TWI453055B - Shuttlecock launcher - Google Patents

Description

Badminton serve

The present invention relates to a badminton serve machine, and more particularly to a technique for launching a badminton ball for the batter to perform badminton training.

Badminton is a fairly common ball sport. In order to improve the battering level of the badminton, no matter whether it is a beginner or a certain level of athletes or even professional athletes, it is necessary to do a defensive or attacking batting practice. The most traditional practice is to do the right fight. There must be at least two people in this practice. If you can't find someone to practice, you can't do it.

In order to improve the aforementioned inconvenience of personnel-to-play, various manufacturers have developed various types of badminton serve players. By designing the ball-feeding machine, the badminton can be automatically launched, and the exerciser can perform the back-attack exercise. For example, the patent No. I336262 of the Republic of China is a piston type badminton serve machine, which includes a launching tube and a scooping cylinder. The launching cylinder is provided with a piston mechanism. The scooping cylinder is provided with a valve flap, and the flap is used to control the badminton ball to enter the launching cylinder. The piston mechanism pushes the badminton ball to achieve the effect of serving. For example, the Republic of China No. M320417 patent is a mechanical badminton serve machine that includes a ball striking mechanism and a ball feeding mechanism. The ball striking mechanism includes a ball striking plate, and the ball feeding mechanism sends the badminton ball to the battering plate. Hit and hit the badminton. For example, the Republic of China No. M320418 patent is a jet badminton serve machine, including a ball-feeding module and a jet module. The ball-feeding module controls the entry of the badminton ball, and then the jet head of the jet module extends into the badminton ball and ejects the badminton ball. .

From the patent cases or commercially available products that are currently seen, it is known that the badminton serve machine is mainly used to launch a badminton by means of a jet, a push or a slap, and only a small amount of badminton can be filled. However, regardless of the jet, piston push or slap ball machine, the badminton must be controlled to enter the position to be fired separately, in order to be effectively shot. If several badminton balls are stacked, although the number of fillings can be increased, It is not easy to be individually controlled to enter the position to be fired. It is easy to cause the ball to be improperly delivered and the feathers of the badminton to be damaged. If the badminton balls are not stacked, the badminton ball can be effectively sent to the position to be served, but the number of fillings is greatly reduced. Furthermore, the above-mentioned conventional ball machine can only design a single ball cylinder for filling the badminton due to the overall structural design problem, but the number of badminton balls that can be filled by a single ball cylinder is very limited, so that it takes a short time to be used again. The action of filling the badminton makes it extremely inconvenient to use.

A first object of the present invention is to provide a badminton serve machine having a large amount of serve. The technical means for achieving this purpose include a base frame, and a ball feeding mechanism and a ball feeding mechanism provided on the base frame. The ball feeding mechanism is used to send the badminton ball to the teeing mechanism, and the ball feeding mechanism sends the badminton ball outward. The ball feeding mechanism comprises a rotating ring assembly, a plurality of ball cylinders and a first motor, wherein the plurality of ball ring rings are positioned on the rotating ring assembly; the first motor is operated to drive the rotating ring assembly to rotate at an angle, Having a ball cylinder located at a ball feeding position as a ball to be supplied; the ball feeding mechanism is configured to grasp a ball head of the badminton ball which is located at a center end of the to-be-supplied ball cylinder and is sent to the ball ball a serving mechanism; detecting, by a sensing component, whether there is still a badminton ball inside the ball barrel, and when there is no buffing ball in the ball barrel, generating a sensing signal; and receiving the sensing by a control module And generating a control signal according to the sensing signal, and controlling the first motor to operate by the control signal.

A second object of the present invention is to provide a badminton serve machine having a large amount of serve. The technical means for achieving this purpose include a base frame, and a ball feeding mechanism and a ball feeding mechanism provided on the base frame. The base frame is pivoted on a support frame, and the base frame is adjustable in angle with respect to the support frame. The support frame is provided with a body, the block body is provided with a longitudinal perforation and a transverse screw hole, the screw hole communicates with the perforation, the perforation runs through a rod body, one end of the rod body is pivotally connected to the base frame, the screw hole is locked with a bolt, the bolt The end is pierced to the perforation against the rod.

A third object of the present invention is to provide a badminton serve machine that can quickly and stably deliver a ball. The technical means for achieving this purpose include a base frame, and a ball feeding mechanism and a ball feeding mechanism provided on the base frame. The ball sending mechanism comprises a clamp, a two-link, a fixed rod, a crank and a second motor. The clamp, the two links and the base are pivoted into a four-bar linkage, and a second output of the second motor is fixed to the crank. . One end of the actuating rod is pivotally connected to one of the links, and the other end is pivotally connected to the crank and is positioned away from the second output end.

A fourth object of the present invention is to provide a badminton serve machine that can quickly and stably deliver a ball. The technical means for achieving this purpose include a base frame, and a ball feeding mechanism and a ball feeding mechanism provided on the base frame. The ball serving mechanism comprises two spaced-apart pressure rollers, and each of the pressure wheel circumferential sleeves is provided with an elastic collar. The ball feeding mechanism sends the ball head of the badminton ball between the two pressure rollers, and the ball is rolled by the second pressure roller to launch the buff ball outward.

one . A specific embodiment of the present invention achieving the first object

As shown in FIGS. 1 to 12, the present invention achieves a specific embodiment of the first object described above, and includes a base frame 10, and a ball feeding mechanism 20, a ball feeding mechanism 30, and a ball feeding mechanism 40 disposed on the base frame 10. The ball feeding mechanism 30 is used to send the badminton ball on the ball feeding mechanism 20 to the ball serving mechanism 40, and the ball ball 40 emits the buff ball outward.

Referring to Figures 1, 4 to 8, 11, 12 and 18, the ball feeding mechanism 20 includes a swivel assembly 21, a plurality of balls 22 and a first motor 23, and the plurality of balls 22 are positioned at the ring. On the swivel assembly 21. When the first motor 23 is in operation, the rotating ring assembly 21 is driven to rotate by an angle (the first motor 23 can be a stepping motor or a servo motor), so that a ball barrel 22 is located at a feeding position and is a ball barrel 22 to be supplied. . The ball feeding mechanism 30 is configured to grasp the badminton ball head positioned at one end of the center of the to-be-supplied ball cartridge 22 to be sent to the ball feeding mechanism 40. In addition, a first sensing component 50 detects whether there is still a badminton ball inside the ball barrel 22, and when there is no buffing ball in the ball barrel 22, a sensing signal is generated, and the sensing module 60 receives the sensing signal. The signal generates a control signal according to the sensing signal to control the signal to control the operation of the first motor 23.

Referring to Figures 1, 4, 13 and 14, in the present embodiment, the base frame 10 includes a chassis 11, a main frame 12 and a bracket 13 which are fixed together. The chassis 11 is provided with a ball feeding mechanism 40 thereon. The main frame 12 is provided with the ball feeding mechanism 20 thereon. The bracket 13 is provided with a ball feeding mechanism 30. The main frame 12 is separated and interlocked by two plates 120/121. The bottom frame 11 is U-shaped, and the two ends are welded to a plate 120 of the main frame 12, and the plate body 110 is fixed for the connecting piece 14 and the supporting body 45/46 is pivotally connected.

As shown in FIG. 1, 4 to 8, 11, 12 and 18, in the embodiment, the swivel assembly 21 includes a positioning ring 210, a guide ring 211 and a ring gear 212 that are fixed together. The positioning ring 210 is radially distributed by positioning a plurality of balls 22 thereon. The first motor 23 is fixed to the main frame 12, and a first output end thereof is provided with a gear 24. The gear 24 meshes with the teeth of the ring gear 212. The base frame 10 is pivotally provided with at least three rollers 25 on the same circle. Each of the rollers 25 is provided with a ring groove 26 on the circumferential surface thereof, and the inner edge of the guide ring 211 is embedded in the ring groove 26 of each roller 25. In this embodiment, the roller 25 has four and is pivotally disposed on the main frame 12 of the base frame 10.

Referring to Figures 1, 4 to 8, 11, 12 and 18, in the present embodiment, the base frame 10 is connected with two forwardly extending and two rearwardly extending connecting pieces 14/15, two forwards. The extended connecting piece 14 is used to connect the front cover 16, and the front cover 16 is provided with an opening 17 for the buff to be ejected. Two connecting pieces 15 extending rearward are used to connect the rear cover 18. The front cover 16 and the rear cover 18 are respectively butted against the positioning ring 210 to cover the ball feeding mechanism 30 and the ball feeding mechanism 40, so that the overall appearance is beautiful.

two. A specific embodiment of the present invention achieving the second object

As shown in FIGS. 1 to 12, the present invention achieves a specific embodiment of the second object described above, and includes a base frame 10, and a ball feeding mechanism 20, a ball feeding mechanism 30, and a ball feeding mechanism 40 disposed on the base frame 10. The ball feeding mechanism 30 is used to send the badminton ball on the ball feeding mechanism 20 to the ball serving mechanism 40, and the ball ball 40 emits the buff ball outward.

Referring to Figures 1, 4, 13 and 14, the base frame 10 is pivotally mounted on a support frame 70 such that the base frame 10 is angled relative to the support frame 70. The top of the support frame 70 is provided with a pivot hole 71. The support frame 70 is pivotally provided with a body 72. The block body 72 is provided with a longitudinal through hole 720 and a transverse screw hole 721. The screw hole 721 communicates with the through hole 720, and the through hole 720 runs through a rod. The body 73 has one end of the rod 73 pivotally connected to the base frame 10, and the other end is provided with a handle 74. The screw hole 721 is locked with a bolt 722. The end of the bolt 722 passes through the through hole 720 to abut against the rod 73.

Participation. A specific embodiment of the present invention achieving the third object

As shown in FIGS. 1 to 12, the present invention achieves a specific embodiment of the foregoing third object, and includes a base frame 10, and a ball feeding mechanism 20, a ball feeding mechanism 30, and a ball feeding mechanism 40 disposed on the base frame 10. The ball feeding mechanism 30 is used to send the badminton ball on the ball feeding mechanism 20 to the ball serving mechanism 40, and the ball ball 40 emits the buff ball outward.

Referring to FIGS. 1 to 3, 6 to 8, 11 and 12, the ball feeding mechanism 30 includes a clamp 31, two links 32/33, a fixed lever 34, a crank 35 and a second motor 36, and the clamp 31 The two links 32/33 and the base frame 10 are pivoted into a four-bar linkage mechanism. The second motor 36 is fixed to the bracket 13 and has a second output end that fixes the crank 35. One end of the actuating lever 34 is pivotally connected to a link 32 thereof, and the other end is pivotally connected to the crank 35 at a position offset from the second output end. Wherein, the bracket 13 is provided with a micro switch 37 on the stroke of the crank 35 (please refer to FIG. 8). When the crank 35 touches the micro switch 37, the second motor 36 is stopped. In addition, a second sensing component 51 senses whether the ball to be supplied by the ball cylinder 22 is extended. When the ball head of the ball is sensed, a sensing signal is generated to the control module 60 (please refer to 18), control module 60 generates control commands to control activation of second motor 36.

As shown in FIG. 2 , in the embodiment, the clamp 31 includes a positioning base 310 , a sliding seat 311 and two clamping rods 312 . The clamp 31 is pivotally connected to the two links 32/33 as a four-bar linkage by the positioning base 310. The positioning base 310 is provided with two through holes 313. The sliding block 311 is provided with two rods 314 and a rotating wheel 315. The two rods 314 are respectively disposed on the two through holes 313. The two clamping rods 312 are juxtaposed between the two ribs 316 formed on the top surface of the positioning base 310. The front side of the two clamping rods 312 is a clamping portion, and the rear portion is provided with two guiding rods 317, and is respectively spaced between an opposing rib 316. A second compression spring 318 is interposed. A rotating wheel 315 is interposed between the middle portions of the two clamping rods 312, and a tension spring 319 is connected. When the clamp 31 approaches the position of the holding badminton, the sliding seat 311 moves forward relative to the positioning base 310, and the rotating rod 315 connects the two clamping rods. The 312 is opened to insert the badminton ball head, the clamp 31 continues to move forward, and the sliding seat 311 is retracted relative to the positioning seat 310 by the elastic tension of the tension spring 319, so that the two clamping bars 312 effectively clamp the badminton ball.

肆. A specific embodiment of the present invention achieving the fourth object

As shown in FIGS. 1 to 12, the present invention achieves a specific embodiment of the foregoing fourth object, and includes a base frame 10, a ball feeding mechanism 20, a ball feeding mechanism 30, and a ball feeding mechanism 40 disposed on the base frame 10. The ball feeding mechanism 30 is used to send the badminton ball on the ball feeding mechanism 20 to the ball serving mechanism 40, and the ball ball 40 emits the buff ball outward.

Referring to Figures 1, 4 to 8, 11 and 12, the ball mechanism 40 includes two spaced-apart pressure rollers 41/42, and each of the pressure rollers 41/42 is sleeved with an elastic collar 43/44 ( The elastic collar 43/44 of the invention is made of silicone rubber after the experiment, and the softness and hardness can match the softness of the ball head of the badminton ball, which can increase the service life of the badminton ball). The ball feeding mechanism 30 sends the ball head of the badminton ball between the two pressure rollers 41/42, and the ball is rolled by the two pressure rollers 41/42 to launch the buff ball outward. Each of the pressure rollers 41/42 is disposed on the body 45/46, and is respectively driven by a third motor 47/48 disposed on the corresponding body 45/46, and the two ends of the two bodies 45/46 are respectively pivotally connected. The bottom frame 11 of the base frame 10 is connected to a pair of end plates 110/111, and the other end is connected with a tension spring 49. The tension spring 49 is used to make the two base bodies 45/46 and the second pressure rollers 41/42 have elastic forces against each other. .

Wu. Operation of the present invention

Please refer to FIGS. 1 to 18 for the operation of the present invention. First, all the bulbs 22 of the ring cloth on the swivel assembly 21 are filled with the badminton ball, and the spherical weights 80 (shown in FIG. 1) are placed to make the weights. The 80th position is at the last badminton. When the ball 22 is in the supply position and becomes the ball barrel 22, the badminton ball is pressed by the gravity of the weight 80, and the ball to be supplied 22 is directed to the center of the swivel assembly 21. The badminton head at one end effectively extends out of the ball tube 22 to be supplied. When the user turns on the power switch 61, and selects the hand/automatic switch 62 as automatic or manual In the mode, the second motor 36 starts to operate to drive the crank 35 to rotate, and the crank 35 interlocks the four-bar linkage formed by the base frame 10, the clamp 31, and the two links 32/33, so that the clamp 31 and the two links 32/33 are opposite. The base frame 10 is swung, and in the rotation stroke of the crank 35 from the top dead center to the bottom dead center, the four-bar linkage mechanism swings along an arcuate trajectory, and the jig 31 also translates along the curved trajectory (Figs. 6 to 8 are jigs). 31 positions are at the highest point of the trajectory, and Figs. 15 to 17 are positions where the clamp 31 is at the lowest point of the trajectory), wherein in the stroke in which the jig 31 moves from the highest point to the lowest point, the two clamping levers 312 of the jig 31 are clamped. The badminton head is placed, and the badminton ball is pulled out from the to-be-supplied ball cylinder 22, and finally sent to the two pressure rollers 41/42 of the service mechanism 40. When the automatic pressure or manual mode is started, the second pressure roller 41/42 is continuously rotated by the third motor 47/48, and the second pressure roller 41/42 is rotated in the opposite direction, once the ball head is sent to the second pressure roller 41/ Between 42 and the second pressure wheel 41/42, the ball is relatively pressed and the badminton ball is launched.

When the badminton ball in the ball-feeding cylinder 22 in the ball-feeding position is launched, the first sensing component 50 does not sense that the ball-ball head of the ball-handling cylinder 22 is extended, and a sensing signal is generated. The group 60 receives the sensing signal and generates a control signal according to the sensing signal to control the signal to control the operation of the first motor 23. When the first motor 23 is running, the driving gear 24 rotates by an angle, the gear 24 rotates the toothed ring 212 by an angle, and the positioning ring 210 rotates with the ring gear 212 by an angle, that is, the rotating ring assembly 21 rotates by an angle to make the next ball cylinder 22 is located at a ball feeding position and is a ball cylinder 22 to be supplied, and can continue to cooperate with the ball feeding mechanism 30 and the ball feeding mechanism 40, and performs the action of sending and emitting according to the above-mentioned operation flow. Wherein, when the automatic mode is selected, the automatic switch is turned on, and the ball 22 of the swivel assembly 21 is continuously turned to the supply position one by one, and the action of feeding, sending and launching is performed until all the balls 22 are not present. The badminton is stopped. When the manual mode is selected, the user can control the second motor 36 to drive the crank 35 to rotate one revolution by a firing command input button 63, and then sequentially control the ball feeding action of the ball feeding mechanism 30, that is, press the firing command input button 63 once, and the clamp 31 is pressed. Do a ball and send the ball.

Furthermore, the present invention can add a service speed adjustment module to the control module 60, so that the user can adjust the speed at which the badminton ball is launched, which mainly controls the rotation speed of the third motor 47/48 to drive the pressure roller 41/42. Different speeds are used to generate different speeds when the badminton is launched.

In addition, when the base frame 10 of the present invention is pivotally mounted on a support frame 70, the user can adjust the angle of the base frame 10 relative to the support frame 70, and the angle of the base frame 10 can be adjusted to adjust the angle at which the badminton ball is launched ( Figure 13 shows the angle of the upward launch and Figure 14 shows the horizontal launch. Please refer to FIG. 1 and FIG. 4, the adjustment action is to loosen the bolt 722 first, so that the bolt 722 no longer tightens the rod 73, and then rotate the base frame 10 relative to the support frame 70 to the desired angle, and then lock. The bolt 722 causes the end of the bolt 722 to tighten the rod 72 again, so that the base frame 10 is fixed at the angle with respect to the support frame 70.

The above is only one of the possible embodiments of the present invention, and is not intended to limit the scope of the patents of the present invention, and the equivalent implementations of other changes according to the contents, features and spirits of the following claims are It should be included in the scope of the patent of the present invention. The invention is specifically defined in the structural features of the request item, is not found in the same kind of articles, and has practicality and progress, has met the requirements of the invention patent, and has filed an application according to law, and invites the bureau to approve the patent according to law to maintain the present invention. The legal rights of the applicant.

10. . . Base frame

11. . . Chassis

110/111. . . Sheet

12. . . Main Frame

120/121. . . Plate

13. . . support

14/15. . . Connecting piece

16. . . The front cover

17. . . Opening

18. . . Back cover

20. . . Ball feeding mechanism

twenty one. . . Swivel assembly

210. . . Locating ring

211. . . Guide ring

212. . . Tooth ring

twenty two. . . Ball

twenty three. . . First motor

twenty four. . . gear

25. . . Wheel

26. . . Ring groove

30. . . Ball sending mechanism

31. . . Fixture

310. . . Positioning seat

311. . . Slide

312. . . Pinch

313. . . perforation

314. . . Rod body

315. . . Runner

316. . . Rib

317. . . Guide rod

318. . . compressed spring

319. . . Tension spring

32/33. . . link

34. . . Actuating lever

35. . . crank

36. . . Second motor

37. . . Micro Switch

40. . . Teeing mechanism

41/42. . . Pressure wheel

43/44. . . Elastic collar

45/46. . . Seat

47/48. . . Third motor

49. . . Tension spring

50. . . First sensing component

51. . . Second sensing component

60. . . Control module

61. . . switch

62. . . Hand/automatic switch

63. . . Launch command input button

70. . . Support frame

71. . . Pivot hole

72. . . Block

720. . . perforation

721. . . Screw hole

722. . . bolt

73. . . Rod body

74. . . Grip

80. . . Heavy block

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exploded perspective view of all of the body and main components of the present invention.

Fig. 2 is an exploded perspective view showing the ball feeding mechanism of the present invention.

Figure 3 is a schematic view showing the combination of the ball feeding mechanism of the present invention.

Fig. 4 is an exploded perspective view showing the ball feeding mechanism of the present invention.

FIG. 5 is a schematic diagram of the combination of the ball feeding mechanism of the present invention and the ball serving mechanism.

Fig. 6 is a schematic view showing the combination of the main components of the ball feeding mechanism, the ball feeding mechanism and the ball feeding mechanism of the present invention and the clamp position at the highest position.

Figure 7 is a schematic view of another perspective in accordance with Figure 6.

Figure 8 is a schematic view of still another view in accordance with Figure 6.

Figure 9 is a perspective view of the overall assembly of the present invention.

Figure 10 is a rear plan view of the overall assembly of the present invention.

Figure 11 is a cross-sectional view taken along line A-A of Figure 10 .

Figure 12 is an overall combination and partial cross-sectional view of the present invention.

Figure 13 is a schematic illustration of the elevation angle of the emission angle of the present invention.

Figure 14 is a schematic illustration of the emission angle of the present invention at a horizontal angle.

Figure 15 is a schematic view showing the combination of the main components of the ball feeding mechanism, the ball feeding mechanism and the ball feeding mechanism of the present invention and the clamp position at the lowest position.

Figure 16 is a schematic view of another perspective in accordance with Figure 15.

Figure 17 is a schematic view of still another view in accordance with Figure 15.

FIG. 18 is a schematic structural view of the mechanism of the present invention in combination with a control module and the like.

10. . . Base frame

11. . . Chassis

12. . . Main Frame

13. . . support

14/15. . . Connecting piece

16. . . The front cover

17. . . Opening

18. . . Back cover

20. . . Ball feeding mechanism

twenty one. . . Swivel assembly

210. . . Locating ring

211. . . Guide ring

212. . . Tooth ring

twenty two. . . Ball

twenty three. . . First motor

twenty four. . . gear

25. . . Wheel

26. . . Ring groove

30. . . Ball sending mechanism

31. . . Fixture

310. . . Positioning seat

311. . . Slide

312. . . Pinch

32/33. . . link

34. . . Actuating lever

35. . . crank

36. . . Second motor

40. . . Teeing mechanism

41/42. . . Pressure wheel

43/44. . . Elastic collar

45/46. . . Seat

47/48. . . Third motor

49. . . Tension spring

70. . . Support frame

71. . . Pivot hole

73. . . Rod body

74. . . Grip

80. . . Heavy block

Claims (7)

A badminton serve machine includes a base frame, and a ball feeding mechanism and a ball feeding mechanism disposed on the base frame; the ball feeding mechanism is disposed on the base frame for providing a badminton ball; the ball feeding mechanism is used for Sending the badminton ball to a ball-issuing mechanism, the badminton ball is outwardly launched by the ball-feeding mechanism; wherein: the ball-feeding mechanism is disposed on the base frame, and includes a swivel assembly, a plurality of ball cylinders, and a first motor The plurality of ball ring cloths are positioned on the rotating ring assembly; the first motor is configured to drive the rotating ring assembly to rotate at an angle such that the ball barrel is located at a ball feeding position and is a ball to be held The rotating ring assembly includes a positioning ring, a guiding ring and a ring gear fixed together; the positioning ring is circumferentially provided for positioning the plurality of balls to be radially distributed; one of the first motors is first The output end is provided with a gear, the gear meshes with the tooth portion of the tooth ring; the base frame is provided with a plurality of rollers located on the same circle, and a ring groove is arranged on the circumferential surface of each roller, and the inner edge of the guide ring Embedding the annular groove of each of the rollers; the ball feeding mechanism is used for grasping In the ball head of the badminton ball to be supplied to the ball barrel, and sent to the ball serving mechanism; and a first sensing component detects whether there is still a badminton ball inside the ball barrel, when there is no badminton ball in the ball barrel to be supplied a control signal is generated, and the sensing signal is received by a control module, and a control signal is generated according to the sensing signal, and the first motor is controlled by the control signal, and the control module includes a serving speed. The adjustment module, the serving speed adjustment module is adapted by a user to control the speed of the badminton launching of the teeing mechanism, so as to generate different speeds when the badminton ball is launched. The badminton serve machine of claim 1, wherein the base frame is pivotally disposed on a support frame, the base frame is adjustable in angle with respect to the support frame; and the support frame is pivotally provided with a body. The block body is provided with a longitudinal through hole and a transverse screw hole. The screw hole communicates with the through hole. The through hole penetrates through a rod body. One end of the rod body is pivotally connected to the base frame, and the screw hole is locked with a bolt. The end is threaded into the perforation against the shaft. The badminton serve machine of claim 1, wherein the base frame comprises a chassis fixed together, a main frame and a bracket; the chassis is provided with the ball serving mechanism; the main frame is provided for the ball feeding mechanism Set thereon; the bracket is provided on the ball feeding mechanism. The badminton player according to claim 1, wherein the ball serving mechanism comprises two spaced-apart pressure rollers, each of which is provided with an elastic collar; the ball feeding mechanism sends the ball head of the badminton ball to the ball Between the two pressure rollers of the service mechanism, the ball is rolled by the two pressure rollers to emit the buff. The badminton serve machine of claim 4, wherein each of the pressure rollers is disposed on a body and is driven by a third motor disposed on the base body, and one end of the base body is pivotally connected to the base On the frame, the other end is connected with a spring, and the spring has the spring force of the two base bodies and the two pressure rollers. The badminton player according to claim 1, wherein each of the balls is provided with a weight, and the weight presses the badminton ball to point the ball head of the badminton ball at the center of the rotating ring assembly. Extend the outside of the tube. The badminton serve machine of claim 1, wherein the hand/auto switch further comprises an automatic or manual mode; when the automatic mode is selected, the second motor continues to operate to drive the crank to continuously rotate; when the manual mode is selected The user controls the second motor to drive the crank to rotate one revolution by a firing command input button, and sequentially controls the ball feeding mechanism. Send the ball.