want to see the previous state. It was not until I tested this club that I accidentally shook it. At that time, it includes one provided with a memory part so that the screen can be returned to its original state by pressing the reset button.

In addition, since there are words such as acceleration sensor and impact sensor in the above-mentioned known examples, the main part of the present invention may be misunderstood as the same usage, so that it is easy to understand. This will be described with reference to the assumed curve graph [FIG. The vertical axis represents the sensor output voltage, and the horizontal axis represents the time axis. This is to help understand how the sensor is used for the swing.

(1) First, start swinging the club.
(2) Since the output voltage (304) of the acceleration sensor becomes high immediately before hitting, the time is detected.
(3) When the voltage reaches the point 305 in FIG. 3, the measurement start point (306) is switched on. There is a time lag because it is input after the determination, and is input at 312 time points.
(4) The photo sensor starts working (303). The impact sensor also begins to work (307).
(5) The ball begins to hit the club head face strongly (not visible, but the ball will gradually collapse and deform). The output voltage (307) of the impact sensor changes. That is, some hole (optical sensor) is covered with a ball and the amount of light decreases, and the voltage starts to decrease. The microcomputer determines that the impact sensor continues to work, the voltage continues to rise, and reaches a certain value (308). This is called the time of impact (309).

(6) The microcomputer receives this value (308).
(7) The microcomputer moves to the hitting position detection state. Although it is an extremely short time, it takes time.
(8) Then, after a while, the output voltage value of the photosensor (311) is read before the ball leaves the face. A number of the covered holes are detected that light has stopped entering. This is called a transmitted light detection time point (310).
(9) The hit position is calculated from this data and displayed.

(10) When the hit is completed, the ball goes away, so it goes without saying that the voltage value of the photosensor in the portion hit by the ball becomes as high as the original. Since it is no longer relevant, it goes without saying that it's part of the figure.
(11) The power-saving type has an extra acceleration sensor, and it goes without saying that the main part of the present invention can be achieved without this.

The time from the measurement start time (306) until at least one of the photo sensor and the impact sensor starts to work is a time lag between the microcomputer and the electronic circuit.
In addition, if the club face is handled so that power saving and erroneous detection are not a problem, and the worry of erroneous detection and power saving are not considered, the power supply may be always energized.

On the other hand, the difference between the impact time (309) and the transmitted light detection time (310) is also a time lag from detection by the microcomputer, which is an extremely important matter. If the detection at 311 is slow, the ball is no longer on the face. Fast detection with a microcomputer is important.

On the other hand, in the present invention, it is operated by receiving power from a transmission antenna provided in a club only by bringing it closer to a display device with a receiving antenna provided separately or a wristwatch type display unit, and the sensed information is transmitted, Alternatively, a hitting position detection practice club characterized by being a set with a receiving unit to be processed is also included. Radio waves necessary for reception are emitted from the club side, but can also be emitted from the reception side. Therefore, a film provided with a printed coil can be used effectively.

There are times when you want to process the person's habits and data statistically, or analyze statistics. At that time, it is necessary to transfer the data to another device, such as a mobile phone, mobile personal computer, or wristwatch type microcomputer in a broad sense. In clubs, the accumulation of large volumes of data is undesirable because it increases weight and is preferably transferred to a nearby device. This can be transferred wirelessly (RFID).

This purpose can be said to be a power-saving type and a lightweight type. Although a swing speed measuring unit or an acceleration sensor measuring unit is provided, since this type of sensor is already on the market, it exerts a great effect by docking with the product of the present invention.

In the test before reaching the present invention, vertical and horizontal numbers, symbols, and signs are provided on the face drawing created separately to indicate the positions of the hit points. First of all, a method of knowing the location of the hitting point was conceived by comparing the sign with the sign of the face drawing with the sign at hand when displayed on a small monitor.

Although this method has a serious defect that must be compared one by one, on the other hand, since the monitor can be made very small, there is an advantage that it can be manufactured at low cost and without getting in the way.

If the face is numbered horizontally with Arabic numerals 1, 2, 3, 4, 5,..., The letters “A”, “I”, “U”, “E” and “O” are added vertically, and “1 a” is displayed again. Then, because it is on the front direction, this person will say that there is a “1”. However, it is not interesting and inconvenient to bring the table separately.

In order to display where it was hit, it is very important to display the face outline on the monitor part by displaying the outline of the face part and where it was hit. It is very easy to understand if it is displayed by approximating the face part outline display or inverted trapezoid.

When a golf club has a photo sensor, a microcomputer, a display, and a power source on the face and back of the golf club with holes, the power is re-input when the power is turned off or on. Of course, a club for practice capable of detecting a striking position is also included, which is a computer unit having a calculation setting that automatically becomes measurable at the same time.

In the present invention, there is also included a practice club capable of detecting a shooting position, wherein the display portion is provided on a shaft portion immediately below the grip.

Further, the present invention includes a hitting position detection practice club characterized in that each hole is substantially filled with a light guide material. The hole should only allow light to pass, so I would like to emphasize that organic glass, strong inorganic glass, and transparent rubber can be used.

Prevents the strength of the face from decreasing, prevents the flight distance from decreasing, prevents clogging in holes such as dust, dirt, rainwater, grass, and lawn, prevents deterioration of electronic components, and prevents short circuits. Has the effect of maintaining insulation.

The inside of the head is normally a hollow, but it is preferable to fill it with a foamed resin or the like to form a solid state. This is because the reinforcement is maintained without increasing the weight, and the electronic device is supported or protected. The solid-state material is not shown here, but the material used in the polymer chemistry industry and the electronic materials industry is used as appropriate. In particular, a foam is preferable because it can be lightened.

Further, in the present invention, a striking position with improved accuracy of striking position detection, characterized in that a reference hole is provided in the corner of the face portion where the ball is difficult to hit, for comparison and comparison of light change due to striking. Includes a detection practice club. In addition, the present invention includes a combination in which an acceleration sensor or a speed sensor is mounted at the moment immediately before hitting and a time when the acceleration or speed becomes a certain value or more is determined to be immediately before. At this time, it includes entering a measurement mode, and turning on and setting necessary electronic circuit power.

In the present invention, it is important in a psychological sense to blink and inform the LED when entering the measurement state. Such a mechanism may be used. You can have pronunciation and speaking functions such as “Nice shot” when you are in a good strike position, music is sounding, and when it is not good, encouragement. By renting this cheap machine, you can put an advertisement in this call. This promotion method can also be used to popularize this kind of equipment.

Since this club belongs to an electronic device to the last, it is important to strengthen the seal, strengthen the water repellency, and coat the water and water repellent. Because there is a sudden rain. The combined use with a waterproof golf club bag is particularly preferable [for example, pair sales].

1) It has become possible to provide extremely good information (hitting position) for a batting practitioner.
2) It became possible to know the hitting position on the ground without any device.
3) No need for external equipment.
4) There is no need to stick or peel off pressure sensitive paper one by one.
5) Become a rental club. Prosperity of the practice area.

6) Although a hole is made in the face, it is hardly noticed because it is filled with a transparent material.
7) Practice is fun. (Improve training efficiency, change how to hit, music, shout, level up)
8) Battery replenishment is low.
9) The striking position is easy to see.
10) Because it is light, it is close to the one that does not incorporate this kind of equipment.

11) Advertising media.
12) Increased satisfaction, undisclosed superiority, and status due to unintelligibility.

The following examples illustrate the invention in more detail. However, this example does not limit the effectiveness of the present invention.

The following drilling process was performed on a golf club (No. 1 wood: driver). A hole is formed in the face surface made of a titanium alloy and having a thickness of 2 mm. As shown, 16 holes with a diameter of 1.2 mm were provided in the teleco. (Note: Initially, 0.3 mm was left, but the amount of light was insufficient.) It was made so that the bottom of the head could be opened and screwed.

Next, the hole portion was filled with a translucent resin, and the surface was treated so as to be smooth. The hole filling material was obtained from a large mass retailer and used a highly transparent material. Next, a rubber pad having a hole at the same position as the face surface was manufactured, and a photo sensor obtained from a Japanese electric manufacturer was bonded and fixed to each hole portion, and the rubber pad was bonded and fixed to the back surface of the face. A rubber pad between the face surface and the photosensor serves as both a sensor fixing and a damper. This was joined with a commercially available impact-resistant adhesive.

The electronic circuit board amplifies the signals of the 16 photosensors through a multiplexer, and fetches them into the CPU built in the A / D converter. That is, using a multiplexer and an operational amplifier, the data was taken into a CPU (A / D conversion speed 7 μs / sample). The impact sensor was mounted on the head and the acceleration sensor was mounted on the substrate.

The CPU monitors the swing state from the acceleration signal, enters the measurement mode (312) immediately before hitting, detects the hitting point (309) with an impact sensor, and hits the hit position from the signals of the 16 photosensors at that time. Was obtained by calculation.

The determined hitting position was displayed on a liquid crystal display provided under the club grip (on the head side). The liquid crystal display was 32 dots × 120 dots (monochrome, STN liquid crystal display device). For the wiring between the CPU and the liquid crystal display, an ultra-fine stranded wire (40 copper wires, diameter 0.185 mm) was used to make the club as light as possible.

The number of photosensors for each hole was about 0.3 gram / piece, and a total of 16 holes, so the weight was 4.8 gram. The hit results were very good, and both the test results with the hitting robot and the test with the hit hammer were correctly displayed on the monitor at a substantial level. The sensitivity of this light receiving sensor is as shown in FIG.

Next, an example of data of a performance test result of a photosensor provided in the head, not a hit test, will be shown. The condition at that time is an angle (θ = theta, unit degree) between the club head face 401 and the ground surface 402 as shown in FIG. The results are shown in FIG. Of course, θ (theta) is neither a loft angle nor a lie angle.

In FIG. 5, the electromotive force voltage [mV] when the ball is in contact with the hole, the electromotive force voltage [mV] when the ball is not in contact, and the illuminance of the face surface are expressed in looks [lx]. ing. Of course, it goes without saying that the illuminance changes if the weather, environment, etc. change. A Minolta Digital Illuminometer (T-1H) manufactured by Minolta Co., Ltd. was used.

However, this experiment is only an example, but when the ball is not in contact and when it is in contact, the figure in FIG. Tells us that we were very lucky. In other words, as an actual problem, it can be considered that at least the ball hits the face, so that erroneous determination is extremely difficult to occur. The size of the holes does not limit this patent.

The present invention is not limited to a golf club driver having a hollow portion in the head, and can be implemented by providing a light hole and a light sensor even in an iron or putter having no hollow portion. The present invention is not only useful for specifying the hitting position of a golf club. By using this specifying technique, it can be applied to detection of a collision position when an object collides in a planar shape of a moving body, for example, sports equipment such as a baseball bat or a table tennis racket, a tool, and the like. Furthermore, it can be used effectively for baseball pitching practice and tennis serve practice for the board.

FIG. 4 is a view for explaining an example of a “grid-like” arrangement of a large number of holes provided in the face portion of the club head portion employed in the present invention. FIG. 4 is a diagram for explaining an example of the “teleco” arrangement with respect to the “cross grid” of a large number of holes provided in the face portion of the golf club head portion adopted in the present invention. FIG. 3 is a model explanatory diagram for easily understanding and understanding a complicated front-rear relationship in a minute time of various relations among instruction processing times of an acceleration sensor, an impact sensor, a photo sensor, and a microcomputer. These are the schematic diagrams for demonstrating the angle ((theta)) which a face surface makes with the ground. This is an example in which various face angles are taken, and voltage values and face illuminance (looks) produced by a photosensor corresponding to the presence / absence of a ball.

Explanation of symbols

Reference numeral 101 denotes an outer shape of the club head viewed from the face surface in FIG.
Reference numeral 102 denotes the lower end of the shaft portion in FIG.
Reference numeral 103 denotes a face portion viewed from the outside.
Reference numeral 104 denotes a hole for taking light from the face portion into the head.
Reference numeral 105 denotes an auxiliary line for making the “cross-cut” arrangement of the holes particularly easy to understand.
Reference numeral 106 denotes a minimum contact surface [circle].
Reference numeral 107 denotes the diameter of the circle of the minimum contact surface.
201 denotes the outer shape of the club head viewed from the face surface in FIG.
202 shows the lower end of the shaft part in FIG.
Reference numeral 203 denotes a face surface.
Reference numeral 204 denotes the position of the hole in the “Teleko” arrangement that alternately repeats the grid pattern by half a cycle.
205 is an auxiliary line having a special meaning for easy understanding and understanding the relation between the grid and its “Teleko”.
Reference numeral 206 denotes a minimum contact surface [circle].
Reference numeral 207 denotes the diameter of the minimum contact circle in the “Teleko” arrangement.
Reference numeral 301 denotes an output voltage axis of the sensor in FIG.
Reference numeral 302 denotes a time axis in FIG.
Reference numeral 303 denotes a voltage taken in by the microcomputer from the photosensor.
Reference numeral 304 denotes a voltage curve of the acceleration sensor.
Reference numeral 305 denotes a measurement start determination reference voltage.
Reference numeral 306 denotes a measurement start time.
Reference numeral 307 denotes the voltage of the impact sensor.
Reference numeral 308 denotes an impact time determination reference voltage.
Reference numeral 309 denotes a time for determining the hit point.
Reference numeral 310 denotes a transmitted light detection time.
Reference numeral 311 denotes a voltage taken in by the microcomputer from the photosensor.
Reference numeral 312 denotes a power-on point of the photo sensor or the like.
401 indicates the face surface in FIG.
402 shows a flat ground,
403 indicates a club head,
θ represents an angle formed by the face surface and the ground.

Claims (10)

There are three or more holes on the hitting face of the golf club, and an optical sensor is provided on the back of the golf club. The sensor has a sensor that recognizes the impact of hitting, and light is reduced by the hitting ball. A microcomputer unit with a calculation function software circuit that substantially assumes that the ball hits the center of gravity calculated according to the formula of the proviso from the illuminated multi-hole optical sensor, and the approximate outline of the face and the striking position at the same time. A golf club for practice of hitting position detection, characterized in that a display unit for displaying and a power source unit are attached at the same time.
However, the gravity center calculation software for determining the hitting position of the microcomputer here uses (x _n , y _m ) as the position of the hole where the light is attenuated with respect to the orthogonal axes x and y, and each weight is set to be uniform. The position (x _g , y _g ) is
(X _g , y _g ) = ((x ₁ + x ₂ + x ₃ ... + X _n ) / n, (y ₁ + y ₂ + y ₃ ... + Y _n ) / n)
Therefore, the calculation is performed. Three or more holes are provided in the golf club's striking face face, a light sensor is provided on the back, a striking sensor part is provided for recognizing the impact of the impact, and the "center of gravity" Including a microcomputer with calculation function software that substantially considers that the ball has hit, a display unit that displays the approximate outline of the face and the hitting position, and a method of attaching a power supply unit at the same time A method of manufacturing a golf club for practice capable of detecting a hitting position.
However, the calculation function software of the part named “center of gravity” here assumes that the position of the hole where light is attenuated with respect to the orthogonal axes x and y is (x _n , y _m ), and that each weight is uniform. The center of gravity (x _g , y _g ) is
(X _g , y _g ) = ((x ₁ + x ₂ + x ₃ ... + X _n ) / n, (y ₁ + y ₂ + y ₃ ... + Y _n ) / n)
Therefore, the calculation is performed. In a golf club having a photosensor portion, a microcomputer, a display portion, and a power supply portion on the face portion of the golf club having a hole and the back portion of the face portion, the center portion of the hit ball is substantially located with respect to the face portion of the golf club. In particular, the display part is at least one selected from “•” point display, “ten” cross display, “×” × display, or “○”, “●”, “◎” circle display. A practice club capable of detecting the striking position 4. The practice club according to claim 3, further comprising a display unit having a display / symbol "flashing" function. The striking position display accuracy according to claim 1, wherein the striking face face has at least four or more holes, and the holes are arranged substantially in a "cross grid" or in the vicinity thereof. Enhanced practice club. 2. The striking face face according to claim 1, wherein the striking face face has at least four holes, and the holes are arranged substantially in the grid or in the vicinity thereof. A club for practice with a high accuracy of displaying the hitting position, characterized by being in a “Telekono grid” state that is shifted by half a cycle. 2. The method according to claim 1, further comprising a portion in which at least a part of a shaft or head of the club is covered with a power generation material, and a connection for supplying a power source of the sensor or the sensor or a power source of the display unit is made. Club for practicing hitting position detection with power generation function 2. The practice club according to claim 1, further comprising: a sensor unit that is brought into a measurement state by shaking; and a reset button unit that restores the disappeared image. In claim 1, it is possible to receive power from a transmission antenna provided in a club and transmit sensed information only by bringing it closer to a display device with a receiving antenna provided separately or a wristwatch type display unit, or A club for practicing hitting position detection, characterized in that it is a set with a receiving unit to be processed. 3. The apparatus according to claim 1, further comprising a swing speed measuring unit or an acceleration sensor measuring unit, wherein the microcomputer and the optical sensor unit are turned on when the swing speed or acceleration exceeds a set value. A club for practice of hitting position detection, characterized by having

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