Abstract:
The portable golf impact practice mat is a golf practice mat that provides visual indicators to inform of three extremely important impact conditions using a digital display, a signal generating unit and a plurality of LED (light emitting diode). One of them indicates the swing path in reference to how the golf club head moves toward the target. Another detects and indicates if the club head hits the golf mat in front of the ball also known as a “fat shot”. Lastly, the third displays a club head speed upon impact. The present invention is designed to be used by attaching to the general golf practice mats widely found in public golf driving ranges or personal golf practice mats. The present invention is compact, folds in half and fits in one-hand providing portability.

Description:
FIELD OF THE INVENTION 
     The present invention relates to a portable golf swing practice mat and, more particularly, to an attachable correct impact practice mat including three indicators to inform three impact conditions, indicating a path of the golf club head, indicating a detected fat shot and displaying a swing speed. 
     BACKGROUND OF THE INVENTION 
     The game of golf is to put a golf ball into a series of the hole cups, starting from certain points known as a “tee box” located on various distances. The player uses various golf clubs in as few strokes as possible, during the game. To achieve this goal and place the ball into a hole in as few strokes as possible, a longer and more accurate golf shot is extremely important. In fact, many amateur golfers are focusing on a swing technique for power rather than a swing technique of how to make a correct impact. For example, some teenage boys and girls who want to be professional golfers are hitting a ball farther and more accurate than general adult golfers do, even though they are physically weaker. This proves the point that it is more important for a swing technique focusing on correct impact rather than a swing technique of power. Without realizing this point, most amateur golfers are practicing a lot to improve their swings but it is not improve because they are still focus on the swing technique of hitting the ball more powerfully. 
     Many golfers have no idea what their swing flaws are, because they don&#39;t have any information about the moment of contact in when the club head meets the ball. Most would follow instructions from a golf teaching professional without fully understanding the reason behind it. 
     The opportunity to invent this apparatus was derived from the idea that if there was a device that could provide accurate indication during the golf ball impact of the golf swing, many golfers will improve the techniques efficiently in a short period of time. Golfers, who use the present invention, will improve their swing easily by receiving feedback of the golf swing immediately through the indicators. The present invention also will help augment any adjustments from golf teaching professionals in order to create the “perfect swing”. 
     According to science, there must be four conditions met to achieve the perfect impact on the golf swing: 
     First, the club head must hit the ball in a parallel direction to the target point. (refer to  FIG. 3B ) 
     Second, the club head must hit the ball directly without hitting the ground, first. (refer to  FIG. 4B ) 
     Third, the club face must contact with the ball at the right angle to the target direction. (refer to  FIG. 5B ) 
     Fourth, faster head speed will give a greater distance to the ball travel. 
     First, second and third are required conditions to achieve a perfect impact. 
     First, second, third and fourth are required conditions to send a ball more accurate and farther. 
     All golfers aspire to send a ball farther away or accurately to the desired distance and most golfers expend a lot of time and effort in developing a golf swing in order to obtain this result. But, it does not effectively improve, because most of them do not realize of the fact that there are many difference between the imagined swing that they wanted to do and an actual performed swing. 
     The present invention has three indicators to inform the golfer of three extremely important impact conditions. One of them indicates a path of the golf club head as that how the golf club head moves toward the target. Another indicates if the club head hits the golf mat before contact with the ball. Lastly, a third displays the club head speed. These indicators will show user&#39;s swing conditions accurately and will provide direction to where they need to adjust, by disclosing flaws in their swing. This would especially help golfers who do not see improvements despite the countless hours they exert in practicing the golf swing. The present invention would be an absolute must for novice golfers as they can leverage this invention to learn the correct swing from the beginning. This invention was designed with portability in mind to provide a practical device that is simple to use and convenient. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a golfer practicing by attaching the present invention to the general practice golf mat. 
         FIG. 2  is a perspective view of the folded shape of the present invention. 
         FIG. 3A  is a top view showing incorrect impact. The golf club head makes an in-to-out path. 
         FIG. 3B  is a top view showing one of the perfect impact conditions which the club head must hit the ball in a parallel direction to the target point. 
         FIG. 3C  is a top view showing incorrect impact. The golf club head makes an out-to-in path. 
         FIG. 4A  is a side view showing incorrect impact. The golf club head hit the golf mat first. 
         FIG. 4B  is a side view showing one of the perfect impact conditions which the golf club head must hit the ball directly without contacting the golf mat, first. 
         FIG. 4C  is a side view showing incorrect impact. The golf club head makes a topping ball. 
         FIG. 5A  is a top view showing incorrect impact. The golf club face is open. 
         FIG. 5B  is a top view showing one of the perfect impact conditions which the club face must contact with the ball at the right angle to the target direction. 
         FIG. 5C  is a top view showing incorrect impact. The golf club face is closed. 
         FIG. 6  is a side view for explaining a process in which the wire-activating switch is activated when the golf club head hit the detecting-wire, and it is showing a state before the detecting-wire is activated. 
         FIG. 6A  is a side view showing a state that the detecting-wire is activated by the golf club head passed through the impact area. 
         FIG. 7  is a top view for explaining a process in which the wire-activating switch is activated when the golf club head hit the detecting-wire, and it is showing a state before the detecting-wire is activated. 
         FIG. 7A  is a top view showing a process that the LED lights are emitting after the club head passed through the swing path sensor assembly and these are indicating the swing path accurately by emitted lights from front sensor bar and rear sensor bar. 
         FIG. 8  is a fragmentary side view for explaining that the wire-activating switch is activated when the golf club head hit the detecting-wire, and it is showing inside the wire-activating switch with the detecting wire which is sticking out the golf mat. 
         FIG. 8A  is a fragmentary side view to explain a process that the LED light is emitted when the golf club head is hitting the detecting wire, and it is showing a movement of the flexible terminal. 
         FIG. 9  is a fragmentary side view for explaining a process that the fat shot sensor assembly is detecting when the golf club head hits the golf mat in front of the ball and it is showing inside of the fat shot sensor assembly with two limit switches. 
         FIG. 9A  is a fragmentary side view showing that the limit switches in the fat shot sensor assembly are activating when the golf club head is hitting the golf mat in front of the ball and the lights on the control box are emitting. 
         FIG. 9B  is a perspective view, showing where the fat shot sensor assemblies is located. 
         FIG. 10  is a side view showing a process of measuring a speed of the golf club head and indicating it. It measures accurately the speed of the club head by difference of the touching time between the front detecting-wires and the rear detecting-wires. 
         FIG. 11  is a schematic drawing to illustrate the structure of the present invention and the location of all parts. 
         FIG. 11A  is a perspective view of the wire-activating switch. 
         FIG. 11B  is a perspective view showing a process of forming a sensor bar by connecting the wire-activating switches consecutively. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Some prior art were developed with a method of indicating the movement of golf club head using the mat made by special materials, but It was durable for prolonged use. Other prior art utilizes complicated apparatus and is only provided in specialized facilities. One prior art, in the case of video analyzer, which provides a way to calibrate and analyze a swing by reviewing the recorded information recorded with the video analyzer can provide similar results but it less effective because the swing can&#39;t be checked in real-time. 
     The present invention is made with similar material as the mats provided at the public golf driving range. Golfers will be find this invention familiar and will adjust to it quickly. This invention is designed to be used by attaching to the general golf practice mat or a private golf mat and is designed to fold in half so as to be easily carried with in hand. (refer to  FIG. 1  and  FIG. 2 ) 
     The portable golf impact practice mat, comprising:
         1. A swing path sensor assembly having two equal sensor bar  60 , the sensor bar  60  further comprises a series of the wire-activating switches  62  connected consecutively, one sensor bar  60  is disposed in front of the impact area  54 - 1  based on the target direction and the other is disposed behind, both are covered with the golf mat  54 . A plurality of the detecting wires  63  are sticking out from inside of the wire-activating switches  62 , which are major members of the swing path sensor assembly, toward the upper direction through a plurality of perforated holes  53  on the golf mat  54 , in purpose of detecting a golf club head  71 .   2. A fat shot sensor assembly  61  having at least two sensors  74  detect that the club head  71  hits the golf mat  54  in front of the ball known as a fat shot, are disposed around the impact area  51  and covered with the golf mat  54 .   3. A head speed sensors detecting the speed of the club head  71  by the difference of the touching time between the front detecting wires  63  and the rear detecting wires  63 , are disposed inside of the wire-activating switches  62 .   4. A perforated golf mat  54  having a plurality of holes  53  for sticking out the detecting-wires  63  from the swing path sensor assembly and for emitting LED lights  64 , formed an artificial turf like a general golf mat and is disposed upper of the impact area  54 - 1 .   5. A spacer plate  56  aligning equal height with other side, is disposed bottom layer of other side of the impact area  54 - 1 , and may be created as a container used for storage to put some handy tools and extra related parts.   6. A golf mat  54  forming an artificial turf like a general golf mat, is disposed above the spacer plate  56  at the other side of the impact area  54 - 1 .   7. A pair of longer side frame members  55  supporting both of longer sides of the entire golf mat  54 ,  54 - 1  which shaped a long rectangular, is approximately the same height as the golf mat  54 , and is made of a steel bar. Both are the bisected-frame members  55  which connected  59  to be able to fold in half, to make as a portable.   8. A pair of shorter side frame members  51 ,  56  having a sliding extension bar  57  each including a clamp  58  in purpose of attaching on a general golf mat, is approximately the same height as the golf mat  54 , and is made of a thin steel bar.   9. A control box  75  having the club head  71  speed indicator  77 , the fat shot indicator  76 , a reset button  78 , batteries, a secondary battery, power switch  79 , circuit, some control switches and the like.       

     The two critical components in the game of golf are the swing and the moment of impact in a swing. The key features of the present invention is to indicate immediately and accurately three important impact conditions through the light emitting device and the digital display, and these devices are mounted inside the control box  75  and underneath the golf mat  54  around the impact area  54 - 1 . Indicating the critical information about the swing, this invention will help improve the swing technique of many golfers. 
     Portability is another key feature of this invention. It was designed to be portable because every golfer should be able to use it easily. It would not be feasible for this invention to be the same size as the mats found in public/private driving ranges so this invention was designed to be folded in half. Even though it is smaller than the traditional golf mat, it retains similar attributes as a traditional golf mat. This invention retains similar material and similar height to a traditional mat. It is designed not to be a replacement to a traditional golf mat but rather an add-on device that attaches itself to a golf mat. The easy integration to a traditional mat will provide familiarity and an illusion that the invention is a part of the golf mat. The material for the invention is flexible and can be scale with any new material developed for golf mats. 
     The present invention is divided by the impact area side part and the other side part, by the folding part of the bisected-frame members  55 . Most of the sensors are mounted in the bottom layer of the impact area side part. And the bottom layer of the other side part is a residual extra space, can use the space as a container to store some extra tools and related parts, by creating a box with the same height as the sensors height of the impact area part. The upper layer is conforms with same material as general golf mats that using at public golf driving ranges and the mats on the impact area side part have a plurality of perforated holes  53  for sticking out the detecting-wires  63  from the swing path sensor assembly, and have a plurality of perforated holes  53  for emitting LED lights  64 . Especially, a plurality of holes  53  on the mat should be the elongated shape in order to do not affect the movement of the detecting-wires  63  because the detecting-wires  63  move to the target direction by hitting with the club head. The area around the perforated holes  53  should be strengthened because the holes  53  are too close to each other, and the frequently hitting area by the club. Thus, it needs to be reinforced this area with a very strong and flexible materials a kind of polyurethane or a stronger and soft similar materials. 
     A ball position  52  needs to be constant because it is related in determining the swing path. Thus, a rubber golf tee can be mounted in the middle of the impact area  54 - 1 , or it needs to mark a ball position  52  in the center of the impact area  54 - 1 . In particular, since the golf mat  54  of the impact area  54 - 1  is easy to be worn out, should be designed to be able to replace easily using the Velcro. The sensor assemblies that needed to analyze a golf impact conditions using the present invention are the swing path sensor assembly and the fat shot sensor assembly  61 . The swing path sensor assembly also has a function of detecting a golf club head speed. 
       FIG. 11A  is a perspective view showing the structure of the wire-activating switch  62 . The wire-activating switch  62  is the primary sensor of the present invention. A LED (light emitting diode)  64  and a resistor which are light emitting elements are mounted inside of the wire-activating switch  62  and it will emit the light when the detecting-wire  63  is activated by hitting with the club head  71 . The detecting-wire  63  is connected from inside of the wire-activating switch  62  toward to upper direction, and sticking out through a perforated hole  53  on the golf mat  54 . It is moved  72  to the target direction by hitting it with the club head  71  and it is activated a swing path signal lights, and measure the club head speed. When the club head  71  hits the detecting-wire  63  strongly by the swing, it carried out two different switching operations by moving to the direction of the club path at the same time. The first switching operation of the wire-activating switch  62  is as shown in the  FIG. 8 ,  FIG. 8A , when the club head  71  hits the detecting-wires  63 , the detecting-wire  63  is moved to the target direction, the sliding-parts  70  is moved along the detecting-wires  63 , and a thin flexible terminal  68  is connected with the bottom terminal  67  through the thin curved passage of the sliding parts  70 , and the LED light  64  emit by contact. The flexible terminal  68  and the bottom terminal  67  should be used a high electrical conductivity metals which can be go through the electricity very well, like a copper or a brass because it has a weak contact by structural characteristics of this switch. Especially, the thin flexible-terminal  68  should be moved smoothly along the thin curved passage of the sliding parts  70 , so it should be used very good resilience and electrical conductivity metals. 
     The sensor bar  60  comprises a series of the wire-activating switches  62  connected consecutively, and a pair of the sensor bars  60  composes a swing path sensor assembly, will indicate the path of the club head  71 . One sensor bar  60  is disposed in front of the impact area  54 - 1  based on the target direction and the other is disposed behind the impact area  54 - 1 , both are covered with the golf mat  54 . The detecting-wires  63  are sticking out from the inside of the wire-activating switches  62  toward to upper direction through a plurality of perforated holes  53  on the golf mat, will detects a golf club head  71 . As a golfer performs his/her swing, the club head hits the detecting-wires  63  from the front sensor bar  60 , the ball, and then the detecting-wires  63  from the rear sensor bar  60 . By hitting the detecting-wires  63  with the club head  71  during the swing, the corresponding LED lights  64  are emitted, and the front and rear emitted LED lights  64  show the club head  71  movements accurately. 
     In order to create a perfect impact that I mentioned earlier, the club head  71  must be traveled in a parallel direction to the target point. ( FIG. 3B ) If the club head  71  makes an out-to-in path ( FIG. 3A ), or in-to-out path, ( FIG. 3C ), it will make a spin a ball and the ball flight will be fade/slice or draw/hook respectively. And it tends to lose distance if the ball is not hit in a parallel to the target point. 
     The other switching operation of the wire-activating switch  62  is to measure the club head speed. It measures accurately the speed of the club head  71  by the difference of the touching time between the front sensor bar  60  and the rear sensor bar  60 . Obviously, the faster club head moves, further the ball flies. The first shot from the tee box is very important, and it will be advantageous to send a ball accurate and farther. Although the wire-activating switches  62  are fully protected underneath the golf mat, these are located in around a frequently hitting area. Therefore, the wire-activating switch  62  should be made of the material that is sturdy, abrasion durable and withstanding from hitting hard. Also, the detecting-wires  63  connected from the wire-activating switches  62  are hit frequently and strongly by the golf club. Thus, they should make of a very strong and a good elasticity/soft material such as a fishing wire and should designed to replace easily in case of broken. 
     Lastly, the fat shot sensor assembly  61  that detects a fat shot, is located underneath the golf mat around the impact area  54 - 1 . It will activate the signal generating unit by the sensors  74  in the fat shot sensor assembly  61 , if the club head  71  hits the golf mat  54  before it makes contact with the ball known as a fat shot. 
     The signal generating unit includes a speaker for generating a sound signal, the notification lamp  76  for generating a light signal using light. The signal generating unit is provided with both the notification lamp  76  and the speaker or may be provided with either one of the notification lamp  76  and the speaker. This fat shot sensor assembly  61  is required a device that allows to adjust the sensing intensity of the sensors  74 . Considering the rough area, It must be designed not to be affected, even if hit very strongly by a club head  71  or accidentally stepping on. The goal here is to hit the ball first before the club head hits the golf mat. Therefore, one should practice not to generate this notification lamp  74 . A fat shot greatly reduces the speed of the club, which reduces the speed of the ball and in turn decreases the distance the ball will travel. 
     The present invention thus shows the swing path, club head speed, and fat impact condition at the same time. One can self-analyze his/her swing, and therefore modify the swing immediately, and can be improved the swing much quickly and accurately, by repeating. Another thing that must be executed to achieve a perfect impact is that the club face must contact the ball at the right angle to the target point. (refer to  FIG. 5 ) And it should find a golfer&#39;s grip by changing the grip by itself to make the club face at a right angle. It is also an extremely important point. Besides these, it can be reset simply by pushing the reset button  78 , or by auto reset function that automatically reset under specific conditions set by the golfer for his/her convenience. 
     The battery and a power source such as a secondary battery is built in the control box  75 , and for the apparatus used in the indoor golf driving range is preferably formed to be connected with a separate adapter. 
     In conclusion, with respect to the above description, it is to be understood that the optimal dimensional specifications for the parts of the invention, including variations in number, size, shape, form, placement, material and the method of fabrication and assembly are deemed readily apparent to persons skilled in the art upon a reading of the foregoing description, and all equivalent specifications to those illustrated in the drawings and detailed in the description are intended to be encompassed by the present invention. Furthermore, it will be obvious to those skilled in the art that various modifications and revisions can be made to the embodiment shown herein without departing from the spirit and essential characteristics of the invention. It is therefore intended by the appended claims to cover any and all such modifications and revisions within the scope of the present invention.