JPH0416695Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a kind of automatic table tennis ball launching machine, especially a kind of automatic inconsistency or manual linear adjustment or fixed launching speed, pitching interval time, ball rotation direction,
This invention relates to a table tennis ball launcher that has multiple combinations of changes such as the falling point of the ball. Table tennis is a kind of indoor exercise that is very welcome, but it can only be played by at least two people. However, in today's society where individual lives are highly independent and autonomous, it is often difficult to find a partner or a partner with suitable ball skills, which is why I have been at the peak of interest until now. There may be times when you get discouraged, and no matter what kind of table tennis fan you are, the idea of defeating your opponent or defeating your opponent in a ball game is the main source of interest. That being said, even if you are a ball enthusiast, you have a tinge of interest and a desire to improve your own ball game. At present, several types of automatic table tennis batting training machines are in use, but the ball landing point is limited to a very narrow area and cannot effectively cover the entire surface of the court. Since the ball is launched in a ``disciplined left-right motion'', the falling point of the ball is only specified, limited to a narrow area, and completely within the expectations of the person hitting the ball. However, since it lacks irregular changes, it is less interesting. Even though the falling point has changed, the falling point after the change is still limited to a narrow area, and there is still little change. Some types of automatic table tennis machines currently in common use lack automatic change in the ball launch speed, ball launch interval time, ball rotation direction, ball drop point, etc. A monotonous ball launching action lacking any variation creates the following problems: 1. In commonly used table tennis machines, the launching tube moves back and forth from side to side in order to launch balls with different landing points. However, the firing tube's left-right reciprocating sliding motion must be ``disciplined,'' that is, the firing tube must always slide from the left extreme position to the right, and from the right extreme position to the right extreme position. After reaching the point, the ball begins to slide toward the left side, and it is impossible to reverse, change direction, or stop midway. Therefore, the landing point of the launched ball also depends on the discipline of the launching tube. Since the discipline can be found through the movement of the ball, the person hitting the ball can easily gauge where the next ball will land, which means that it lacks variety and interest. 2. No matter how you adjust it, once it's set, the drop point is always confined to a narrow area across the court, and there is no change from front to back. 3. No matter how you adjust the interval time between pitches, it is disciplined and lacks irregular changes. As a result, batters have to accurately determine when the next ball will be fired, resulting in a lack of variety and interest. However, if you want to change the pitch interval, you must stop hitting the ball and adjust it manually, so it cannot be adjusted automatically, and the interval after adjustment is still undisciplined. Therefore, both are not unexpected by the batter and lack variability. It's just a matter of repeating intensive training on a single item. 4 Once the ball speed of any ball is set, it will remain the same from start to finish and cannot change automatically. It can be adjusted manually, however, once the ball speed is set, it remains the same from beginning to end and is completely determined by the hitter's expectations, so it is only suitable for repeated and intensive training. Unable to provide, “automatic changeability”
It can be said that there is almost no irritation. 5. It is possible to launch a ball with spin, but the rotation direction of any spin is the same from start to finish and is completely dependent on the hitter's prediction. If you want to change the direction of rotation, you will have to stop hitting the ball and then manually adjust it again. However, once set, the direction of rotation will remain the same from beginning to end. Similarly, since we are still anticipating the hitters, we can only do repeated intensive training.
It lacks the excitement and interest of "automatic change". The present invention was developed in view of the fact that the commonly used table tennis machines lack automatic changeability and are therefore not suitable for team training.
Therefore, aiming to improve and innovate, after several years of research and extensive experimentation, he finally succeeded in designing a table tennis machine with various automatic changes. The characteristics of the
Alternatively, a ball launch tube with irregular vertical movement is used, and the ball is not only distributed throughout the court, but also has a point of fall that causes various automatic irregular changes. In addition, the present invention utilizes irregular convex foil to adjust the pitch speed and pitch interval.
It changes the spin of the fastball or the nonuniform direction, making the ball very varied in its launch.
It is a kind of automatic ball firing machine, which is very exciting and interesting. The present invention also allows the point of fall to be fixed at the pitch interval, fastball, or spin in a certain rotational direction.
It can be provided for repeated training of ball hitters. The features and objectives of the present invention are as follows. 1. The firing tube can be moved up, down, left and right, and a special control device allows the firing tube to scan from any point on the court via any other point. In other words, the firing tube can be oriented vertically, horizontally, diagonally, or
It is possible to scan trajectories such as mid-turn, mid-turn, limit turn, limit bend, or fixed point stop, and the continuous scanning trajectories formed by combining and arranging these scanning trajectories are ever-changing because they do not overlap. There is no complete discipline of "up and down" or "left and right", and in addition, by changing the time between shots, each falling point formed at the end cannot be disciplined at all, and "the batter is completely unable to do so." The main feature of this invention is that it is impossible to predict where the next ball will land. 2. Since the point of fall extends over the entire court and is not confined to a specific small area, it is difficult for the batter to protect himself. 3. A variety of different "ball speeds" can be produced, and the ball speed can change automatically each time the ball is launched.In other words, the ball speed changes automatically and irregularly, and the ball speed can be set arbitrarily and the ball is launched. You can also make the ball speed the same every time. 4. It is possible to automatically change the "interval time" between pitches, that is, it is possible to automatically and irregularly change the pitch interval time for each two pitches, and it is also possible to arbitrarily fix the pitch interval. Can be set on time. 5. It is possible to automatically select and launch a ``straight ball or spin'', and the rotation direction of the spin launched each time can be automatically changed, or it is possible to set a fixed pitch and launch a straight ball or spin. However, the rotational direction of the spin can also be set to a fixed rotational direction. 6 The above-mentioned “falling point”, “ball speed”, “ball launch interval time”,
“Fast ball or spin” and “spin in the wrong direction”
"singlely", "in part" or "in whole"
A large number of variations can be combined. In summary, the purpose of the present invention is to provide a kind of ``multi-variable table tennis automatic ball launcher'', which has a dropping point that can be fixed at will according to the needs of the ball hitter.
Fixed ball speed. Constant time between shots. And it can be set to fixedly launch a fastball or a constant rotational direction of spin, which is the "basic requirement" for repeated intensive training of gamers or practice entertainment for beginners.
(Note: General-use table tennis launching machines can only meet the above-mentioned "basic requirements"), and most importantly, this invention can also launch the following balls: 1. "Automatic" 2. Ball speed with automatic random variation; 3. Ball interval time with automatic random variation; 4. Automatic irregularity with fastball or spin ball; 5. automatic irregularity. 6. The above-mentioned "drop point", "ball speed", "ball launch interval time",
“Fast ball or spin” and “spin in the wrong direction”
takes many forms, including single, partial, and total combinations. Numerous other objects and advantages of the present invention can be understood from the following description, and the descriptions and figures in the manual and appendix figures are some good examples of the present invention. Looking at Figure 1, this means that on the table 10, a receiving net 12 can be set up around half the court, which is limited by the net 11, to catch the ball hit back by the practitioner and prevent it from scattering in all directions. Exempted. One ball collecting slope 13 is provided on the side of the table 10, and the ball collecting slope 13 is connected to the receiving net 1.
The balls 14 received by the two are concentrated in front of one blower device 15, and the balls 14 are concentrated by the blower 15 at the upper end of the automatic ball launching machine 20 by the subsequent feeding of one blower curved pipe 16. . Balls 14 concentrated at the upper end of the automatic ball launcher 20
The balls are hit to the opponent's court in order by the ball hitting elements in the ball launcher 20, and are provided to the practitioner for continuous hitting. FIG. 2 is an anatomical diagram of the ball launcher 20, in which the balls 14 concentrated in the blower curved tube 16 fall into a fixed launch tube 17 in the ball launcher 20. The diameter is slightly larger than the diameter of the ball 14, and several holes 18 are made on the tube wall to reduce the possibility that the ball 14 will be subjected to the resistance force of the air inside the tube when it moves forward; A ball receiving plate spring 19 is provided on the inner wall of the ball 17 to prevent the ball 14 from rolling forward before being hit; Referring to FIGS. 2B and 3, there is a ball hitting racket surface 21 on the side surface of the top end of the leaf spring 20, which is fixed on the sleeve 22 at the tail end of the leaf spring 20, and A roller wheel 47 is connected to the top surface of the spring 20, and the roller wheel 47 has an appropriate frictional force; the sleeve 22 is sleeved onto the shaft 31 of the main motor 30. A convex column 32 is provided on the shaft 31, and the convex column 32 can push and move one convex body 23 of the sleeve 22 to rotate the sleeve 22. The sleeve 22 rotates to adjust the top end of the leaf spring 20, and the adjustment lever 2 is horizontally movable.
4, the sleeve 22 continues to rotate, causing the leaf spring 20 to gradually curve and store elastic response energy. When the leaf spring 20 is disengaged from the engagement, the leaf spring 20 springs out at a high speed, causing the racket surface 21 to hit the center of the ball 14. After the ball 14 is hit at a high speed, the sleeve 22 continues to rotate and The spring 20 is damped by one fixed soft rubber piece 29, at this time the sleeve 22 and the leaf spring 20 are again connected to the shaft 31.
The ball waits for the ball to be pushed and moved by the convex pillar 32, and then the process of being pushed and moved again, curved and shot, is repeated. The adjustment lever 24 has two slide bars 2.
5 and 25' are used to connect the fixed firing tube 17 into the sliding groove 26, and the adjustment lever 24 can be moved slightly in a straight line in the horizontal direction, but cannot be moved up or down; the adjustment lever When the adjusting lever 24 moves forward, the degree of curvature of the leaf spring 20 can be increased, thereby increasing the firing speed of the ball 14; conversely, when the adjusting lever 24 moves backward, the firing speed of the ball 14 can be increased. will be relaxed. The horizontal movement of the adjustment lever 24 is achieved by a convex foil 28 pulled by a third motor 27 and one compression spring 3.
Compounded and completed by 3; the compression spring 3
3 is fixed on the fixed rod 34, and the other end is fixed on the adjustment lever 24, so that it has elasticity to push the adjustment lever 24 backward; the convex foil 28 is attached to the adjustment lever 24. The constant rotation of the convex foil 28 attached to the tail end causes the adjustment lever 24 to move back and forth irregularly, that is, the firing speed of the ball 14 changes irregularly;
Naturally, when the rotation of the third motor 27 is stopped, the ball speed is fixed. Separately, the shaft 35 of the convex foil 28 is extended outside the ball launcher 20 so that the ball speed can be adjusted manually after the third motor 27 stops rotating. Also, the above-mentioned fixing rod 34 is located just above the adjustment lever 2.
4 into the guide groove 36, and the adjustment lever 2
4 can be restricted so that it cannot move up and down. Furthermore, referring to FIG. 3, the main motor 3
0 can use one 2P double-oscillation switch SW ₁ to rotate the main motor 30 at a constant speed with linear adjustment by only being slightly controlled by the first variable electric resistance 37, or main motor 30
Irregular speed change rotation can be achieved by only slightly controlling the second variable electric resistance 38. In addition, when the shaft 31 of the main motor 30 rotates once, the leaf spring 20 is activated to complete the action of hitting the ball once, so by controlling the rotational speed of the main motor 30, the length of the time between hits can be controlled. . As shown in Fig. 3, when the 2P double-oscillation switch SW ₁ is moved to points a and a', the main motor 30 is turned on and the first variable electric resistance 3 is slightly changed.
A guide screw 40 is connected to a movable contact point 39 of the first variable electric resistor 37, which is used to exchange the electrical circuit with the electric circuit. 41, the guide screw 40 is extended and exposed outside the ball launcher, and by turning the guide screw 40 by hand, the first variable electric resistance 37 can be linearly adjusted, that is, the rotation of the main motor 30 is controlled by changing the voltage. You can change the speed. When the 2P double-oscillation switch SW ₁ is moved to points b and b', the main motor 30 is slightly connected to the second variable electric resistance 38 and the electric circuit of the fourth motor 42. variable resistance 3
One compression spring 45 is provided between the fixed point 43 and the movable contact point 44 of 8, and the movable contact point 44 is also moved back and forth irregularly by one convex foil 46. The convex foil 46 can be driven by the fourth motor 42 to rotate continuously; thus, due to the irregularly changing output voltage value of the second variable electric resistor 38, the main The motor 30 can be configured to rotate at irregular speeds. Furthermore, referring to FIG. 2, one driven gear 48 is fitted to the front end of the fixed firing tube 17, and the driven gear 48 and one main driving gear 49 mesh with each other, and this one main driving gear The gear 49 is driven by a fifth motor 50 to rotate continuously; a resilient arc-shaped plastic piece 51 is fixedly attached to the driven gear 48; The piece 51 is fixed at an angle toward the center line of the firing tube 17, allowing the ball 14 to pass through the plastic piece 51.
When the ball 14 passes through the plastic piece 51, the plastic piece 51 applies a frictional force in the tangential direction to the surface of the ball 14, causing the ball 1
4 itself to generate spin; and since the plastic piece 51 rotates continuously with the driven gear 48, any ball 14 will have irregular variations in its direction of rotation when ejected. Of course, if the rotation of the fifth motor 50 is stopped, the ball 14 can have a fixed direction of rotation during injection; if the driven gear 48 is rotated within a certain range of angles, exactly ball 1
When the ball is shot after hitting 4, the ball does not pass through the plastic piece 51, and the ball can be hit straight. The fixed firing tube 17, the main motor 30,
The structures such as the leaf spring 20, the adjustment lever 24, its attached elements, and the control element are all installed in a second sliding table 70 that can be slid up and down. At the same time, referring to FIGS. 2 and 2A, the ball launcher 20 of the present invention includes a fixed and immovable base 61;
It is installed on the first sliding table 60 above the one bottom table 61, and one bearing 62 is interposed between the bottom table 61 and the first sliding table 60. The rotation of the first motor 63 causes the entire first sliding table 60 to slide from side to side about a center line 65 above the bottom table 61 via a first sliding mechanism 64. A second sliding table 70 is installed in the first sliding table 60, and a connecting shaft 71 is provided between the second sliding table 70 and the first sliding table 60.
Therefore, the second sliding table 70
can be slid up and down about the connecting shaft 71 in correspondence with the first sliding table 60 . The vertical sliding movement of the second sliding table 70 is performed by a second motor 72 fixed on the second sliding table 70 and a second motor 72 interposed between the second motor 72 and the second sliding table 70. It is driven by two sliding mechanisms 73. That is, by driving the second sliding mechanism 73 by the second motor 73 and further driving the second sliding table 70 by the second sliding mechanism 73, the second sliding mechanism 73 is caused to slide vertically about the connecting shaft 71. This is because the first sliding table 60 can slide left and right, and the second sliding table 70 can also slide up and down within the first sliding table 60, so it is installed inside the second sliding table 70. If the ball 14 launched from the fixed ball tube 17 has a falling point that covers the entire court of the opponent, a set of falling point control devices should be taken into consideration, that is, if the ball 14 is launched from the fixed ball tube 17, the ball 14 can fall vertically and horizontally. If the sliding motion is made to result in irregular compound changes, the falling point can be made to automatically generate changes without any regularity;
How to control the drop point so that it changes automatically and irregularly will be explained in detail in the following text. The configuration of the first sliding mechanism 64 will be explained in detail below: A worm bar 66 is fixedly attached to the shaft of the first motor 63.
and one worm foil 67 mesh with each other,
The purpose of deceleration can be achieved; the worm wheel 67 transmits a disc 69 through one shaft 68 to perform a synchronized operation, and the shaft 68 of the worm wheel 67 is connected to one support 74 for the length. One bearing 75 is provided at the joint between the support 74 and the shaft 68; one eccentric rod 76 is fixed on the disk 69, and the other end of the eccentric rod 76 is provided with one bearing 75. Fitted onto the swing arm 77, the other end of the swing arm 77 is further fixed with a support post 78.
The fixed support 78 fitted onto the top is integrally connected to the fixed base 61; the eccentric rod 7
6, the disk 69 can be moved circumferentially, and the swing arm 77 can be converted into a swinging motion using the fixed support 78 as a fulcrum; A ring-shaped thrust bearing 62 is provided at the joint, and the bottom base 6
1 is fixed and immovable, so that the reaction force when the swing arm 77 swings causes the first sliding table 60 to perform horizontal horizontal sliding movement in the opposite direction to the swing arm 41. For example, when the first motor 63 rotates irregularly in the forward or reverse direction, the first sliding table 60 can be caused to irregularly slide horizontally. Similarly, the second sliding mechanism 73 between the second motor 72 and the second sliding table 70 is also the same as the first sliding mechanism 6.
This is the same configuration as No. 4. Referring to FIG. 4, the forward direction, reverse direction, rotation stop, etc. of the first motor 63 are jointly controlled by one manual selection ( _SW2 ) and one automatic control micro switch _SW3 ; When the select switch SW ₂ is moved to point C, the first motor 63 stops rotating, that is, the first sliding table 60 becomes fixed and immovable; when the select switch SW ₂ is moved to point d, the first motor 63 becomes stable. In other words, the first sliding table 60 makes a regular horizontal sliding movement; when the select switch SW ₂ is moved to point e, the first motor 63 is controlled by the automatically controlled micro switch SW ₃ . Thus, the first sliding table 60 irregularly rotates in the forward direction, reverse direction, or stops, that is, the first sliding table 60 makes irregular sliding movements in the leftward or rightward direction or stops. Similarly, the second motor 72 is also jointly controlled by another set of manual select switches and automatically controlled microswitches, so that it can rotate through a variety of different changes. As shown in FIGS. 5 and 6, the automatic control device for the two microswitches described above is such that the first control convex foil 79 (as shown in FIG. 5) is connected to the switch piece 80 of the first normal rotation microswitch _SW3 . The f point is connected, the g point is connected, or both the f point and the g point are not connected, and the first motor 63 shown in FIG. It is also used to control stopping operations. Furthermore, as shown in FIG. 6, the second control convex foil 81 is also connected to the switch piece 82 of the second forward/reverse micro switch SW ₄ and the h point, or to the i point. , or both are not connected to points h and i, and are used to control the forward rotation, reverse rotation, or stoppage of the second motor 72. First control convex foil 79 and second control convex foil 8
Since the structure of No. 1 is the same in all other respects except that their contour curves are different from each other, only the structure of the first control convex foil 79 will be explained here. Referring to FIG. 5, the rotating shaft 83 of the small motor (not shown) is connected to the key 84.
The latch wheel 85 is driven to rotate in the counterclockwise direction, and the latch wheel 85 further drives a click 86 mounted on the first control convex wheel 79, and this click 86 causes the first control to rotate. The convex wheel 79 is driven to also rotate counterclockwise, thereby controlling the up and down movement of the switch piece 80 of the first forward/reverse micro switch _SW3 . Separately, a first fine adjustment wheel 87 that rotates together is connected to the first control convex wheel 79 side. If it is necessary to change the correspondence between the first control convex wheel 79 and the second convex wheel 81 or the starting rotational position of both, only the first fine adjustment wheel 87 and/or the second control convex It is sufficient to push and move the second fine adjustment wheel 88 of the wheel 81. At the time of preparation, as shown in FIG. The click 86 on the first control convex foil 79 can slide over the ratchet teeth on the outer edge of the ratchet 85.
9 rotates, and the rotating shaft 83 does not rotate. In other words, the first control convex wheel 79 or the second control convex wheel 81 can be individually controlled, so the correspondence between them is also Can be changed. If both starting positions are to be adjusted at the same time, it is sufficient to simply push and move the two fine adjustment wheels 87 and 88 forward and backward. As shown in FIG. 5, the circumferential curve of the first control convex foil 79 has different diameters that are slightly different from each other. That is, the first outer diameter 90, which is the largest diameter,
A third outer diameter 91 having the smallest diameter, and a second outer diameter 92 having a diameter interposed between the first outer diameter 90 and the third outer diameter 91. When the first outer diameter 90 and the roller wheel 89 at the end of the switch piece 80 come into contact, forcefully connect the switch piece 80 and the f point to rotate the first motor 63 (as shown in FIG. 4) in the normal direction; Third outer diameter 91 and roller wheel 8
9, the switch piece 80 contacts its own elasticity and the g point, and can reverse the first motor 63; when the second outer diameter 92 and the roller wheel 89 come into contact, , the switch piece 80 is interposed between the f point and the g point, and the first motor 63 is cut off and stopped there, thereby providing a buffering effect when the first motor 63 switches between forward and reverse directions. Make it. If the second outer diameter is long enough, the first motor 63
It is possible to maintain the stopped state by doing this. The second control convex foil 81 as shown in FIG. 6 also has a first outer diameter 93, a second outer diameter 95, and a third outer diameter 94. The sizes of the three outer diameters of both the first control convex foil 99 and the second control convex foil 81 are the same, and the only difference is the size of the angle that each outer diameter occupies in the entire circumference. . However, the magnitude of these angles only affects the change in the scanning locus of the fixed firing tube 17. Next, I will give some explanation about it. As shown in Figure 7, it is the fifth
FIG. 8 is a diagram of the contour of the first control convex foil 79, and FIG. 8 is a diagram of the contour of the second control convex foil 81 shown in FIG. Figure 9 shows that Figures 7 and 8 rotate at the same time, and the first motor 63 (as shown in Figures 2 and 4) and the second motor 72 (as shown in Figure 2) rotate forward at different times. , when reversing or stopping, the fixed firing tube 17 is used to move upward, downward, leftward, rightward, etc. "singlely" or "combined" (as shown in Figure 2).
In this way, a scanning locus diagram is formed on the coated surface. Said seventh,
The contour curve shown in Figure 8 is just one example. When the first outer diameter 90 in FIG. 7 is applied alone, the scanning trajectory of the firing tube is directed to the right; when the third outer diameter 91 is applied independently, the scanning trajectory is directed to the left. When the first outer diameter 93 in FIG. 8 acts alone, the scanning trajectory is directed upward; when the third outer diameter 94 acts independently, the scanning trajectory becomes downward. Here, I will give an ideal example and add an explanation. First, the double-convex foil shown in Figures 7 and 8 is divided into six points, each marked with a corresponding symbol, and the joint action of this double-convex foil is calculated. As a result, the ideal scanning locus shown in FIG. 9 is formed.For ease of explanation, the locus between each point is drawn in a straight line, but in reality it is not necessarily a straight line. In this table, only the changes at points A to B to C are listed and explained, and the others are named accordingly.

【table】

[Table] As shown in Figure 9, "oblique" scanning for falling points A to B, "extreme bending" scanning for B to C, "sideways" scanning for D to E, t ₁
~C is "vertical" scanning, C~t ₃ is "midway folding", other "extreme folding", "midway folding"
etc., both "turn around" along the original course, the 9th
Although not illustrated in the figure, it is not difficult to imagine. Another point worth mentioning is that point A' in the scanning trajectory F-A' is the 7th point,
In Figure 8, it is shown that one cycle has already been completed, but since point A' is not superimposed with point A, the second to third cycle...
etc. do not overlap again, so we can get an explanation from this. Referring to the diagram shown in FIG. 10, the points Z ₁ ~
Y ₁ originally points upward to the right, but since it has reached its limit upwards, it has turned halfway downward (this is because when the sliding mechanism reaches its limit, that is, it slides from the opposite direction). However, since the left-right direction has not yet reached its limit, the direction remains to the right, and the effect of the merger is as shown in FIG. What is shown in Figure 11 is another kind of shape, in which both the vertical and horizontal directions between the Z ₂ point and the Y ₂ point do not touch the extreme limits, so the Z ₂ points are Tilt upward to the right and reach the _Y2 point. As shown in Fig. 12, if the Z ₃ point is to the left at the time of start-up, when the cycle is cycled again, the Z ₄ point will probably be to the right as shown in Fig. 13, and the Y ₃ and Y We make ₄ points so that they are not the same, and these two basic changes continue to change because they create scanning trajectories and no cycles are the same. In other words, the scanning trajectory continues to change ``indefinitely'' and has no ``discipline.'' As shown in Figure 2, if the main motor 3
When the rotational speed of the leaf spring 20 is changed, the rotational speed of the leaf spring 20 is also changed, and therefore the firing interval can be changed. Even if the trajectory remains the same, if the firing interval is changed, the flash point can change again. However, since the scanning trajectory of the present invention changes automatically and indefinitely,
Therefore, the variation in the launch point is even more numerous and more variable. Taking all the above into account, the main features of the present invention can be summarized as follows: 1. The present invention forms the scanning between the firing tube and the coat in an "indeterminate" manner, and Since there is no discipline to say "then go from right to left again," the trajectory of scanning automatically changes endlessly, reaching a falling point and becoming ever-changing. If the firing interval could be further adjusted, there would be even more changes. This point does not allow a table tennis batting training machine for general use to surpass it. 2. The scanning area of this invention covers the entire court, making it impossible for batters to prevent it. However, those for general use cannot automatically change back and forth, so they are limited to a small area. In this respect, it is far beyond the level of commonly used products. 3. Due to points 1 and 2, this invention makes it impossible for a ball hitter to completely predict where the next ball will land, thereby reducing its stimulation, interest, and training response. Achieved major goals such as improving ball skills and improving ball skills. 4. When necessary, the firing tube can be used for close training by simply scanning slightly horizontally, scanning vertically, or keeping it stationary. 5. He can produce various types of immovable “ball speeds,”
Moreover, the ball speed can be automatically changed each time the ball is hit, that is, the ball speed changes automatically and irregularly, and the ball speed can be set arbitrarily and the ball speed can be hit at the same speed every time. I can do it. 6. The "interval time" between pitches fired each time can be changed automatically, that is, the time interval between two pitches can be automatically and irregularly changed,
A fixed firing interval time can be set arbitrarily. 7. It is possible to automatically and selectively launch a ``straight ball or spin'', and the direction of spin can be automatically changed each time the ball is launched.
Further, it is possible to hit a fastball or a spin ball in a fixed manner, and the direction of rotation of the spin can be set to a fixed direction of rotation. 8 The above-mentioned “fall point”, “ball speed”, “ball launch interval time”,
“Fast ball or spin” and “spin in a different direction”
can be combined ``singly'', ``partially'' or ``in combination'' to form a large number of variations. What we can foresee is that even more changes, modifications and/or additions to the specific embodiments of the invention shown in the appendix figures and described above are possible, and that in no way can the invention be modified. Without departing from the spirit and scope, the patent scope of the present invention is therefore only limited to the appended claims.

[Brief explanation of the drawing]

FIG. 1 is an illustration of an actual installation of the present invention. Figure 2 is a detailed structural anatomical representation of the present invention, and Figure 2A is A- in Figure 2.
A-line anatomical plane display diagram. FIG. 2B is an enlarged view of part B in FIG. FIG. 3 is a diagram showing the control electric circuit and control elements of the main motor in the present invention. FIG. 4 is a control electrical circuit diagram of the first motor in the present invention. Figure 5
This is a diagram showing the structure of the automatic control microswitch of the first motor in the present invention. FIG. 6 is a schematic diagram of the automatic control microswitch structure of the second motor in the present invention. FIG. 7 is a display diagram of the first control convex foil in FIG. 5. FIG. 8 is an illustration of the second convex foil in FIG. 6. FIG. 9 is a display diagram of the scanning locus of the firing tube and the court due to the combined operation of both control convex foils shown in FIGS. 7 and 8. FIG. 10 is a diagram showing a special case of the firing tube scanning locus. FIG. 11 is another special example display diagram of the firing tube scanning locus. FIG. 12 is another special display diagram of the firing tube scanning locus. FIG. 13 is yet another special display diagram of the firing tube scanning locus.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A type of automatic table tennis ball launcher, which is characterized by comprising the following: With one fixed base, the base can be installed on any one end side of the table tennis table; With a first sliding base connected to the base, the first sliding base can be installed on any one end side of the table tennis table; By driving the first motor via the first sliding function, a horizontal sliding motion corresponding to the bottom base is performed; and a second sliding base whose shaft is connected to the inside of the first sliding base. , the second sliding table is driven by one second motor via a second sliding mechanism, thereby vertically sliding corresponding to the first sliding table: one second sliding table; A fixed firing tube installed inside, and the fixed firing tube and an external ball collection device are connected, so that one ping-pong game waiting for a ball to be fired at any time can be tolerated; Inside one fixed firing tube A leaf spring capable of launching ping-pong balls in an orderly manner, a rolling foil is connected to the top surface of the leaf spring, a racket surface for hitting a ball is provided on the side of the top end, and the bottom of the leaf spring the end is fixed on a sleeve, the sleeve being rotatably sleeved over the shaft of the main motor;
The shaft of the main motor can be rotated by intermittently pushing and moving the sleeve; there is a horizontally movable adjustment lever, and the adjustment lever stops the top end of the leaf spring for a while during rotation. It is possible to create a ping-pong ball by first applying elastic response energy to a leaf spring by bending it, and then launching it again at high speed. 2. An automatic table tennis ball launcher as described in Paragraph 1 of Claims for Utility Model Registration, in which a driven gear driven by a fifth motor is fitted to the exit end of the fixed launch tube. , a resilient arc-shaped plastic piece is fixed on the driven gear, and the arc-shaped plastic piece is slightly inclined to the center line of the fixed firing tube, and the arc-shaped plastic piece is played ping-pong. Its characteristic feature is that it passes through. 3. A kind of automatic table tennis ball launcher mentioned in paragraph 1 of the claims for registration of a utility model, in which the first motor and the second motor both have the same configuration, but are provided with mutually independent irregular rotation direction control devices. This is characterized by the fact that the rotation directions of the first motor and the second motor are independent of each other and form irregular combinations. 4. A kind of automatic table tennis ball launcher mentioned in paragraph 3 of the claims for utility model registration, in which the irregular rotation direction control device is a regular automatic ball launcher controlled by one manual select switch and one automatic control device. Its feature is that it is a composite control device composed of a reverse micro switch. 5. A type of automatic table tennis ball launcher mentioned in paragraph 4 of the claims for utility model registration, in which the automatic control device for the forward/reverse direction microswitch is characterized by including the following: (1) A small motor that is controlled and started by the corresponding select switch; A convex control wheel that is driven by the shaft of one small motor, and the convex control wheel has three unequal outer diameters, so it can be used as a forward/reverse micro switch. one that touches irregularly different end points; one that can manually and change control the elements at the corresponding position between the convex wheel and the small motor shaft; 6. A kind of automatic table tennis ball launching machine as stated in Claim 1 of the Utility Model Registration Claim, which is characterized in that the main motor has one irregular rotational speed control device. 7. An automatic table tennis ball launcher as described in claim 6 of the utility model registration claim, in which the main motor rotational speed control device includes the following: An electrical resistor, a guide screw is connected to the movable contact point of the first variable electrical resistor, and the guide screw can manually linearly adjust the output voltage value of the first variable electrical resistor. and; the movable contact point of the second variable electrical resistor is capable of irregular back and forth movement under the pulling movement of one convex foil, and the convex foil is One that rotates continuously due to the drive of four motors; One 2P double swing switch, each of which connects the main motor to the electrical circuit of the first variable air resistance, or and then slightly connect the second variable electrical resistance and the fourth motor electrical circuit. 8. A type of automatic table tennis ball launcher as stated in Claim 1 of the Utility Model Registration Claim, in which the adjustment lever is moved by a single convex foil, thereby causing irregular horizontal displacement; The convex foil is characterized by being independently driven by one third motor. 9. A kind of automatic table tennis ball launching machine as stated in Claim 8 of the Utility Model Registration Claim, in which the shaft of the convex foil extends to the outside of the launching machine, so that manual adjustment is possible. It is characterized by: